Event calendar file
from 27 September 2004 to 1 October 2004 (Europe/Zurich)
Interlaken, Switzerland
Europe/Zurich timezone
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We have developed a c++ software package, called "RecPack",
which allows the reconstruction of dynamic trajectories in any experimental setup.
The basic utility of the package is the fitting of trajectories in the presence
of random and systematic perturbations to the system
(multiple scattering, energy loss, inhomogeneous magnetic fields, etc)
via a Kalman Filter fit. It also includes
... More
Presented by A. CERVERA VILLANUEVA
on
30 Sep 2004
at
10:00
"Where are your Wares"
Computing in the broadest sense has a long history, and Babbage (1791-1871),
Hollerith (1860-1929) Zuse (1910-1995), many other early pioneers, and the wartime
code breakers, all made important breakthroughs. CERN was founded as the first
valve-based digital computers were coming onto the market.
I will consider 50 years of Computing at CERN from the following v
... More
Presented by David WILLIAMS
on
27 Sep 2004
at
09:30
64-Bit commodity clusters and farms based on AMD technology meanwhile have been
proven to achieve a high computing power in many scientific applications. This report
first gives a short introduction into the specialties of the amd64 architecture and
the characteristics of two-way Opteron systems.
Then results from measuring the performance and the behavior of such systems in
various Particle
... More
Presented by S. WIESAND
on
29 Sep 2004
at
15:00
The Alice High Level Trigger (HLT) cluster is foreseen to consist of
400 to 500 dual SMP PCs at the start-up of the experiment. The
software running on these PCs will consist of components
communicating via a defined interface, allowing flexible software
configurations. During Alice's operation the HLT has to be
continuously active to avoid detector dead time. To ensure that the
severa
... More
Presented by T.M. STEINBECK
on
29 Sep 2004
at
18:10
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
We have developed and deployed a data grid for the processing of data
from the Belle experiment, and for the production of simulated Belle
data. The Belle Analysis Data Grid brings together compute and storage
resources across five separate partners in Australia, and the
Computing Research Centre at the KEK laboratory in Tsukuba, Japan.
The data processing resouces are general purpose,
... More
Presented by G R. MOLONEY
on
30 Sep 2004
at
17:50
The paper describes a component-based framework for data stream processing that
allows for configuration, tailoring, and run-time system reconfiguration. The
system’s architecture is based on a pipes and filters pattern, where data is passed
through routes between components. Components process data and add, substitute,
and/or remove named data items from a data stream. They can also ma
... More
Presented by J. NOGIEC
on
27 Sep 2004
at
14:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The standard procedures for the extraction of gravitational wave signals coming
from coalescing binaries provided by the output signal of an interferometric
antenna may require computing powers generally not available in a single computing
centre or laboratory. A way to overcome this problem consists in using the
computing power available in different places as a single geographically
di
... More
Presented by S. PARDI
on
27 Sep 2004
at
15:00
A vertex fit algorithm was developed based on the Gaussian-sum filter
(GSF) and implemented in the framework of the CMS reconstruction
program. While linear least-squares estimators are optimal in case
all observation errors are Gaussian distributed, the GSF offers a
better treatment of the non-Gaussian distribution of track parameter
errors when these are modeled by Gaussian mixtures.
... More
Presented by Dr. T. SPEER
on
30 Sep 2004
at
17:10
VRVS (Virtual Room Videoconferencing System) is a unique, globally
scalable next-generation system for real-time collaboration by small
workgroups, medium and large teams engaged in research, education and
outreach. VRVS operates over an ensemble of national and international
networks. Since it went into production service in early 1997, VRVS has
become a standard part of the toolset used dai
... More
Presented by Mr. P. GALVEZ
on
30 Sep 2004
at
17:50
Super-computers will be replaced more and more by PC cluster
systems. Also future LHC experiments will use large PC clusters.
These clusters will consist of off-the-shelf PCs, which in general
are not built to run in a PC farm. Configuring, monitoring and
controlling such clusters requires a serious amount of time
consuming and administrative effort.
We propose a cheap and easy hardwar
... More
Presented by R. PANSE
on
29 Sep 2004
at
15:00
The Atlas Level-2 trigger provides a software-based event selection
after the initial Level-1 hardware trigger. For the muon events, the
selection is decomposed in a number of broad steps: first, the Muon
Spectrometer data are processed to give physics quantities
associated to the muon track (standalone features extraction) then,
other detector data are used to refine the extracted featu
... More
Presented by A. DI MATTIA
on
27 Sep 2004
at
14:40
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The LHCb Data Challenge 04 includes the simulation of over 200 M
simulated events using distributed computing resources on N sites and
extending along 3 months. To achieve this goal a dedicated Production
grid (DIRAC) has been deployed. We will present the Job
Monitoring and Accounting services developed to follow the status of
the production along its way and to evaluate the results at the e
... More
Presented by M. SANCHEZ-GARCIA
on
30 Sep 2004
at
17:30
Analyzing Grid monitoring data requires the capability of dealing with
multidimensional concepts intrinsic to Grid systems. The meaningful
dimensions identified in recent works are the physical dimension
referring to geographical location of resources, the Virtual
Organization (VO) dimension, the time dimension and the monitoring
metrics dimension. In this paper, we discuss the applicatio
... More
Presented by G. RUBINI
on
29 Sep 2004
at
10:00
We present the design and performance analysis of a new event reconstruction chain deployed for analysis of
STAR data acquired during the 2004 run and beyond. The creation of this new chain involved the elimination
of obsolete FORTRAN components, and the development of equivalent or superior modules written in C++.
The new reconstruction chain features a new and fast TPC cluster finder, a n
... More
Presented by C. PRUNEAU
on
29 Sep 2004
at
18:10
Software Configuration Management (SCM) Patterns and the Continuous Integration
method are recent and powerful techniques to enforce a common software
engineering process across large, heterogeneous, rapidly changing development
projects where a rapid release lifecycle is required. In particular the Continuous
Integration method allows tracking and addressing problems in the software
componen
... More
Presented by A. DI MEGLIO
on
30 Sep 2004
at
10:00
The High Energy Physics Group at the University of Florida is involved in a variety
of projects ranging from High Energy Experiments at hadron and electron positron
colliders to cutting edge computer science experiments focused on grid computing.
In support of these activities members of the Florida group have developed and
deployed a local computational facility which consists of several
... More
Presented by J. RODRIGUEZ
on
27 Sep 2004
at
15:20
We present a work-in-progress system, called GUMS, which automates
the processes of Grid user registration and management and supports
policy-aware authorization at well. GUMS builds on existing VO
management tools (LDAP VO, VOMS and VOMRS) with a local grid user
management system and a site database which stores user credentials,
accounting history and policies in XML format. We use VOMRS,
... More
Presented by G. CARCASSI
on
29 Sep 2004
at
17:10
Building a state of the art high energy physics detector like CMS
requires strict interoperability and coherency in the design and
construction of all sub-systems comprising the detector. This issue
is especially critical for the many database components that are
planned for storage of the various categories of data related to
the construction, operation, and maintainance of the detector
... More
on
30 Sep 2004
at
10:00
We describe a database solution in a web application to centrally
manage the configuration information of computer systems. It extends the
modular cluster management tool Quattor with a user friendly web interface.
System configurations managed by Quattor are described with the aid of PAN, a
declarative language with a command line and a compiler interface. Using a
relational schema, we a
... More
Presented by Z. TOTEVA
on
28 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The observation of high-energetic gamma-rays with ground based air cerenkov telescopes is one of
the most exciting areas in modern astro particle physics. End of the year 2003 the MAGIC telescope
started operation.The low energy threshold for gamma-rays together with different background
sources leads to a considerable amount of data. The analysis will be done in different institutes
sprea
... More
Presented by H. KORNMAYER
on
27 Sep 2004
at
15:40
A grid system is a set of heterogeneous computational and storage
resources, distributed on a large geographic scale, which belong to
different administrative domains and serve several different
scientific communities named Virtual Organizations (VOs). A virtual
organization is a group of people or institutions which collaborate
to achieve common objectives. Therefore such system has to
... More
Presented by T. COVIELLO
on
29 Sep 2004
at
10:00
The muCap experiment at the Paul Scherrer Institut (PSI) will measure the rate of
muon capture on the proton to a precision of 1% by comparing the apparent lifetimes
of positive and negative muons in hydrogen. This rate may be related to the induced
pseudoscalar weak form factor of the proton.
Superficially, the muCap apparatus looks something like a miniature model of a
collider detect
... More
Presented by F. GRAY
on
30 Sep 2004
at
10:00
A kinematic fit package was developed based on Least Means Squared
minimization with Lagrange multipliers and Kalman filter techniques
and implemented in the framework of the CMS reconstruction program.
The package allows full decay chain reconstruction from final state
to primary vertex according to the given decay model. The class
framework allowing decay tree description on every reco
... More
on
30 Sep 2004
at
16:50
Statistical methods play a significant role throughout the life-
cycle of HEP experiments, being an essential component of physics
analysis. We present a project in progress for the development of
an object-oriented software toolkit for statistical data analysis.
More in particular, the Statistical Comparison component of the
toolkit provides algorithms for the comparison of data distrib
... More
Presented by M.G. PIA
on
30 Sep 2004
at
17:30
AIDA, Abstract Interfaces for Data Analysis, is a set of abstract interfaces
for data analysis components: Histograms, Ntuples, Functions, Fitter,
Plotter and other typical analysis categories. The interfaces are currently
defined in Java, C++ and Python and implementations exist in the form of
libraries and tools using C++ (Anaphe/Lizard, OpenScientist), Java (Java
Analysis Studio) and Pytho
... More
Presented by Victor SERBO
on
27 Sep 2004
at
15:20
Next generation high energy physics experiments planned at the CERN
Large Hadron Collider is so demanding in terms of both computing
power and mass storage that data and CPU's can not be concentrated in
a single site and will be distributed on a computational Grid
according to a "multi-tier".
LHC experiments are made of several thousands of people from a few
hundreds of institutes spre
... More
Presented by G. LO RE
on
30 Sep 2004
at
14:20
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
AMS-02 Computing and Ground Data Handling.
V.Choutko (MIT, Cambridge), A.Klimentov (MIT, Cambridge) and
M.Pohl (Geneva University)
AMS (Alpha Magnetic Spectrometer) is an experiment to search in
space for dark matter and antimatter on the International Space
Station (ISS). The AMS detector had a precursor flight in 1998 (STS-
91, June 2-12, 1998). More
... More
Presented by A. KLIMENTOV
on
29 Sep 2004
at
14:40
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
The ARDA project was started in April 2004 to support
the four LHC experiments (ALICE, ATLAS, CMS and LHCb)
in the implementation of individual
production and analysis environments based on the EGEE middleware.
The main goal of the project is to allow a fast feedback between the
experiment and the middleware development teams via the
construction and the usage of end-to-end prototypes
a
... More
Presented by THE ARDA TEAM
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
We describe the design and operational experience of the ATLAS production system as
implemented for execution on Grid3 resources. The execution environment consisted
of a number of grid-based tools: Pacman for installation of VDT-based Grid3 services
and ATLAS software releases, the Capone execution service built from the
Chimera/Pegasus virtual data system for directed acyclic graph (DAG
... More
Presented by M. MAMBELLI
on
29 Sep 2004
at
16:50
In addition to the well-known challenges of computing and data handling at LHC
scales, LHC experiments have also approached the scalability limit of manual
management and control of the steering parameters ("primary numbers") provided to
their software systems. The laborious task of detector description benefits from
the implementation of a scalable relational database approach. We have
... More
on
30 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The ATLAS distributed analysis (ADA) system is described. The ATLAS
experiment has more that 2000 physicists from 150 insititutions in
34 countries. Users, data and processing are distributed over these
sites. ADA makes use of a collection of high-level web services
whose interfaces are expressed in terms of AJDL (abstract job
definition language) which includes descriptions of datasets,
tra
... More
Presented by D. ADAMS
on
30 Sep 2004
at
15:20
The ATLAS Metadata Interface (AMI) project provides a set of generic
tools for managing database applications. AMI has a three-tier
architecture with a core that supports a connection to any RDBMS
using JDBC and SQL. The middle layer assumes that the databases have
an AMI compliant self-describing structure. It provides a generic
web interface and a generic command line interface. The top
... More
Presented by S. ALBRAND
on
29 Sep 2004
at
16:50
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
In order to validate the Offline Computing Model and the
complete software suite, ATLAS is running a series of Data
Challenges (DC). The main goals of DC1 (July 2002 to April
2003) were the preparation and the deployment of the
software required for the production of large event samples,
and the production of those samples as a worldwide
distributed activity.
DC2 (May 2004 until October
... More
Presented by L. GOOSSENS
on
27 Sep 2004
at
14:40
State of the art in the field of fitting particle tracks to one
vertex is the Kalman technique. This least-squares (LS) estimator is
known to be ideal in the case of perfect assignment of tracks to
vertices and perfectly known Gaussian errors. Experimental data and
detailed simulations always depart from this perfect model. The
imperfections can be expected to be larger in high luminosit
... More
Presented by W. WALTENBERGER
on
30 Sep 2004
at
10:00
A version of the Bertini cascade model for hadronic interactions is part of
the Geant4 toolkit, and may be used to simulate pion-, proton-, and
neutron-induced reactions in nuclei. It is typically valid for incident
energies of 10 GeV and below, making it especially useful for the simulation of
hadronic calorimeters. In order to generate the intra-nuclear cascade, the
code depends on ta
... More
on
27 Sep 2004
at
17:30
The size and complexity of the present HEP experiments
represents an enormous effort in the persistency of data. These efforts imply
a tremendous investment in the databases field not only for the event data
but also for data that is needed to qualify this one - the Conditions Data.
In the present document we'll describe the strategy for addressing the
Conditions data problem in the ATLAS e
... More
Presented by A. AMORIM
on
29 Sep 2004
at
17:30
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The AliEn system, an implementation of the Grid paradigm developed by
the ALICE Offline Project, is currently being used to produce and
analyse Monte Carlo data at over 30 sites on four continents. The
AliEn Web Portal is built around Open Source components with a
backend based on Grid Services and compliant with the OGSA model.
An easy and intuitive presentation layer gives the opportuni
... More
Presented by P E. TISSOT-DAGUETTE
on
30 Sep 2004
at
14:20
The BaBar experiment has accumulated many terabytes of data on
particle physics reactions, accessed by a community of hundreds of
users.
Typical analysis tasks are C++ programs, individually written by the
user, using shared templates and libraries. The resources have
outgrown a single platform and a distributed computing model is
needed. The grid provides the natural toolset. Howeve
... More
Presented by M. JONES
on
29 Sep 2004
at
10:00
This article introduces a Embedded Linux System based on vme series
PowerPC as well as the base method on how to establish the system.
The goal of the system is to build a test system of VMEbus device.
It also can be used to setup the data acquisition and control
system. Two types of compiler are provided by the developer system
according to the features of the system and the PowerPC. At
... More
Presented by M. YE
on
27 Sep 2004
at
15:00
The CMS detector simulation package, OSCAR, is based on the Geant4 simulation toolkit
and the CMS object-oriented framework for simulation and reconstruction.
Geant4 provides a rich set of physics processes describing in detail electro-magnetic
and hadronic interactions. It also provides the tools for the implementation of the
full CMS detector geometry and the interfaces required for recoveri
... More
Presented by M. STAVRIANAKOU
on
29 Sep 2004
at
14:20
Grid computing is a large scale geographically distributed and
heterogeneous system that provides a common platform for running
different grid enabled applications. As each application has
different characteristics and requirements, it is a difficult
task to develop a scheduling strategy able to achieve optimal
performance because application-specific and dynamic system status
have to
... More
Presented by T. COVIELLO
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The SAMGrid team has recently refactored its test harness suite for
greater flexibility and easier configuration. This makes possible
more interesting applications of the test harness, for component
tests, integration tests, and stress tests. We report on the
architecture of the test harness and its recent application
to stress tests of a new analysis cluster at Fermilab, to explore the
... More
Presented by A. LYON
on
27 Sep 2004
at
17:50
The FLUKA Monte Carlo transport code is being used for different
applications in High Energy, Cosmic Ray and Accelerator Physics.
Here we review some of the ongoing projects which are
based on this simulation tool.
In particular, as far as accelerator physics is concerned, we wish
to summarize the work in progress for the LHC and the CNGS project.
From the point of view of experimental acti
... More
Presented by G. BATTISTONI
on
27 Sep 2004
at
14:40
In this paper we will discuss how Aspect-Oriented Programming (AOP) can be used to
implement and extend the functionality of HEP architectures in areas such as
performance monitoring, constraint checking, debugging and memory management. AOP is
the latest evolution in the line of technology for functional decomposition which
includes Structured Programming (SP) and Object-Oriented Programming
... More
Presented by C. TULL
on
30 Sep 2004
at
14:40
Aspect-Oriented Programming (AOP) is a new paradigm promising to allow
further modularization of large software frameworks, like those developed
in HEP. Such frameworks often manifest several orthogonal axes of contracts
(Crosscutting Concerns - CC) leading to complex multidepenencies. Currently
used programing languages and development methodologies don't allow to easily
identify and encaps
... More
Presented by J. HRIVNAC
on
30 Sep 2004
at
14:20
The new authentication and security services available in the ROOT framework
for client/server applications will be described.
The authentication scheme has been designed with the purpose to make the
system complete and flexible, to fit the needs of the coming clusters and
facilities.
Three authentication methods have been made available: Globus/GSI,
for GRID-awareness; SSH, to allow using
... More
Presented by G. GANIS
on
29 Sep 2004
at
16:50
In a large campus network, such as Fermilab's ten thousand nodes, scanning initiated
from either outside of or within the campus network raises security concerns, may
have very serious impact on network performance, and even disrupt normal operation of
many services. In this paper we introduce a system for detecting and automatic
blocking of excessive traffic of different nature, scanning, DoS
... More
Presented by A. BOBYSHEV
on
28 Sep 2004
at
10:00
Software testing is a difficult, time-consuming process that
requires technical sophistication and proper planning. This
is especially true for the large-scale software projects of
High Energy Physics where constant modifications and
enhancements are typical. The automated nightly testing is
the important component of NICOS, NIghtly COntrol System,
that manages the multi-platform nightly bui
... More
Presented by A. UNDRUS
on
30 Sep 2004
at
10:00
The photo injector test facility at DESY Zeuthen (PITZ) was built to
develop, operate and optimize photo injectors for future free
electron lasers and linear colliders. In PITZ we use a DAQ system
that stores data as a collection of ROOT files, forming our database
for offline analysis. Consequently, the offline analysis will be
performed by a ROOT application, written at least partly by
... More
Presented by G. ASOVA
on
30 Sep 2004
at
16:30
As any software project grows in both its collaborative and mixed codebase nature,
current tools like CVS and Maven start to sag under the pressure of complex
sub-project dependencies and versioning. A developer-wide failure in mastery of these
tools will inevitably lead to an unrecoverable instability of a project. Even keeping
a single software project stable in a large collaborative environ
... More
Presented by M. STOUFER
on
30 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The BaBar experiment has migrated its event store from an
objectivity based system to a system using ROOT-files, and along
with this has developed a new bookkeeping design. This bookkeeping
now combines data production, quality control, event store
inventory, distribution of BaBar data to sites and user analysis in
one central place, and is based on collections of data stored as
ROOT-
... More
Presented by D. SMITH
on
30 Sep 2004
at
17:10
The BaBar experiment at SLAC studies B-physics at the Upsilon(4S) resonance using
the high-luminosity e+e- collider PEP-II at the Stanford Linear Accelerator Center
(SLAC). Taking, processing and analyzing the very large data samples is a
significant computing challenge.
This presentation will describe the entire BaBar computing chain and illustrate
the solutions chosen as well as the
... More
Presented by P. ELMER
on
27 Sep 2004
at
11:30
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
for the BaBar Computing Group.
The analysis of the BaBar experiment requires many times the measured
data to be produced in simulation. This requirement has resulted in
one of the largest distributed computing projects ever completed.
The latest round of simulation for BaBar started in early 2003, and
completed in early 2004, and encompassed over 1 million jobs, and
over 2.2 billi
... More
Presented by D. SMITH
on
29 Sep 2004
at
14:00
One of the main features of the ALICE detector at LHC is the capability to identify particles in a very broad
momentum range from 0.1 GeV/c up to 10 GeV/c. This can be achieved only by combining, within a common
setup, several detecting systems that are efficient in some narrower and complementary momentum sub-
ranges. The situation is further complicated by the amount of data to be processed
... More
Presented by I. BELIKOV
on
30 Sep 2004
at
17:50
As ATLAS begins validation of its computing model in 2004, requirements
imposed upon ATLAS data management software move well beyond simple persistence,
and beyond the "read a file, write a file" operational model that has sufficed for
most simulation production. New functionality is required to support the
ATLAS Tier 0 model, and to support deployment in a globally distributed environment
i
... More
Presented by D. MALON
on
29 Sep 2004
at
10:00
With the improvements in CPU and disk speed over the past years, we
were able to exceed the original design data logging rate of 40MB/s by
a factor of 3 already for the Run 3 in 2002. For the Run 4 in 2003, we
increased the raw disk logging capacity further to about 400MB/s.
Another major improvement was the implementation of compressed data
logging. The PHENIX raw data, after application
... More
Presented by Martin PURSCHKE
on
28 Sep 2004
at
10:00
In this paper we describe the current state of the art in equipment, software and
methods for transferring large scientific datasets at high speed around the globe.
We first present a short introductory history of the use of networking in HEP, some
details on the evolution, current status and plans for the Caltech/CERN/DataTAG
transAtlantic link, and a description of the topology and capab
... More
Presented by Dr. S. RAVOT
on
30 Sep 2004
at
14:40
How do we get High Throughput data transport to real users? The MB-NG project is a
major collaboration which brings together expertise from users, industry, equipment
providers and leading edge e-science application developers. Major successes in the
areas of Quality of Service (QoS) and managed bandwidth have provided a leading edge
U.K. Diffserv enabled network running at 2.5 Gbit/s. One
... More
Presented by R. HUGHES-JONES
on
30 Sep 2004
at
17:10
As an underpinning of AFS and Windows 2000, and as a formally proven
security protocol in its own right, Kerberos is ubiquitous among HEP
sites. Fermilab and users from other sites have taken advantage of this
and built a diversity of distributed applications over Kerberos v5. We
present several projects in which this security infrastructure has been
leveraged to meet the requirements of far-
... More
Presented by M. CRAWFORD
on
29 Sep 2004
at
16:30
In the last few years grid software (middleware) has become available
from various sources. However, there are no standards yet which
allow for an easy integration of different services.
Moreover, middleware was produced by different projects with the main
goal of developing new functionalities rather than production quality
software.
In the context of the LHC Computing Grid project (L
... More
Presented by L. PONCET
on
29 Sep 2004
at
10:00
The Cern Advanced STORage (CASTOR) system is a scalable high throughput
hierarchical storage system developed at CERN. CASTOR was first deployed
for full production use in 2001 and has expanded to now manage around two
PetaBytes and almost 20 million files. CASTOR is a modular system,
providing a distributed disk cache, a stager, and a back end tape archive,
accessible via a global logical na
... More
Presented by J-D. DURAND
on
29 Sep 2004
at
16:30
A new, completely redesigned Condition/DB was deployed in BaBar in October 2002. It
replaced the old database software used through the first three and half years of
data taking.
The new software aims at performance and scalability limitations of the original
database. However this major redesign brought in a new model of the metadata, brand
new technology- and implementation- independent
... More
Presented by I. GAPONENKO
on
29 Sep 2004
at
17:50
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
CERN has about 5500 Desktop PCs. These computers offer a large pool of resources
that can be used for physics calculations outside office hours.
The paper describes a project to make use of the spare CPU cycles of these PCs for
LHC tracking studies. The client server application is implemented as a lightweight,
modular screensaver and a Web Application containing the physics job repository.
... More
Presented by A. WAGNER
on
29 Sep 2004
at
10:00
For the last 18 months CERN has collaborated closely with several industrial partners
to evaluate, through the opencluster project, technology that may (and hopefully
will) play a strong role in the future computing solutions, primarily for LHC but
possibly also for other HEP computing environments. Unlike conventional field testing
where solutions from industry are evaluated rather independen
... More
Presented by S. JARP
on
29 Sep 2004
at
15:20
Quark-gluon strings are usually fragmented on the light cone in hadrons
(PITHIA, JETSET) or in small hadronic clusters which decay in hadrons
(HERWIG). In both cases the transverse momentum distribution is
parameterized as an unknown function. In CHIPS the colliding hadrons
stretch Pomeron ladders to each other and, when the Pomeron ladders meet
in the rapidity space, they create Quasmons (ha
... More
Presented by M. KOSOV
on
27 Sep 2004
at
17:50
Supporting multiple large collaborations on shared compute
farms has typically resulted in divergent requirements from the
users on the configuration of these farms. As the frameworks used
by these collaborations are adapted to use Grids, this issue will likely
have a significant impact on the effectiveness of Grids.
To address these issues, a method was developed at Lawrence Berkeley Nation
... More
Presented by S. CANON
on
27 Sep 2004
at
15:40
CLHEP is a set of HEP-specific foundation and utility classes such as
random number generators, physics vectors, and particle data tables.
Although CLHEP has traditionally been distributed as one large library,
the user community has long wanted to build and use CLHEP packages separately.
With the release of CLHEP 1.9, CLHEP has been reorganized and enhanced
to enable building and using CL
... More
Presented by Andreas PFEIFFER
on
30 Sep 2004
at
16:50
CMD-3 is the general purpose cryogenic magnetic detector for VEPP-2000
electron-positron collider, which is being commissioned at Budker Institute of
Nuclear Physics (BINP, Novosibirsk, Russia). The main aspects of physical program of
the experiment are study of known and search for new vector mesons, study of the
ppbar a nnbar production cross sections in the vicinity of the threshold and sea
... More
Presented by A. ZAYTSEV
on
30 Sep 2004
at
10:00
The CMS Detector Description Database (DDD) consists of a C++ API and an XML based
detector description language. DDD is used by the CMS simulation (OSCAR),
reconstruction (ORCA), and visualization (IGUANA) as well by test beam software that
relies on those systems. The DDD is a sub-system within the COBRA framework of the
CMS Core Software. Management of the XML is currently done using a sepa
... More
Presented by M. CASE
on
29 Sep 2004
at
17:10
For data analysis in an international collaboration it is important
to have an efficient procedure to distribute, install and update the
centrally maintained software. This is even more true when not only
locally but also grid accessible resources are to be exploited.
A practical solution will be presented that has been successfully employed
for CMS software installations on systems ranging f
... More
Presented by K. RABBERTZ
on
30 Sep 2004
at
10:00
This document will review the design considerations, implementations
and performance of the CMS Tracker Visualization tools. In view of
the great complexity of this subdetector (more than 50 millions
channels organized in 17000 modules each one of these being a
complete detector), the standard CMS visualisation tools (IGUANA and
IGUANACMS) that provide basic 3D capabilities and integrati
... More
Presented by M.S. MENNEA
on
30 Sep 2004
at
10:00
Carrot is a scripting module for the Apache webserver. Based on the
ROOT framework, it has a number of powerful features, including the
ability to embed C++ code into HTML pages, run interpreted and
compiled C++ macros, send and execute C++ code on remote web
servers, browse and analyse the remote data located in ROOT files
with the web browser, access and manipulate databases, and gener
... More
Presented by Mr. V. ONUCHIN
on
30 Sep 2004
at
10:00
A description of a Condor-based, Grid-aware batch
software system configured to function asynchronously
with a mass storage system is presented. The software
is currently used in a large Linux Farm (2700+
processors) at the RHIC and ATLAS Tier 1 Computing
Facility at Brookhaven Lab. Design, scalability,
reliability, features and support issues with a
complex Condor-based batch system
... More
Presented by T. WLODEK
on
29 Sep 2004
at
10:00
After successful implementation and deployment of the dCache system
over the last years, one of the additional required services, the
namespace service, is faced additional and completely new
requirements. Most of these are caused by scaling the system, the
integration with Grid services and the need for redundant (high
availability) configurations. The existing system, having only an
NFSv2
... More
Presented by T. MKRTCHYAN
on
27 Sep 2004
at
17:50
There are two cluster architecture approaches used at CERN to provide central CVS
services. The first one (http://cern.ch/cvs) depends on AFS for central storage of
repositories and offers automatic load-balancing and fail-over mechanisms.
The second one (http://cern.ch/lcgcvs) is an N + 1 cluster based on local file
systems, using data replication and not relying on AFS. It does not prov
... More
Presented by M. GUIJARRO
on
28 Sep 2004
at
10:00
A Toolkit for Statistical Data Analysis has been recently released.
Thanks to this novel software system, for the first time an ample
set of sophisticated algorithms for the comparison of data
distributions (goodness of fit tests) is made available to the High
Energy Physics community in an open source product. The statistical
algorithms implemented belong to two sets, for the comparison
... More
Presented by M.G. PIA
on
30 Sep 2004
at
10:00
We present a composite framework which exploits the advantages of
the CMS data model and uses a novel approach for building CMS
simulation, reconstruction, visualisation and future analysis
applications. The framework exploits LCG SEAL and CMS COBRA plug-ins
and extends the COBRA framework to pass communications between the
GUI and event threads, using SEAL callbacks to navigate through
... More
Presented by I. OSBORNE
on
27 Sep 2004
at
17:30
The LHC experiments are undertaking various data-challenges in the
run-up to completion of their computing models and the submission of
the experiment and of the LHC Computing Grid (LCG), Technical Design
Reports(TDR) in 2005. In this talk we summarize the current working
models of the LHC Computing Models, identifying their similarities and
differences. We summarize the results and status of
... More
Presented by David STICKLAND
on
30 Sep 2004
at
09:30
The Belle experiment operates at the KEKB accelerator, a high
luminosity asymmetric energy e+ e- machine. KEKB has achieved the
world highest luminosity of 1.39 times 10^34 cm-2s-1. Belle
accumulates more than 1 million B Bbar pairs in one good day.
This corresponds to about 1.2 TB of raw data per day. The amount of
the raw and processed data accumulated so far exceeds 1.4 PB.
Belle's
... More
Presented by N. KATAYAMA
on
27 Sep 2004
at
11:00
The concepts and technologies applied in data acquisition systems have changed
dramatically over the past 15 years. Generic DAQ components and standards such as
CAMAC and VME have largely been replaced by dedicated FPGA and ASIC boards, and
dedicated real-time operation systems like OS9 or VxWorks have given way to Linux-
based trigger processor and event building farms. We have also seen a
... More
Presented by M. PURSCHKE
on
27 Sep 2004
at
12:00
Conditions Databases are beginning to be widely used in the ATLAS
experiment. Conditions data are time-varying data describing the state of the
detector used to reconstruct the event data. This includes all sorts of slowly
evolving data like detector alignment, calibration, monitoring and data from Detector
Control System (DCS).
In this paper we'll present the interfaces between the Condit
... More
Presented by D. KLOSE
on
30 Sep 2004
at
10:00
Presented by Wolfgang VON RUEDEN
on
1 Oct 2004
at
12:25
Presented by Lothar BAUERDICK
on
1 Oct 2004
at
11:55
The unprecedented size and complexity of the ATLAS TDAQ system
requires a comprehensive and flexible control system. Its role
ranges from the so-called run-control, e.g. starting and stopping
the datataking, to error handling and fault tolerance. It also
includes intialisation and verification of the overall system.
Following the traditional approach a hierachical system of
customizable
... More
Presented by D. LIKO
on
29 Sep 2004
at
17:10
The PHENIX DAQ system is managed by a control system responsible for
the configuration and monitoring of the PHENIX detector hardware and
readout software. At its core, the control system, called Runcontrol,
is a process that manages the various components by way of a
distributed architecture using CORBA. The control system, called
Runcontrol, is a set of process that manages virtually all
... More
Presented by Martin PURSCHKE
on
28 Sep 2004
at
10:00
Building on several years of sucess with the MCRunjob projects at
DZero and CMS, the fermilab sponsored joint Runjob project aims to
provide a Workflow description language common to three experiments:
DZero, CMS and CDF. This project will encapsulate the remote
processing experiences of the three experiments in an extensible
software architecture using web services as a
communication
... More
Presented by P. LOVE
on
29 Sep 2004
at
10:00
This paper describes the evolution of fabric management at CERN's T0/T1 Computing
Center, from the selection and adoption of prototypes produced by the European
DataGrid (EDG) project[1] to enhancements made to them.
In the last year of the EDG project, developers and service managers have been
working to understand and solve operational and scalability issues.
CERN has adopted and stren
... More
Presented by G. CANCIO
on
27 Sep 2004
at
14:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
The D0 experiment at the Tevatron is collecting some 100 Terabytes of data
each year and has a very high need of computing resources for the various
parts of the physics program. D0 meets these demands by establishing a
world - increasingly based on GRID technologies.
Distributed resources are used for D0 MC production and data
reprocessing of 1 billion events, requiring 250 TB to be transp
... More
Presented by T. HARENBERG
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
DIRAC is the LHCb distributed computing grid infrastructure for MC
production and analysis. Its architecture is based on a set of distributed
collaborating services. The service decomposition broadly follows the ARDA
project proposal, allowing for the possibility of interchanging the EGEE/ARDA
and DIRAC components in the future. Some components developed outside the
DIRAC project are alread
... More
Presented by A. TSAREGORODTSEV
on
30 Sep 2004
at
18:10
The DIRAC system developed for the CERN LHCb experiment is a grid
infrastructure for managing generic simulation and analysis jobs. It
enables jobs to be distributed across a variety of computing
resources, such as PBS, LSF, BQS, Condor, Globus, LCG, and individual
workstations.
A key challenge of distributed service architectures is that there is
no single point of control over all c
... More
Presented by I. STOKES-REES
on
29 Sep 2004
at
10:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
The Workload Management System (WMS) is the core component of the
DIRAC distributed MC production and analysis grid of the LHCb
experiment. It uses a central Task database which is accessed via
a set of central Services with Agents running on each of the LHCb
sites. DIRAC uses a 'pull' paradigm where Agents request tasks
whenever they detect their local resources are available.
The collabora
... More
Presented by V. GARONNE
on
29 Sep 2004
at
10:00
The DZERO Collider Expermient logs many of its Data Aquisition Monitoring
Information in long term storage. This information is most frequently used to
understand shift history and efficiency. Approximately two kilobytes of information
is stored every 15 second. We describe this system and the web interface provided.
The current system is distributed, running on Linux for the back end and
... More
Presented by G. WATTS
on
29 Sep 2004
at
17:30
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
Data management is one of the cornerstones in the distributed production computing
environment that the EGEE project aims to provide for a European e-Science
infrastructure. We have designed a set of services based on previous experience in
other Grid projects, trying to address the requirements of our user communities.
In this paper we summarize the most fundamental requirements and cons
... More
Presented by K. NIENARTOWICZ
on
27 Sep 2004
at
17:50
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
Abstract:
The D0 experiment faces many challenges enabling access to large
datasets for physicists on 4 continents. The strategy of solving these
problems on worlwide distributed computing clusters is followed.
Already since the begin of TEvatron RunII (March 2001) all Monte-Carlo
simulations are produced outside of Fermilab at remote systems. For
analyses
as system of regional analysis c
... More
Presented by D. WICKE
on
29 Sep 2004
at
10:00
In common grid installations, services responsible for storing big data
chunks, replication of those data and indexing their availability are usually
completely decoupled. And a task of synchronizing data is passed to either
user-level tools or separate services (like spiders) which are subject to
failure and usually cannot perform properly if one of underlying services
fails too.
The Nordu
... More
Presented by O. SMIRNOVA
on
29 Sep 2004
at
10:00
The Run II experiments at Fermilab, CDF and D0, have extensive database needs
covering many areas of their online and offline operations. Delivery of the data to
users and processing farms based around the world has represented major challenges to
both experiments. The range of applications employing databases includes data
management, calibration (conditions), trigger information, run configu
... More
Presented by L. LUEKING
on
29 Sep 2004
at
10:00
During a recent visit to SLAC, Tim Berners-Lee challenged the High
Energy Physics community to identify and implement HEP resources to
which Semantic Web technologies could be applied. This challenge
comes at a time when a number of other scientific disciplines (for
example, bioinformatics and chemistry) have taken a strong
initiative in making information resources compatible with Sema
... More
Presented by B. WHITE
on
30 Sep 2004
at
14:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
LCG2 is a large scale production grid formed by more than 40 worldwide distributed sites.
The aggregated number of CPUs exceeds 3000 several MSS systems are integrated in the system. Almost
all sites form an independent administrative domain.
On most of the larger sites the local computing resources have been integrated into the grid.
The system has been used for large scale production b
... More
Presented by M. SCHULZ
on
27 Sep 2004
at
16:50
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
CDF is an experiment at the Tevatron at Fermilab. One dominating
factor of the experiments' computing model is the high volume of raw,
reconstructed and generated data. The distributed data handling
services within SAM move these data to physics analysis
applications. The SAM system was already in use at the D-Zero
experiment. Due to difference in the computing model of the two
experiments s
... More
Presented by S. STONJEK
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
GridICE is a monitoring service for the Grid, it measures
significant Grid related resources parameters in order to analyze
usage, behavior and performance of the Grid and/or to detect and
notify fault situations, contract violations, and user-defined
events. In its first implementation, the notification service
relies on a simple model based on a pre-defined set of events.
The growing int
... More
Presented by N. DE BORTOLI
on
30 Sep 2004
at
16:50
Email is an essential part of daily work. The FNAL gateways process in excess of
700,000 messages per week. Amomng those messages are many containing viruses and
unwanted spam. This paper outlines the FNAL email system configuration. We will
discuss how we have defined our systems to provide optimum uptime as well as
protection against viruses, spam and unauthorized users.
Presented by J. SCHMIDT
on
28 Sep 2004
at
10:00
A proposal is made for the design and implementation of a detector-independent vertex
reconstruction toolkit and interface to generic objects (VERTIGO). The first stage aims at re-
using existing state-of-the-art algorithms for geometric vertex finding and fitting by both linear
(Kalman filter) and robust estimation methods. Prototype candidates for the latter are a wide
range of adaptive f
... More
Presented by Mr. W. WALTENBERGER
on
30 Sep 2004
at
10:00
CMS and others LHC experiments offer a new challenge for the vertex reconstruction:
the elaboration of efficient algorithms at high-luminosity beam collisions. We
present here a new algorithm in the vertex finding field : Deterministic Annealing
(DA). This algorithm comes from information theory by analogy to statistical physics
and has already been used in clustering and classification proble
... More
Presented by Dr. E. CHABANAT
on
30 Sep 2004
at
10:00
This presentation describes the experiences and the
lessons learned by the RHIC/ATLAS Computing Facility
(RACF) in building and managing its 2,700+ CPU (and growing)
Linux Farm over the past 6+ years. We describe how
hardware cost, end-user needs, infrastructure,
footprint, hardware configuration, vendor selection,
software support and other considerations have
played a role in the p
... More
Presented by Tomasz WLODEK
on
27 Sep 2004
at
14:20
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
As a PPDG cross-team joint project, we proposed to study, develop,
implement and evaluate a set of tools that allow Meta-Schedulers to
take advantage of consistent information (such as information needed
for complex decision making mechanisms) across both local and/or Grid
Resource Management Systems (RMS).
We will present and define the requirements and schema by which one
can consi
... More
Presented by E. EFSTATHIADIS
on
30 Sep 2004
at
17:50
A simultaneous track finding / fitting procedure based on Kalman
filtering approach has been developed for the forward muon spectrometer of
ALICE experiment.
In order to improve the performance of the method in high-background
conditions of the heavy ion collisions the "canonical" Kalman filter has
been modified and supplemented by a "smoother" part. It is shown that
the resulting "ex
... More
on
30 Sep 2004
at
10:00
The main objective of the MathLib project is to give expertise and support to the LHC
experiments on mathematical and statistical computational methods. The aim
is to provide a coherent set of mathematical libraries. Users of this set of
libraries are developers of experiment reconstruction and simulation software,
of analysis tools frameworks, such as ROOT, and physicists performing data an
... More
Presented by L. MONETA
on
30 Sep 2004
at
15:20
By 2008, the T0/T1 centre for the LHC at CERN is estimated to use
about 5000 TB of disk storage. This is a very significant increase
over the about 250 TB running now. In order to be affordable, the
chosen technology must provide the required performance and at the
same time be cost-effective and easy to operate and use.
We will present an analysis of the cost (both in terms of material
an
... More
Presented by H. MEINHARD
on
29 Sep 2004
at
14:40
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
In March-April 2004 the CMS experiment undertook a Data Challenge(DC04).
During the previous 8 months CMS undertook a large simulated event
production. The goal of the challenge was to run CMS reconstruction for
sustained period at 25Hz input rate, distribute the data to the CMS Tier-1
centers and analyze them at remote sites. Grid environments developed in
Europe by the LHC Computing Gr
... More
Presented by A. FANFANI
on
29 Sep 2004
at
15:00
The scalable serving of shared filesystems across large clusters of computing resources continues to be a
difficult problem in high energy physics computing. The US CMS group at Fermilab has performed a detailed
evaluation of hardware and software solutions to allow filesysystem access to data from computing systems.
The goal of the evaluation was to arrive at a solution that was able to m
... More
Presented by L. LISA GIACCHETTI
on
28 Sep 2004
at
10:00
Extensive and thorough testing of the EGEE middleware is essential to ensure that
a production quality Grid can be deployed on a large scale as well as
across the broad range of heterogeneous resources that make up the hundreds of
Grid computing centres both in Europe and worldwide.
Testing of the EGEE middleware encompasses the tasks of both verification and
validation. In adition we te
... More
Presented by L. GUY
on
29 Sep 2004
at
10:00
The Logging and Bookkeeping service tracks job passing through the Grid. It collects
important events generated by both the grid middleware components and
applications, and processes them at a chosen L&B server to provide the job
state. The events are transported through secure reliable channels. Job
tracking is fully distributed and does not depend on a single information
source, the robust
... More
Presented by L. MATYSKA
on
29 Sep 2004
at
10:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
We show how nowadays it is possible to achieve the goal of accuracy and fast computation response in radiotherapic dosimetry using Monte Carlo
methods, together with a distributed computing model.
Monte Carlo methods have never been used in clinical practice because, even if they are more accurate than available commercial software, the
calculation time needed to accumulate sufficient statis
... More
Presented by M.G. PIA
on
29 Sep 2004
at
10:00
There is a permanent quest for user friendliness in HEP Analysis. This
growing need is directly proportional to the analysis frameworks'
interface complexity. In fact, the user is provided with an analysis
framework that makes use of a General Purpose Language to program the
query algorithms. Usually the user finds this overwhelming, since he
or she is presented with the complexity of the in
... More
Presented by V M. MOREIRA DO AMARAL
on
30 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
As part of the ATLAS Data Challenges 2 (DC2), an automatic production system was
introduced and with it a new data management component.
The data management tools used for previous Data Challenges were built as separate
components from the existing Grid middleware. These tools relied on a database of its
own which acted as a replica catalog.
With the extensive use of Grid technology expec
... More
Presented by M. BRANCO
on
27 Sep 2004
at
14:00
The algorithms for the detection of gravitational waves are usually very complex
due to the low signal to noise ratio. In particular the search for signals coming
from coalescing binary systems can be very demanding in terms of computing power,
like in the case of the classical Standard Matched Filter Technique. To overcome
this problem, we tested a Dynamic Matched Filter Technique, still
... More
Presented by Dr. S. PARDI
on
30 Sep 2004
at
10:00
The European Grid Research vision as set out in the Information
Society Technologies Work Programmes of the EU's Sixth Research
Framework Programme is to advance, consolidate and mature Grid
technologies for widespread e-science, industrial, business and
societal use. A batch of Grid research projects with 52 Million EUR EU
support was launched during the European Grid Technology Days 15 - 17
... More
Presented by Max LEMKE
on
28 Sep 2004
at
12:30
Today and in the future businesses need an intelligent network.
And Enterasys has the smarter solution. Our active network uses a combination of
context-based and embedded security technologies -
as well as the industry’s first automated response capability
- so it can manage who is using your network.
Our solution also protects the entire enterprise - from the
edge, through the distribu
... More
Presented by J. ROESE
on
29 Sep 2004
at
11:30
In the evolution of computational grids, security threats were overlooked in the
desire to implement a high performance distributed computational system. But now
the growing size and profile of the grid require comprehensive security solutions
as they are critical to the success of the endeavour. A comprehensive security
system, capable of responding to any attack on grid resources, is ind
... More
Presented by S. NAQVI
on
29 Sep 2004
at
14:00
The event data model (EDM) of the ATLAS experiment is presented. For large
collaborations like the ATLAS experiment common interfaces and data objects
are a necessity to insure easy maintenance and coherence of the experiments
software platform over a long period of time. The ATLAS EDM improves
commonality across the detector subsystems and subgroups such as trigger, test
beam reconstru
... More
Presented by Edward MOYSE
on
29 Sep 2004
at
16:50
HEP analysis is an iterative process. It is critical that in each iteration the physicist's analysis job accesses the
same information as previous iterations (unless explicitly told to do otherwise). This becomes problematic
after the data has been reconstructed several times. In addition, when starting a new analysis, physicists
normally want to use the most recent version of reconstruct
... More
Presented by C. JONES
on
29 Sep 2004
at
16:30
Today's computers are roughly a factor of one billion less efficient at doing their
job than the laws of fundamental physics state that they could be. How much of this
efficiency gain will we actually be able to harvest? What are the biggest obstacles
to achieving many orders of magnitude improvement in our computing hardware, rather
that the roughly factor of two we are used to seeing w
... More
Presented by Stan WILLIAMS
on
29 Sep 2004
at
11:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
LCG-2 is the collective name for the set of middleware released for
use on the LHC Computing Grid in December 2003. This middleware,
based on LCG-1, had already several improvements in the Data
Management area. These included the introduction of the Grid File
Access Library(GFAL), a POSIX-like I/O Interface, along with MSS
integration via the Storage Resource Manager(SRM)interface.
L
... More
Presented by J-P. BAUD
on
27 Sep 2004
at
15:40
In a Grid environment, the access to information on system resources is a necessity
in order to perform common tasks such as matching job requirements with available
resources, accessing files or presenting monitoring information. Thus both
middleware service, like workload and data management, and applications, like
monitoring tools, requiere an interface to the Grid information service w
... More
Presented by P. MENDEZ LORENZO
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
Most of the simulated events for the DZero experiment at Fermilab have been
historically produced by the “remote” collaborating institutions. One of the
principal challenges reported concerns the maintenance of the local software
infrastructure, which is generally different from site to site. As the understanding
of the community on distributed computing over distributively owned and share
... More
Presented by Rob KENNEDY
on
29 Sep 2004
at
15:20
As modern High Energy Physics (HEP) experiments require more
distributed computing power to fulfill their demands, the need for
an efficient distributed online services for control, configuration
and monitoring in such experiments becomes increasingly important.
This paper describes the experience of using standard Common Object
Request Broker Architecture (CORBA) middleware for providin
... More
Presented by S. KOLOS
on
28 Sep 2004
at
10:00
This paper describes the deployment and configuration of the
production system for ATLAS Data Challenge 2 starting in May 2004,
at Brookhaven National Laboratory, which is the Tier1 center in
the United States for the International ATLAS experiment. We will
discuss the installation of Windmill (supervisor) and Capone (executor)
software packages on the submission host and the relevant securit
... More
Presented by X. ZHAO
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
This presentation will summarise the deployment experience gained
with POOL during the first larger LHC experiments data challenges
performed. In particular we discuss the storage access
performance and optimisations, the integration issues with grid
middleware services such as the LCG Replica Location Service
(RLS) and the LCG Replica Manager and experience with the POOL
proposed way
... More
Presented by Maria GIRONE
on
29 Sep 2004
at
14:00
A sizeable increase in the machine luminosity of KEKB accelerator is expected in
coming years. This may result in a shortage in the data storage resource for the Belle
experiment in the near future and it is desired to reduce the data flow as much as
possible before writing the data to the storage device.
For this purpose, a realtime event reconstruction farm has been installed in the
Belle
... More
Presented by R. ITOH
on
29 Sep 2004
at
14:00
The adoption of a rigorous software process is well known to represent a key factor
for the quality of the software product and the most effective
usage of the human resources available to a software project.
The Unified Process, in particular its commercial packaging known as the RUP
(Rational Unified Process) has been one of the most widely used
software process models in the software i
... More
Presented by M.G. PIA
on
30 Sep 2004
at
10:00
The NGOP Monitoring Project at FNAL has developed a package which has demonstrated
the capability to efficiently monitor tens of thousands of entities on thousands of
hosts, and has been in operation for over 4 years. The project has met the majority
of its initial reqirements, and also the majority of the requirements discovered
along the way. This paper will describe what worked, and wha
... More
Presented by J. FROMM
on
28 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The NorduGrid middleware, ARC, has integrated support for querying and
registering to Data Indexing services such as the Globus Replica Catalog
and Globus Replica Location Server. This support allows one to use these
Data Indexing services for for example brokering during job-submission,
automatic registration of files and many other things. This
integrated support is complemented by a set of
... More
Presented by O. SMIRNOVA
on
27 Sep 2004
at
15:20
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The ARDA project was started in April 2004 to support
the four LHC experiments (ALICE, ATLAS, CMS and LHCb)
in the implementation of individual
production and analysis environments based on the EGEE middleware.
The main goal of the project is to allow a fast feedback between the
experiment and the middleware development teams via the
construction and the usage of end-to-end prototypes
al
... More
Presented by Birger KOBLITZ
on
29 Sep 2004
at
15:00
The management of Application and Experiment Software represents a very
common issue in emerging grid-aware computing infrastructures.
While the middleware is often installed by system administrators at a site
via customized tools that serve also for the centralized management of
the entire computing facility, the problem of installing, configuring and
validating Gigabytes of Virtual Organiza
... More
Presented by R. SANTINELLI
on
29 Sep 2004
at
10:00
The Electron Gamma Shower (EGS) Code System at SLAC is designed to simulate the flow
of electrons, positrons and photons through matter at a wide range of energies. It
has a large user base among the high-energy physics community and is often used as a
teaching tool through a Web interface that allows program input and output. Our work
aims to improve the user interaction and shower visual
... More
Presented by B. WHITE
on
30 Sep 2004
at
10:00
An object-oriented FAst MOnte-Carlo Simulation (FAMOS) has recently been developed
for CMS to allow rapid analyses of all final states envisioned at the LHC while
keeping a high degree of accuracy for the detector material description and the
related particle interactions. For example, the simulation of the material effects in
the tracker layers includes charged particle energy loss by ionizat
... More
Presented by Dr. F. BEAUDETTE
on
27 Sep 2004
at
14:20
Typical central Au-Au collision in the CBM experiment (GSI, Germany) will produce up
to 700 tracks in the inner tracker. Large track multiplicity together with presence
of nonhomogeneous magnetic field make reconstruction of events complicated.
A cellular automaton method is used to reconstruct tracks in the inner tracker. The
cellular automaton algorithm creates short track segments in n
... More
Presented by I. KISEL
on
30 Sep 2004
at
14:20
We present a set of algorithms for fast pattern recognition and track
reconstruction using 3D space points aimed for the High Level
Triggers (HLT) of multi-collision hadron collider environments. At
the LHC there are several interactions per bunch crossing separated
along the beam direction, z. The strategy we follow is to (a)
identify the z-position of the interesting interaction prior t
... More
Presented by Dr. N. KONSTANTINIDIS
on
29 Sep 2004
at
15:40
The BTeV experiment, a proton/antiproton collider experiment at the Fermi National
Accelerator Laboratory, will have a trigger that will perform complex computations
(to reconstruct vertices, for example) on every collision (as opposed to the more
traditional approach of employing a first level hardware based trigger). This
trigger requires large-scale fault adaptive embedded software: with
... More
Presented by P. SHELDON
on
29 Sep 2004
at
14:40
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
A large number of Grids have been developed, motivated by
geo-political or application requirements. Despite being mostly based
on the same underlying middleware, the Globus Toolkit, they are
generally not inter-operable for a variety of reasons. We present a
method of federating those disparate grids which are based on the
Globus Toolkit, together with a concrete example of interfacing the
... More
Presented by R. WALKER
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The LHCb experiment needs to store all the information about the datasets and their
processing history of recorded data resulting from particle collisions at the LHC
collider at CERN as well as of simulated data.
To achieve this functionality a design based on data warehousing techniques was
chosen, where several user-services can be implemented and optimized individually
without losing
... More
Presented by C. CIOFFI
on
27 Sep 2004
at
17:30
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
A high performance system has been assembled using standard web components to deliver
database information to a large number (thousands?) of broadly distributed clients.
The CDF Experiment at Fermilab is building processing centers around the world
imposing a high demand load on their database repository. For delivering read-only
data, such as calibrations, trigger information and run condit
... More
Presented by L. LUEKING
on
27 Sep 2004
at
14:40
The STAR Collaboration is currently using simulation software
based on Geant 3. The emergence of the new Monte Carlo
simulation packages, coupled with evolution of both STAR
detector and its software, requires a drastic change of
the simulation framework.
We see the Virtual Monte Carlo (VMC) approach as providing
a layer of abstraction that facilitates such transition.
The VMC platform is
... More
Presented by M. POTEKHIN
on
29 Sep 2004
at
15:00
We describe a Java toolkit for full event reconstruction and analysis. The toolkit
is currently being used for detector design and physics analysis for a future
linear e+ e- linear collider. The components are fully modular and are available
for tasks from digitization of tracking detector signals through to cluster
finding, pattern recognition, fitting, jetfinding, and analysis. We discus
... More
Presented by N. GRAF
on
30 Sep 2004
at
14:40
In 1995 I predicted that the dual-processor PC would start invading HEP computing and
a couple of years later the x86-based PC was omnipresent in our computing facilities.
Today, we cannot imagine HEP computing without thousands of PCs at the heart.
This talk will look at some of the reasons why we may one day be forced to leave this
sweet-spot. This would be not because we (the HEP community)
... More
Presented by S. JARP
on
28 Sep 2004
at
10:00
A key feature of Grid systems is the sharing of its resources among
multiple Virtual Organizations (VOs). The sharing process needs a
policy framework to manage the resource access and usage. Generally
Policy frameworks exist for farms or local systems only, but now, for
Grid environments, a general, and distributed policy system is
necessary.
Generally VOs and local systems have contr
... More
on
29 Sep 2004
at
17:50
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
Computational and data grids are now entering a more mature phase where experimental
test-beds are turned into production quality infrastructures operating around the
clock. All this is becoming true both at national level, where an example is the
Italian INFN production grid (http://grid-it.cnaf.infn.it), and at the continental
level, where the most strinking example is the European Union EGE
... More
Presented by R. BARBERA
on
29 Sep 2004
at
10:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
GROSS (GRidified Orca Submission System) has been developed to provide CMS
end users with a single interface for running batch analysis tasks over
the LCG-2 Grid. The main purpose of the tool is to carry out job
splitting, preparation, submission, monitoring and archiving in a
transparent way which is simple to use for the end user. Central to its
design has been the requirement for allowing
... More
Presented by H. TALLINI
on
29 Sep 2004
at
10:00
The study of the effects of space radiation on astronauts in an important concern of
space missions for the exploration of the Solar System. The radiation hazard to crew
is critical to the feasibility of interplanetary manned missions.
To protect the crew, shielding must be designed, the environment must be
anticipated and monitored, and a warning system must be put in place.
A Geant4 s
... More
Presented by S. GUATELLI
on
30 Sep 2004
at
10:00
Geant4 is relied upon in production for increasing number of HEP
experiments and for applications in several other fields. Its
capabilities continue to be extended, as its performance and
modelling are enhanced.
This presentation will give an overview of recent developments in
diverse areas of the toolkit. These will include, amongst others,
the optimisation for complex setups usi
... More
Presented by Dr. J. APOSTOLAKIS
on
27 Sep 2004
at
15:20
Most HENP experiment software includes a logging or tracing API allowing for
displaying in a particular format important feedback coming from the core
application. However, inserting log statements into the code is a low-tech method
for tracing the program execution flow and often leads to a flood of messages in
which the relevant ones are occluded. In a distributed computing environment,
... More
Presented by V. FINE
on
29 Sep 2004
at
10:00
Genetic programming is a machine learning technique, popularized by Koza in
1992, in which computer programs which solve user-posed problems are
automatically discovered. Populations of programs are evaluated for their
fitness of solving a particular problem. New populations of ever increasing
fitness are generated by mimicking the biological processes underlying
evolution. These processes ar
... More
Presented by E. VAANDERING
on
30 Sep 2004
at
18:10
Gfarm v2 is designed for facilitating reliable file sharing and
high-performance distributed and parallel data computing in a Grid
across administrative domains by providing a Grid file system. A
Grid
file system is a virtual file system that federates multiple file
systems. It is possible to share files or data by mounting the
virtual file system. This paper discusses the design and
im
... More
Presented by O. TATEBE
on
27 Sep 2004
at
17:10
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The ALICE experiment and the ROOT team have developed a Grid-enabled version of PROOF that allows
efficient parallel processing of large and distributed data samples. This system has been integrated with the
ALICE-developed AliEn middleware. Parallelism is implemented at the level of each local cluster for efficient
processing and at the Grid level, for optimal workload management of distrib
... More
Presented by F. RADEMAKERS
on
29 Sep 2004
at
15:20
For very large projects like the LHC Computing Grid Project (LCG) involving 8,000
scientists from all around the world, it is an indispensable requirement to have a
well organized user support. The Institute for Scientific Computing at the
Forschungszentrum Karlsruhe started implementing a Global Grid User Support (GGUS)
after official assignment of the Grid Deployment Board in March 2003.
... More
Presented by T. ANTONI
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
To maximize the physics potential of the data currently being taken, the CDF collaboration at Fermi National
Accelerator Laboratory has started to deploy user analysis computing facilities at several locations throughout
the world. Over 600 users are signed up and able to submit their physics analysis and simulation applications
directly from their desktop or laptop computers to these facil
... More
Presented by A. SILL
on
30 Sep 2004
at
18:10
The GSI online-offline analysis system Go4 is a ROOT based framework for medium
energy ion- and nuclear physics experiments. Its main features are a multithreaded
online mode with a non-blocking Qt GUI, and abstract user interface classes to set
up the analysis process itself which is organised as a list of subsequent analysis
steps. Each step has its own event objects and a processor inst
... More
Presented by H. ESSEL
on
27 Sep 2004
at
15:40
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
The installation and configuration of LCG middleware, as it is currently being done,
is complex and delicate.
An “accurate” configuration of all the services of LCG middleware requires a deep
knowledge of the inside dynamics and hundreds of parameters to be dealt with. On the
other hand, the number of parameters and flags that are strictly needed in order to
run a working ”default
... More
Presented by A. RETICO
on
29 Sep 2004
at
10:00
GraXML is the framework for manipulation and visualization of 3D geometrical
objects in space. The full framework consists of the GraXML toolkit, libraries
implementing Generic and Geometric Models and end-user interactive front-ends.
GraXML Toolkit provides a foundation for operations on 3D objects (both detector
elements and events). Each external source of 3D data is automatically
translat
... More
Presented by J. HRIVNAC
on
30 Sep 2004
at
10:00
In this talk, we will discuss the future of storage systems. In particular, we will
focus on several big challenges which we are facing in storage, such as being able
to build, manage and backup really massive storage systems, being able to find
information of interest, being able to do long-term archival of data, and so on. We
also present ideas and research being done to address these ch
... More
Presented by Jai MENON
on
29 Sep 2004
at
09:30
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
Nuclear and High Energy Physics experiments such as STAR at BNL are
generating millions of files with PetaBytes of data each year. In
most cases, analysis programs have to read all events in a file in
order to find the interesting ones.
Since most analyses are only interested in some subsets of events in
a number of files, a significant portion of the computer time is
wasted on readi
... More
Presented by K. WU
on
30 Sep 2004
at
17:10
This paper reports on the deployment experience of the defacto grid
information system, Globus MDS, in a large scale production grid. The
results of this experience led to the development of an information
caching system based on a standard openLDAP database. The paper then
describes how this caching system was developed further into
a production quality information system including a gen
... More
Presented by L. FIELD
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
In this paper we report on the implementation of an early prototype
of distributed high-level services supporting grid-enabled data
analysis within the LHC physics community as part of the ARDA project
within the context of the GAE (Grid Analysis Environment) and begin
to investigate the associated complex behaviour of such an
end-to-end system. In particular, the prototype integrates a
... More
Presented by F. VAN LINGEN
on
30 Sep 2004
at
15:40
The aim of Grid computing is to enable the easy and open sharing of resources
between large and highly distributed communities of scientists and institutes across
many independent administrative domains. Convincing site security officers and
computer centre managers to allow this to happen in view of today's ever-increasing
Internet security problems is a major challenge. Convincing users
... More
Presented by David KELSEY
on
28 Sep 2004
at
11:30
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
Grid computing involves the close coordination of many different sites which offer
distinct computational and storage resources to the Grid user community. The
resources at each site need to be monitored continuously. Static and dynamic site
information need to be presented to the user community in a simple and efficient
manner.
This paper will present both the design and implementation
... More
Presented by M. MAMBELLI, B K. KIM
on
30 Sep 2004
at
15:40
The U.S. Trillium Grid projects in collaboration with High Energy Experiment groups
from the Large Hadron Collider (LHC), ATLAS and CMS, Fermi-Lab's BTeV, members of
the LIGO , SDSS collaborations and groups from other scientific disciplines and
computational centers have deployed a multi-VO, application-driven grid laboratory
("Grid3"). The grid laboratory has sustained for several months
... More
on
28 Sep 2004
at
09:30
This talk gives a brief overview of recent development of high
performance computing and Grid initiatives in the Nordic region. Emphasis
will be placed on the technology and policy demands posed by the integration
of general purpose supercomputing centers into Grid environments. Some of
the early experiences of bridging national eBorders in the Nordic region
will also be presented.
Rather t
... More
Presented by Bo Anders YNNERMAN
on
30 Sep 2004
at
11:00
Designing a usable, visually-attractive GUI is somewhat more difficult than it
appears at a first glance. The users, the GUI designers and the programmers are three
important parts involved in this process and everyone has a comprehensive view on the
aspects of the application goals, as well as the steps that have to be taken to meet
successfully the application requirements. The fundamental G
... More
Presented by I. ANTCHEVA
on
30 Sep 2004
at
14:00
During the years 2000 and 2001 the HERA machine and the H1
experiment performed substantial luminosity upgrades. To cope with
the increased demands on data handling an effort was made to
redesign and modernize the analysis software. Main goals were to
lower turn-around time for physics analysis by providing a single
framework for data storage, event selection, physics analysis and
even
... More
Presented by Dr. J. KATZY
on
29 Sep 2004
at
17:50
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The European DataGrid (EDG) project ran from 2001 to 2004, with the aim of producing
middleware which could form the basis of a production Grid, and of running a testbed
to demonstrate the middleware. HEP experiments (initially the four LHC experiments
and subsequently BaBar and D0) were involved from the start in specifying
requirements, and subsequently in evaluating the performance of t
... More
Presented by S. BURKE
on
27 Sep 2004
at
16:30
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
Project SETI@HOME has proven to be one of the biggest successes of
distributed computing during the last years. With a quite simple
approach SETI manages to process huge amounts of data using a vast
amount of distributed computer power.
To extend the generic usage of these kinds of distributed computing
tools, BOINC (Berkeley Open Infrastructure for Network Computing) is
being developed. I
... More
on
30 Sep 2004
at
14:00
A High Energy Physics experiment has between 200 and 1000 collaborating physicists
from nations spanning the entire globe. Each collaborator brings a unique
combination of interests, and each has to search through the same huge heap of
messages, research results, and other communication to find what is useful.
Too much scientific information is as useless as too little. It is time consumi
... More
Presented by Mr. G. ROEDIGER
on
30 Sep 2004
at
17:30
The migration of the Harp data and software from an Objectivity-
based
to an Oracle-based data storage solution is reviewed in this
presentation.
The project, which was successfully completed in January 2004,
involved three distinct phases. In the first phase, which profited
significantly from the previous COMPASS data migration project,
30 TB of Harp raw event data were migrated in two w
... More
Presented by A. VALASSI
on
30 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
SAM was developed as a data handling system for Run II at Fermilab. SAM is a
collection of services, each described by metadata. The metadata are modeled on a
relational database, and implemented in ORACLE. SAM, originally deployed in
production for the D0 Run II experiment, has now been also deployed at CDF and is
being commissioned at MINOS. This illustrates that the metadata decompositi
... More
on
29 Sep 2004
at
16:30
In the past year, BaBar has shifted from using Objectivity to using ROOT I/O
as the basis for our primary event store. This shift required a total
reworking of Kanga, our ROOT-based data storage format. We took advantage
of this opportunity to ease the use of the data by supporting multiple
access modes that make use of many of the analysis tools available in
ROOT.
Specifically, our new e
... More
Presented by Dr. M. STEINKE
on
29 Sep 2004
at
17:10
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
Presented by Richard MOUNT
on
29 Sep 2004
at
17:10
This paper describes recent developments in the IGUANA (Interactive Graphics for User
ANAlysis) project. IGUANA is a generic framework and toolkit, used by CMS and D0, to
build a variety of interactive applications such as detector and event visualisation
and interactive GEANT3 and GEANT4 browsers.
IGUANA is a freely available toolkit based on open-source components including Qt,
OpenInvent
... More
Presented by S. MUZAFFAR
on
30 Sep 2004
at
15:00
CHEP 2004 conference is using the Integrated Digital Conferencing
product to manage part of its web site and processes to run the
conference.
This software has been built in the framework of InDiCo European
Project. It is designed to be generic and extensible with the goal of
providing help for single seminars as well as large conferences
management. Partly developped at CERN within the
... More
Presented by T. BARON
on
30 Sep 2004
at
10:00
Session:
INTAS
INTAS ( http://www.intas.be): International Association for the
promotion of co-operation with scientists from the New Independent
States of the former Soviet Union (NIS). INTAS encourages joint
activities between its INTAS Members and the NIS in all exact and
natural sciences, economics, human and social sciences.
INTAS supports a number of NIS participants to attend the 2004
Computi
... More
on
30 Sep 2004
at
16:30
IceCube is a cubic kilometer-scale neutrino telescope under construction at the South
Pole. The minimalistic nature of the instrument poses several challenges for the
software framework. Events occur at random times, and frequently overlap, requiring
some modifications of the standard event-based processing paradigm. Computational
requirements related to modeling the detector medium necessi
... More
Presented by T. DEYOUNG
on
27 Sep 2004
at
17:50
A fundamental part of software development is to detect and analyse weak spots of the programs to guide
optimisation efforts. We present a brief overview and usage experience on some of the most valuable open-
source tools such as valgrind and oprofile. We describe their main strengths and weaknesses as experienced
by the CMS experiment.
As we have found that these tools do not satisfy all
... More
Presented by G. EULISSE
on
30 Sep 2004
at
18:10
The ATLAS experiment at the Large Hadron Collider (LHC) will face the challenge of
efficiently selecting interesting candidate events in pp collisions at 14 TeV center-
of-mass energy, whilst rejecting the enormous number of background events, stemming
from an interaction rate of about 10^9 Hz. The Level-1 trigger will reduce the
incoming rate to around O(100 kHz). Subsequently, the High-L
... More
Presented by Manuel DIAS-GOMEZ
on
29 Sep 2004
at
16:30
The HEP experiments that use the regional center GridKa will handle
large amounts of data. Traditional access methods via local disks or
large network storage servers show limitations in size, throughput or
data management flexibility.
High speed interconnects like Fibre Channel, iSCSI or Infiniband as
well as parallel file systems are becoming increasingly important in
large cluster insta
... More
Presented by J. VANWEZEL
on
27 Sep 2004
at
16:50
As Fermilab's representatives to the C++ standardization effort, we have
been promoting directions of special interest to the physics community.
We here report on selected recent developments toward the next revision
of the C++ Standard. Topics will include standardization of random
number and special function libraries, as well as core language issues
promoting improved run-time performance.
... More
Presented by M. PATERNO
on
30 Sep 2004
at
08:30
The "gridification" of a computing farm is usually a complex and time consuming task.
Operating system installation, grid specific software, configuration files
customization can turn into a large problem for site managers.
This poster introduces InGRID, a solution used to install and maintain grid software
on small/medium size computing farms.
Grid elements installation with InGRID consists
... More
Presented by F.M. TAURINO
on
28 Sep 2004
at
10:00
Distributed physics analysis techniques as provided by the rootd
and proofd concepts require a fast and efficient interconnect between
the nodes. Apart from the required bandwidth the latency of message
transfers is important, in particular in environments with many nodes.
Ethernet is known to have large latencies, between 30 and 60 micro seconds for
the common Giga-bit Ethernet.
The Inf
... More
Presented by A. HEISS
on
29 Sep 2004
at
15:40
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The R-GMA (Relational Grid Monitoring Architecture) was developed within the EU
DataGrid project, to bring the power of SQL to an information and monitoring system
for the grid. It provides producer and consumer services to both publish and
retrieve information from anywhere within a grid environment. Users within a
Virtual Organization may define their own tables dynamically into which
... More
on
30 Sep 2004
at
15:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
DESY is one of the world-wide leading centers for research with particle
accelerators and a center for research with synchrotron light.
The hadron-electron collider HERA houses four experiments which are taking
data and will be operated until 2006 at least.
The computer center manages a data volumes of order 1 PB and is the home
for around 1000 CPUs.
In 2003 DESY started to set up a Gri
... More
Presented by A. GELLRICH
on
29 Sep 2004
at
10:00
These are several on-going experiments at IHEP, such as BES, YBJ, and CMS
collaboration with CERN. each experiment has its own computing system, these
computing systems run separately. This leads to a very low CPU utilization due
to different usage period of each experiment. The Grid technology is a very
good candidate for integrating these separate computing systems into a "single
image
... More
Presented by G. SUN
on
28 Sep 2004
at
10:00
The ATLAS collaboration had a Combined Beam Test from May until
October 2004. Collection and analysis of data required integration
of several software systems that are developed as prototypes for
the ATLAS experiment, due to start in 2007. Eleven different detector
technologies were integrated with the Data Acquisition system and were
taking data synchronously. The DAQ was integrated with
... More
Presented by M. DOBSON
on
27 Sep 2004
at
17:50
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The aim of the service is to allow fully distributed analysis of large volumes of
data while maintaining true (sub-second) interactivity. All the Grid related
components are based on OGSA style Grid services, and to the maximum extent uses
existing Globus Toolkit 3.0 (GT3) services. All transactions are authenticated and
authorized using GSI (Grid Security Infrastructure) mechanism - part
... More
Presented by T. JOHNSON
on
30 Sep 2004
at
17:30
The transportation of ions in matter is subject of much interest in not only
high-energy ion-ion collider experiments such as RHIC and LHC but also many
other field of science, engineering and medical applications. Geant4 is a tool
kit for simulation of passage of particles through matter and its OO designs
makes it easy to extend its capability for ion transports. To simulate ions
inter
... More
Presented by Dr. T. KOI
on
27 Sep 2004
at
17:10
JASSimApp is joint project of SLAC, KEK, and Naruto University to create integrated
GUI for Geant4, based on JAS3 framework, with ability to interactively:
- Edit Geant4 geometry, materials, and physics processes
- Control Geant4 execution, local and remote: pass commands and
receive output, control event loop
- Access AIDA histograms defined in Geant4
- Show generated Gea
... More
Presented by V. SERBO
on
30 Sep 2004
at
17:50
JIM (Job and Information Management) is a grid extension to the mature data handling
system called SAM (Sequential Access via Metadata) used by the CDF, DZero and Minos
Experiments based at Fermilab. JIM uses a thin client to allow job submissions from
any computer with Internet access, provided the user has a valid certificate or
kerberos ticket. On completion the job output can be download
... More
Presented by M. BURGON-LYON
on
29 Sep 2004
at
10:00
A general overview of the Jefferson Lab data acquisition run control system is presented.
This run control system is designed to operate the configuration, control, and
monitoring of all Jefferson Lab experiments. It controls data-taking activities by
coordinating the operation of DAQ sub-systems, online software components and
third-party software such as external slow control systems.
The m
... More
Presented by V. GYURJYAN
on
29 Sep 2004
at
16:30
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
In the context of Interactive Grid-Enabled Analysis Environment
(GAE), physicists desire bi-directional interaction with the job
they submitted. In one direction, monitoring information about the
job and hence a “progress bar” should be provided to them. On other
direction, physicist should be able to control their jobs. Before
submission, they may direct the job to some specified re
... More
Presented by A. ANJUM
on
29 Sep 2004
at
10:00
Grid is emerging as a great computational resource but its dynamic behaviour makes
the Grid environment unpredictable. System failure or network failure can occur or
the system performance can degrade. So once the job has been submitted monitoring
becomes very essential for user to ensure that the job is completed in an efficient
way. In current environments once user submits a job he lose
... More
Presented by A. ANJUM
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The PHENIX collaboration records large volumes of data for each
experimental run (now about 1/4 PB/year). Efficient and timely
analysis of this data can benefit from a framework for distributed
analysis via a growing number of remote computing facilities in the
collaboration. The grid architecture has been, or is being deployed
at most of these facilities.
The experience being obtained
... More
Presented by A. SHEVEL
on
27 Sep 2004
at
18:10
In a wide-area distributed and heterogeneous grid environment, monitoring
represents an important and crucial task. It includes system status checking,
performance tuning, bottlenecks detecting, troubleshooting, fault notifying. In
particular a good monitoring infrastructure must provide the information to
track down the current status of a job in order to locate any problems. Job
monitoring
... More
Presented by G. DONVITO, G. TORTONE
on
29 Sep 2004
at
10:00
The infn.it AFS cell has been providing a useful single file-space and authentication mechanism for the whole
INFN, but the lack of a distributed management system, has lead several INFN sections and LABs to setup local
AFS cells. The hierarchical transitive cross-realm authentication introduced in the Kerberos 5 protocol and the
new versions of the OpenAFS and MIT implementation of Kerberos
... More
Presented by E.M.V. FASANELLI
on
29 Sep 2004
at
10:00
The Conditions Database project has been launched
to implement a common persistency solution for experiment conditions data
in the context of the LHC Computing Grid (LCG) Persistency Framework.
Conditions data, such as calibration, alignment or slow control data,
are non-event experiment data characterized by the fact
that they vary in time and may have different versions.
The LCG project
... More
Presented by A. VALASSI
on
29 Sep 2004
at
18:10
In the framework of the LCG Simulation Project, we present the Generator
Services Sub-project, launched in 2003 under the oversight of the LHC Monte
Carlo steering group (MC4LHC). The goal of the Generator Services Subproject
is to guarantee the physics generator support for the LHC experiments. Work is
divided into four work packages: Generator library; Storage, event
interfaces and particle
... More
Presented by Dr. P. BARTALINI
on
27 Sep 2004
at
14:00
LCIO is a persistency framework and data model for the next linear
collider. Its original implementation, as presented at CHEP 2003,
was focused on simulation studies. Since then the data model has
been extended to also incorporate prototype test beam data,
reconstruction and analysis. The design of the interface has also
been simplified. LCIO defines a common abstract user interface
... More
Presented by F. GAEDE
on
29 Sep 2004
at
14:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
In this paper we present an overview of the implementation of the LCG
interface for the ATLAS production system. In order to take profit
of the features provided by DataGRID software, on which LCG is based,
we implemented a Python module, seamless integrated into the Workload
Management System, which can be used as an object-oriented API to the
submission services. On top of it we impl
... More
Presented by D. REBATTO
on
29 Sep 2004
at
10:00
Experiments frequently produce many small data files for reasons beyond their control, such as output
splitting into physics data streams, parallel processing on large farms, database technology incapable of
concurrent writes into a single file, and constraints from running farms reliably. Resulting data file size is
often far from ideal for network transfer and mass storage performance. Pro
... More
Presented by L. TUURA
on
29 Sep 2004
at
10:00
Advanced optical-based networks have the capacity and capability to meet the
extremely large data movement requirements of particle physics collaborations. To
date, research efforts in the advanced network area have been primarily been focused
on provisioning, dynamically configuring, and monitoring the wide area optical
network infrastructure itself. Application use of these facilities
... More
Presented by P. DEMAR
on
30 Sep 2004
at
16:50
As part of the DOE SciDAC "National Infrastructure for Lattice Gauge
Computing" project, Fermilab builds and operates production clusters for
lattice QCD simulations. We currently operate three clusters: a 128-node dual
Xeon Myrinet cluster, a 128-node Pentium 4E Myrinet cluster, and a 32-node
dual Xeon Infiniband cluster. We will discuss the operation of these systems
and examine their per
... More
Presented by Don PETRAVICK
on
27 Sep 2004
at
14:40
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The lattice gauge theory community produces large volumes of
data. Because the data produced by completed computations form the
basis for future work, the maintenance of archives of existing data
and metadata describing the provenance, generation parameters, and
derived characteristics of that data is essential not only as a
reference, but also as a basis for future work. Development of these
... More
Presented by E. NEILSEN
on
29 Sep 2004
at
16:50
The CLEO collaboration at the Cornell electron positron storage ring
CESR has completed its transition to the CLEO-c experiment. This new
program contains a wide array of Physics studies of $e^+e^-$
collisions at center of mass energies between 3 GeV and 5 GeV.
New challenges await the CLEO-c Online computing system, as the
trigger rates are expected to rise from < 100 Hz to around 300
... More
Presented by H. SCHWARTHOFF
on
28 Sep 2004
at
10:00
The design and optimization of the Computing Models for the future LHC experiments,
based on the Grid technologies, requires a realistic and effective modeling and
simulation of the data access patterns, the data flow across the local and wide area
networks, and the scheduling and workflow created by many concurrent, data intensive
jobs on large scale distributed systems.
This paper present
... More
Presented by I. LEGRAND
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The LHC needs to achieve reliable high performance access to vastly distributed storage resources across the
network. USCMS has worked with Fermilab-CD and DESY-IT on a storage service that was deployed at several
sites. It provides Grid access to heterogeneous mass storage systems and synchronization between them. It
increases resiliency by insulating clients from storage and network failu
... More
Presented by M. ERNST
on
27 Sep 2004
at
14:20
The Product Support (PS) group of the IT department at CERN distributes and
supports more than one hundred different software packages, ranging from tools
for computer aided design, field calculations, mathematical and structural
analysis to software development. Most of these tools, which are used on
a variety of Unix and Windows platforms by different user populations, are
commercial p
... More
Presented by N. HOEIMYR
on
28 Sep 2004
at
10:00
The External Software Service of the LCG SPI project provides
open source and public domain packages required by the LCG
projects and experiments. Presently, more than 50 libraries
and tools are provided for a set of platforms decided by the
architect forum. All packages are installed following a standard
procedure and are documented on the web.
A set of scripts has been developed to e
... More
Presented by E. POINSIGNON
on
30 Sep 2004
at
10:00
The CMS Geant4-based Simulation Framework, Mantis, is a specialization of the COBRA
framework, which implements the CMS OO architecture. Mantis, which is the basis for
the CMS-specific simulation program OSCAR, provides the infrastructure for the
selection, configuration and tuning of all essential simulation elements: geometry
construction, sensitive detector and magnetic field management, ev
... More
Presented by M. STAVRIANAKOU
on
30 Sep 2004
at
10:00
The University of Edinburgh has an significant interest in mass storage systems as it
is one of the core groups tasked with the roll out of storage software for the UK's
particle physics grid, GridPP. We present the results of a development project to
provide software interfaces between the SDSC Storage Resource Broker, the EU DataGrid
and the Storage Resource Manager. This project was undert
... More
Presented by S. THORN
on
29 Sep 2004
at
10:00
Network flow data gathered on border routers and core network switch/routers is used
at Fermilab for statistical analysis of traffic patterns, passive network monitoring,
and estimation of network performance characteristics. Flow data is also a critical
tool in the investigation of computer security incidents. Development and enhancement
of flow- based tools is on-going effort. The current s
... More
Presented by A. BOBYSHEV
on
28 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The aim of the EGEE (Enabling Grids for E-Science in Europe) is to
create a reliable and dependable European Grid infrastructure for
e-Science. The objective of the Middleware Re-engineering and Integration
Research Activity is to provide robust middleware components,
deployable on several platforms and operating systems, corresponding
to the core Grid services for resource access, data manag
... More
Presented by E. LAURE
on
29 Sep 2004
at
14:20
To benefit from substantial advancements in Open Source database
technology and ease deployment and development concerns with
Objectivity/DB, the Phenix experiment at RHIC is migrating its principal
databases from Objectivity to a relational database management system
(RDBMS). The challenge of designing a relational DB schema to store a
wide variety of calibration classes was
solved b
... More
Presented by I. SOURIKOVA
on
27 Sep 2004
at
16:30
There have been a number of efforts to develop use cases for the Grid
to guide development and useability testing. This talk examines the
value of "mis-use cases" for guiding the development of operational
controls and error handling. A couple of the more common current
network attack patterns will be extrapolated to a global Grid
environment. The talk will walk through the various activitie
... More
Presented by D. SKOW
on
29 Sep 2004
at
14:20
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The MonALISA (MONitoring Agents in A Large Integrated Services Architecture) system
is a scalable Dynamic Distributed Services Architecture which is based on the mobile
code paradigm.
An essential part of managing a global system, like the Grids, is a monitoring system
that is able to monitor and track the many site facilities, networks, and all the
task in progress, in real time. MonALISA
... More
Presented by I. LEGRAND
on
30 Sep 2004
at
16:30
The complexity of the CMS Tracker (more than 50 million channels to monitor) now in
construction in ten laboratories worldwide with hundreds of interested people , will
require new tools for monitoring both the hardware and the software. In our approach
we use both visualization tools and Grid services to make this monitoring possible.
The use of visualization enables us to represent in a
... More
Presented by G. ZITO
on
29 Sep 2004
at
10:00
Fermilab operates a petabyte scale storage system, Enstore, which is the
primary data store for experiments' large data sets. The Enstore system
regularly transfers greater than 15 Terabytes of data each day. It is designed using a
client-server architecture providing sufficient modularity to allow easy addition and
replacement of hardware and software components. Monitoring of this system
... More
Presented by E. BERMAN
on
29 Sep 2004
at
10:00
CDF is deploying a version of its analysis facility (CAF) at several globally
distributed sites. On top of the hardware at each of these sites is either an FBSNG
or Condor batch manager and a SAM data handling system which in some cases also
makes use of dCache.
The jobs which run at these sites also make use of a central database located at
Fermilab. Each of these systems has its own mon
... More
Presented by I. SFILIGOI
on
28 Sep 2004
at
10:00
We discuss techniques used to access legacy event generators from modern simulation
environments. Examples will be given of our experience within the linear collider
community accessing various FORTRAN-based generators from within a Java
environment. Coding to a standard interface and use of shared object libraries
enables runtime selection of generators, and allows for extension of the su
... More
Presented by N. GRAF
on
30 Sep 2004
at
10:00
High-energy physics experiments are currently recording large amounts of data and in a few years will be
recording prodigious quantities of data. New methods must be developed to handle this data and make
analysis at universities possible. Grid Computing is one method; however, the data must be cached at the
various Grid nodes. We examine some storage techniques that exploit recent develop
... More
Presented by D. SANDERS
on
29 Sep 2004
at
10:00
At LHC the 40 MHz bunch crossing rate dictates a high selectivity of the
ATLAS Trigger system, which has to keep the full physics potential of the
experiment in spite of a limited storage capability.
The level-1 trigger, implemented in a custom hardware, will reduce the
initial rate to 75 kHz and is followed by the software based level-2
and Event Filter, usually referred as High Level Tri
... More
Presented by Dr. M. BIGLIETTI
on
30 Sep 2004
at
10:00
The CMS detector has a sophisticated four-station muon system made up of tracking chambers (Drift Tubes,
Cathode Strip Chambers) and dedicated trigger chambers. A muon reconstruction software based on Kalman
filter techniques has been developed which reconstructs muons in the standalone muon system, using
information from all three types of muon detectors, and links the resulting muon tracks
... More
Presented by N. NEUMEISTER
on
30 Sep 2004
at
14:00
The Architectural Principles of the Internet have dominated the past decade.
Orthogonal to the telecommunications industry principles, they dramatically changed
the networking landscape because they relied on iconoclastic ideas. First, the
Internet end-to-end principle, which stipulates that the network should intervene
minimally on the end-to-end traffic, pushing the complexity to the end
... More
Presented by F. FLUCKIGER
on
30 Sep 2004
at
12:00
Management of large site network such as FNAL LAN presents many
technical and organizational challenges. This highly dynamic network
consists of around 10 thousand network nodes. The nature of the
activities FNAL is involved in and its computing policy
require that the network remains as open as reasonably possible
both in terms of connectivity to the outside networks and in with
respect to
... More
Presented by P. DEMAR
on
27 Sep 2004
at
16:30
Wide area networks of sufficient, and rapidly increasing end-to-end
capability are vital for every phase of high energy physicists' work.
Our bandwidth usage, and the typical capacity of the major national
backbones and intercontinental links used by our field have
progressed by a factor of more than 1000 over the past decade, and the
outlook is for a similar increase over the next decade
... More
Presented by H. NEWMAN
on
30 Sep 2004
at
14:00
At CHEP03 we introduced "Physics Analysis eXpert" (PAX), a C++ toolkit
for advanced physics analyses in High Energy Physics (HEP)
experiments. PAX introduces a new level of abstraction beyond detector
reconstruction and provides a general, persistent container model for
HEP events. Physics objects like fourvectors, vertices and collisions
can easiliy be stored, accessed and manipulated. Bookk
... More
Presented by A. SCHMIDT
on
30 Sep 2004
at
10:00
The Belle experiment has accumulated an integrated luminosity of more
than 240fb-1 so far, and a daily logged luminosity now exceeds 800pb-
1. These numbers correspond to more than 1PB of raw and processed
data stored on tape and an accumulation of the raw data at the rate
of 1TB/day. To meet these storage demands, a new cost effective,
compact hierarchical mass storage system has been co
... More
Presented by N. KATAYAMA
on
28 Sep 2004
at
10:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
The Belle experiment has accumulated an integrated
luminosity of more than 240fb-1 so far, and a daily logged
luminosity has exceeded 800pb-1. This requires more
efficient and reliable way of event processing. To meet
this requirement, new offline processing scheme has been
constructed, based upon technique employed for the Belle
online reconstruction farm. Event processing is performed
at
... More
Presented by I. ADACHI
on
29 Sep 2004
at
10:00
The Alice High Level Trigger (HLT) is foreseen to consist of a
cluster of 400 to 500 dual SMP PCs at the start-up of the
experiment. It's input data rate can be up to 25GB/s. This has to be
reduced to at most 1.2 GB/s before the data is sent to DAQ through
event selection, filtering, and data compression. For these
processing purposes, the data is passed through the cluster in
several
... More
Presented by T.M. STEINBECK
on
27 Sep 2004
at
14:00
Twisted trapezoids are important compontents in the LAr end cap calorimeter of the
Atlas detector. A similar solid, the so-called twisted tubs consists of two end
planes, inner and outer hyperboloidal surfaces, and twisted surfaces, and is an
indispensable component for cylindrical drift chambers (see K. Hoshina et al,
Computer Physics Communications 153 (2003) 373-391). In Geant3 exists
... More
Presented by O. LINK
on
30 Sep 2004
at
10:00
A full slice of the barrel detector of the ATLAS experiment at the LHC
is being tested this year with beams of pions, muons, electrons and
photons in the energy range 1-300 GeV in the H8 area of the CERN
SPS. It is a challenging exercise since, for the first time, the
complete software suite developed for the full ATLAS experiment
has been extended for use with real detector data, including
... More
Presented by A. FARILLA
on
30 Sep 2004
at
16:30
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
While there are differences among the LHC experiments in their views of the role of
databases and their deployment, there is relatively widespread agreement on a number
of principles:
1. Physics codes will need access to database-resident data. The need for database
access is not confined to middleware and services: physics-related data will reside
in databases.
2. Database-resi
... More
Presented by Dirk DUELLMANN
on
27 Sep 2004
at
15:00
The scope of this work is the study of scalability limits of the
Certification Authority (CA), running for large scale GRID environments.
The operation of Certification Authority is analyzed from the view of
the rate of incoming requests, complexity of authentication procedures,
LCG security restrictions and other limiting factors. It is shown, that
standard CA operational model
... More
Presented by E. BERDNIKOV
on
29 Sep 2004
at
10:00
The problem of finding the best match between jobs and computing
resources is critical for an efficient work load distribution in
Grids. Very often jobs are preferably run on the Computing Elements
(CEs) that can retrieve a copy of the input files from a local
Storage Element (SE). This requires that multiple file copies are
generated and managed by a data replication system.
We propos
... More
Presented by E. RONCHIERI
on
30 Sep 2004
at
16:30
The PHENIX experiment consists of many different detectors and
detector types, each one with its own needs concerning the
monitoring of the data quality and the calibration. To ease the task
for the shift crew to monitor the performance and status of each
subsystem in PHENIX we developed a general client server based
framework which delivers events at a rate in excess of 100Hz.
This
... More
Presented by Martin PURSCHKE
on
28 Sep 2004
at
10:00
OpenPAW is for people that definitively do not want
to quit the PAW command prompt, but seek anyway
an implementation based over more modern technologies.
We shall present the OpenScientist/Lab/opaw program
that offers a PAW command prompt by using the OpenScientist
tools (then C++, Inventor for doing graphic, Rio for doing
the IO, OnX for the GUI, etc...). The OpenScientist/Lab packa
... More
Presented by G B. BARRAND
on
30 Sep 2004
at
10:00
We want to present the status of this project.
After quickly remembering the basic choices around GUI, visualization
and scriptingm we would like to develop what had been done in order to
have an AIDA-3.2.1 complient systen, to visualize Geant4 data (G4Lab module),
to visualize ROOT data (Mangrove module), to have an hippodraw module
and what had been done in order to run on MacOSX by
... More
Presented by G B. BARRAND
on
27 Sep 2004
at
16:30
In September 2003 the first LCG-1 service was put into production at most of the
large Tier 1 sites and was quickly expanded up to 30 Tier 1 and Tier 2 sites by the
end of the year. Several software upgrades were made and the LCG-2 service was put
into production in time for the experiment data challenges that began in February
2004 and continued for several months. In particular LCG-2 i
... More
Presented by I. BIRD
on
28 Sep 2004
at
09:00
This paper discusses the challenges in maintaining a stable Managed Storage Service
for users built upon dynamic underlying disk and tape layers.
Early in 2004 the tools and techniques used to manage disk, tape, and stage servers
were refreshed in adopting the QUATTOR tool set. This has markedly increased the
coherency and efficiency of the configuration of data servers. The LEMON
moni
... More
Presented by T. SMITH
on
29 Sep 2004
at
14:00
Bitmap indices have gained wide acceptance in data warehouse
applications handling large amounts of read only data. High
dimensional ad hoc queries can be efficiently performed by utilizing
bitmap indices, especially if the queries cover only a subset of the
attributes stored in the database. Such access patterns are common
use in HEP analysis. Bitmap indices have been implemented by sev
... More
Presented by Vincenzo INNOCENTE
on
30 Sep 2004
at
15:00
In large-scale Grids, the replication of files to different sites is an important
data management mechanism which can reduce access latencies and give improved usage
of resources such as network bandwidth, storage and computing power.
In the search for an optimal data replication strategy, the Grid simulator OptorSim
was developed as part of the European DataGrid project. Simulations of variou
... More
Presented by C. NICHOLSON
on
29 Sep 2004
at
10:00
We will summarize the recent and current activities of the Geant4
working group responsible of the standard package of electromagnetic
physics. The major recent activities include an design iteration in
energy loss and multiple scattering domain providing "process versus
models" approach, and development of the following physics models:
multiple scattering, ultra relativistic muon physic
... More
Presented by Prof. V. IVANTCHENKO
on
27 Sep 2004
at
16:30
The LCG POOL project is now entering the third year of active development. The basic functionality of the
project is provided but some functional extensions will move into the POOL system this year. This
presentation will give a summary of the main functionality provided by POOL, which used in physics
productions today. We will then present the design and implementation of the main new inter
... More
Presented by D. DUELLMANN
on
29 Sep 2004
at
14:20
The POOL software package has been successfully integrated with the three large experiment software
frameworks of ATLAS, CMS and LHCb. This presentation will summarise the experience gained during these
integration efforts and will try to highlight the commonalities and the main differences between the
integration approaches. In particular we’ll discuss the role of the POOL object cache, t
... More
Presented by Giacomo GOVI
on
29 Sep 2004
at
14:40
Panoramix is an event display for LHCb. LaJoconde is
an interactive environment over DaVinci, the analysis
software layer for LHCb. We shall present global
technological choices behind these two softwares : GUI,
graphic, scripting, plotting. We shall present the connection
to the framework (Gaudi), how we can integrate other tools like
hippodraw. We shall present the overall capabili
... More
Presented by Dr. G B. BARRAND
on
30 Sep 2004
at
15:40
LHC experiments have large amounts of software to build. CMS has
studied ways to shorten project build times using parallel and
distributed builds as well as improved ways to decide what to rebuild.
We have experimented with making idle desktop and server machines
easily available as a virtual build cluster using distcc and zeroconf.
We have also tested variations of ccache and more tradition
... More
Presented by S. SCHMID
on
30 Sep 2004
at
10:00
We report the results of parallelization and tests of the Parton
String Model event generator at the parallel cluster of St.Petersburg
State University Telecommunication center.
Two schemes of parallelization were studied. In the first approach
master process coordinates work of slave processes, gathers and
analyzes data. Results of MC calculations are saved in local files.
Local files a
... More
Presented by S. NEMNYUGIN
on
28 Sep 2004
at
10:00
The report presents an analysis of the Alice Data Challenge 2004.
This Data Challenge has been performed on two different distributed
computing environments. The first one is the Alice Environment for
distributed computing (AliEn) used standalone. Presently this
environment allows ALICE physicists to obtain results on simulation,
reconstruction and analysis of data in ESD format for AA a
... More
Presented by G. SHABRATOVA
on
29 Sep 2004
at
10:00
FNAL has over 5000 PCs running either Linux or Windows software. Protecting these
systems efficiently against the latest vulnerabilities that arise has prompted FNAL
to take a more central approach to patching systems. We outline the lab support
structure for each OS and how we have provided a central solution that works within
existing support boundaries. The paper will cover how we ident
... More
Presented by J. SCHMIDT
on
28 Sep 2004
at
10:00
A common task for a reconstruction/analysis system is to be able to
output different sets of events to different permanent data stores
(e.g. files). This allows multiple related logical jobs to be grouped
into one process and run using the same input data (read from a
permanent data store and/or created from an algorithm). In our
system, physicists can specify multiple output 'paths', where
... More
Presented by C. JONES
on
30 Sep 2004
at
10:00
PATRIOT is a project that aims to provide better predictions of
physics events for the high-Pt physics program of Run2 at the
Tevatron collider.
Central to Patriot is an enstore or mass storage repository for files
describing the high-Pt physics predictions. These are typically
stored as StdHep files which can be handled by CDF and
D0 and run through detector and triggering simulatio
... More
Presented by S. MRENNA
on
29 Sep 2004
at
10:00
With the development of Linux and improvement of PC's performance, PC cluster used
as high performance computing system is becoming much popular. The performance of
I/O subsystem and cluster file system is critical to a high performance computing
system. In this work the basic characteristics of cluster file systems and their
performance are reviewed. The performance of four distributed cl
... More
Presented by Y. CHENG
on
27 Sep 2004
at
17:30
The D0 experiment at Fermilab's Tevatron will record several petabytes of data over
the next five years in pursuing the goals of understanding nature and searching for
the origin of mass. Computing resources required to analyze these data far exceed
the capabilities of any one institution. Moreover, the widely scattered
geographical distribution of collaborators poses further serious dif
... More
Presented by B. QUINN
on
29 Sep 2004
at
10:00
The ATLAS Trigger and DAQ system is designed to use the Region of
Interest (RoI)mechanism to reduce the initial Level 1 trigger rate of
100 kHz down to about 3.3 kHz Event Building rate.
The DataFlow component of the ATLAS TDAQ system is responsible
for the reading of the detector specific electronics via 1600 point
to point readout links, the collection and provision of RoI to the
Level
... More
Presented by G. UNEL
on
27 Sep 2004
at
18:10
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
This talk describes the various stages of ATLAS Data Challenge 2 (DC2)
in what concerns usage of resources deployed via NorduGrid's Advanced
Resource Connector (ARC). It also describes the integration of these
resources with the ATLAS production system using the Dulcinea
executor.
ATLAS Data Challenge 2 (DC2), run in 2004, was designed to be a step
forward in the distributed data processin
... More
on
29 Sep 2004
at
17:10
There are two kinds of analysis objects with respect to their
persistent requirements:
* Objects, which need direct access to the persistency service only
for their IO operations (read/write/update/...): histograms, clouds,
profiles, ...
All Persistency requirements for those objects can be implemented
by standard Transient-Persistent Separation techniques like JDO,
Serialization,
etc
... More
Presented by J. HRIVNAC
on
30 Sep 2004
at
10:00
The LHC Software will be confronted to unprecedented challenges as
soon as the LHC will turn on.
We summarize the main Software requirements coming from the LHC
detectors, triggers and physics, and we discuss several examples of
Software components developed by the experiments and the LCG project
(simulation, reconstruction, etc.), their validation, and their
adequacy for LHC phy
... More
Presented by Fabiola GIANOTTI
on
30 Sep 2004
at
09:00
In the framework of the LCG Simulation Physics Validation Project, we present
comparison studies between the GEANT4 and FLUKA shower packages and LHC sub-detector
test-beam data. Emphasis is given to the response of LHC calorimeters to electrons,
photons, muons and pions. Results of "simple-benchmark" studies, where the above
simulation packages are compared to data from nuclear facilities
... More
Presented by Alberto RIBON
on
27 Sep 2004
at
15:40
The Pixel Detector is the innermost one in the tracking system of the
Compact Muon Solenoid (CMS) experiment. It provides the most precise
measurements not only supporting the full track reconstruction but
also allowing the standalone reconstruction useful especially for
the online event selection at High-Level Trigger (HLT). The
performance of the Pixel Detector is given. The HLT algorith
... More
Presented by Dr. S. CUCCIARELLI
on
30 Sep 2004
at
10:00
During the runtime of any experiment, a central monitoring system that
detects problems as soon as they appear has an essential role. In a large
experiment, like Atlas, the online data acquisition system is
distributed across the nodes of large farms, each of them running several
processes that analyse a fraction of the events. In this architecture, it is
necessary to have a central process t
... More
Presented by P. CONDE MUINO
on
28 Sep 2004
at
10:00
Linux operating system has become the platform of choice in the HEP community.
However, the migration process from another operating system to Linux can
be a tremendous effort for developers and system administrators.
The ultimate goal of such a transition is to maximize agreement between the
final results of identical calculations on the different platforms.
Apart from the fine tuning of the
... More
Presented by V. KUZNETSOV
on
30 Sep 2004
at
10:00
Our goal is two fold. On one hand we wanted to address the interest of
CMS users to have LCG Physics analysis environment on Solaris. On the
other hand we wanted to assess the difficulty of porting code written in
Linux without particular attention to portability to other Unix
implementations. Our initial assumption was that the difficulty would be
manageable even for a very small team. This
... More
Presented by I. REGUERO, J A. LOPEZ-PEREZ
on
30 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
Resource management and scheduling of distributed, data-driven
applications in a Grid environment are challenging problems. Although
significant results were achieved in the past few years, the
development and the proper deployment of generic, reliable, standard
components present issues that still need to be completely
solved. Interested domains include workload management, resource
discove
... More
Presented by M. SGARAVATTO
on
30 Sep 2004
at
15:20
Various experimental configurations - such as, for instance, some
gaseous detectors, require a high precision simulation of
electromagnetic physics processes, accounting not only for the
primary interactions of particles with matter, but also capable of
describing the secondary effects deriving from the de-excitation of
atoms, where primary collisions may have created vacancies.
The Gea
... More
Presented by M.G. PIA
on
27 Sep 2004
at
16:50
The Geant4 Toolkit provides an ample set of alternative and complementary physics
models to handle the electromagnetic interactions of leptons,
photons, charged hadrons and ions.
Because of the critical role often played by simulation in the experimental design
and physics analysis, an accurate validation of the physics
models implemented in Geant4 is essential, down to the quantitative
... More
Presented by M.G. PIA
on
30 Sep 2004
at
10:00
Grid computing provides key infrastructure for distributed problem solving in
dynamic virtual organizations. However, Grids are still the domain of a few highly
trained programmers with expertise in networking, high-performance computing, and
operating systems.
One of the big issues in the full-scale usage of a grid is the matching of the
resource requirements of a job submission to avai
... More
Presented by A. ANJUM
on
29 Sep 2004
at
10:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
We describe the production experience gained from implementing and using
exclusively the San Diego Super Computer Center developed Storage Resource Broker
(SRB) to distribute the BaBar experiment's production event data stored in ROOT
files from the experiment center at SLAC, California, USA to a Tier A computing
center at ccinp3, Lyon France. In addition we outline how the system can be re
... More
Presented by A. HASAN
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
One of the goals of CMS Data Challenge in March-April 2004 (DC04) was to run
reconstruction for sustained period at 25 Hz input rate with distribution of the
produced data to CMS T1 centers for further analysis.
The reconstruction was run at the T0 using CMS production software, of which the main
components are RefDB (CMS Monte Carlo 'Reference Database' with Web interface) and
McRunjob (a
... More
Presented by J. ANDREEVA
on
27 Sep 2004
at
14:20
For The BaBar Computing Group
BaBar has recently moved away from using Objectivity/DB for it's event
store towards a ROOT-based event store. Data in the new format is
produced at about 20 institutions worldwide as well as at SLAC. Among
new challenges are the organization of data export from remote
institutions, archival at SLAC and making the data visible to users
for analysis and impo
... More
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The STAR experiment utilizes two major computing facilities for its data processing
needs - the RCF at Brookhaven and the PDSF at LBNL/NERSC. The sharing of data
between these facilities utilizes data grid services for file replication, and the
deployment of these services was accomplished in conjunction with the Particle
Physics Data Grid (PPDG). For STAR's 2004 run it will be necessary
... More
Presented by E. HJORT
on
27 Sep 2004
at
16:50
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
The BaBar experiment has been taking data since 1999. In 2001 the computing group
started to evaluate the possibility to evolve toward a distributed computing model in
a Grid environment. In 2003, a new computing model, described in other talks, was
implemented, and ROOT I/O is now being used as the Event Store. We implemented a
system, based onthe LHC Computing Grid (LCG) tools, to submit ful
... More
Presented by D. ANDREOTTI
on
29 Sep 2004
at
10:00
A software bus, just like its hardware equivalent, allows for the discovery,
installation, configuration, loading, unloading, and run-time replacement of software
components, as well as channeling of inter-component communication.
Python, a popular open-source programming language, encourages a modular design on
software written in it, but it offers little or no component functionality. Howeve
... More
Presented by W. LAVRIJSEN
on
30 Sep 2004
at
10:00
Bender, the Python based physics analysis application for LHCb combines the best
features of underlying Gaudi C++ software architecture with the flexibility of Python
scripting language and provides end-users with friendly physics analysis oriented
environment. It is based in one hand, on the generic Python bindings for the Gaudi
framework, called GaudiPython, and in the other hand on an effic
... More
Presented by Dr. P. MATO
on
30 Sep 2004
at
17:10
Software Quality Assurance is an integral part of the software
development process of the LCG Project and includes several activities
such as automatic testing, test coverage reports, static software
metrics reports, bug tracker, usage statistics and compliance to build,
code and release policies.
As a part of QA activity all levels of the sw-testing should be run as
a
... More
Presented by M. GALLAS
on
30 Sep 2004
at
17:50
The RDBC (ROOT DataBase Connectivity) library is a C++ implementation
of the The Java Database Connectivity Application Programming Interface.
It provides a DBMS-independent interface to relational databases from
ROOT as well as a generic SQL database access framework.
RDBC also extends the ROOT TSQL abstract interface.
Currently it is used in two large experiments:
- in Minos as inter
... More
Presented by V. ONUCHIN
on
30 Sep 2004
at
10:00
The ROOT geometry package is a tool designed for building, browsing,
tracking and visualizing a detector geometry. The code is
independent from other external MC for simulation, therefore it does
not contain any constraints related to physics. However, the package
defines a number of hooks for tracking, such as media, materials,
magnetic field or track state flags, in order to allow inter
... More
on
30 Sep 2004
at
10:00
The GUI is a very important component of the ROOT framework. Its
main purpose is to improve the usability and end-user perception. In
this paper, we present two main projects in this direction: the ROOT
graphics editor and the ROOT GUI builder.
The ROOT graphics editor is a recent addition to the framework. It
provides a state of the art and an intuitive way to create or edit
objects in
... More
Presented by I. ANTCHEVA
on
30 Sep 2004
at
10:00
In this paper we examine the performance of the raw Ethernet
protocol in deterministic, low-cost, real-time communication. Very
few applications have been reported until now, and they focus on the
use of the TCP and UDP protocols, which however add a sensible
overhead to the communication and reduce the useful bandwidth. We
show how low-level Ethernet access can be used for peer-to-peer
... More
Presented by A. ELEUTERI
on
28 Sep 2004
at
10:00
It is important that the total bandwidth of the multiple streams should
not exceed the network bandwidth in order to achieve a stable network
flow with high performance in high bandwidth-delay product networks.
Software control of bandwidth for each stream sometimes exceed the
specified bandwidth. We proposed the hardware control technique for
total bandwidth of multiple streams with high ac
... More
Presented by Dr. Y. KODAMA
on
30 Sep 2004
at
15:20
Since version 3.05/02, the ROOT I/O System has gone through
significant enhancements.
In particular, the STL container I/O has been upgraded to support
splitting, reading without existing libraries and using directly from
TTreeFormula (TTree queries).
This upgrade to the I/O system is such that it can be easily extended
(even by the users) to support the splitting and querying of almost
... More
Presented by P. CANAL
on
29 Sep 2004
at
15:00
Since its introduction in 1999, CMT is now used as a production tool
in many large software projects for physics research (ATLAS, LHCb,
Virgo, Auger, Planck). Although its basic concepts remain unchanged
since the beginning, proving their viability, it is still improving
and increasing its coverage of the configuration management
mechanisms. Two important evolutions have recently been introdu
... More
Presented by C. ARNAULT
on
30 Sep 2004
at
10:00
Python is a flexible, powerful, high-level language with excellent
interactive and introspective capabilities and a very clean syntax. As
such it can be a very effective tool for driving physics analysis.
Python is designed to be extensible in low-level C-like languages, and
its use as a scientific steering language has become quite widespread.
To this end, existing and custom-written
... More
Presented by W. LAVRIJSEN
on
27 Sep 2004
at
15:00
The CLEO III data acquisition was from the beginning in the late 90's
designed to allow remote operations and monitoring of the experiment.
Since changes in the coordination and operation of the CLEO experiment
two years ago enabled us to separate tasks of the shift crew into an
operational and a physics task, existing remote capabilities have
been revisited. In 2002/03 CLEO started to deplo
... More
on
28 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
The ATLAS experiment uses a tiered data Grid architecture that enables
possibly overlapping subsets, or replicas, of the original set to be
located across the ATLAS collaboration. The full set of experiment
data is located at a single Tier 0 site, and then subsets of the data
are located at national Tier 1 sites, smaller subsets at smaller
regional Tier 2 sites, and so on. In order to underst
... More
on
30 Sep 2004
at
14:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The LHCb experiment performed its latest Data Challenge (DC) in May-July 2004.
The main goal was to demonstrate the ability of the LHCb grid system to carry out
massive production and efficient distributed analysis of the simulation data.
The LHCb production system called DIRAC provided all the necessary services for the
DC: Production and Bookkeeping Databases, File catalogs, Workload and
... More
Presented by J. CLOSIER
on
29 Sep 2004
at
16:30
Rio (for ROOT IO) is a rewriting of the file IO system of ROOT.
We shall present our strong motivations of doing this
tedious work. We shall present the main choices done
in the Rio implementation (then by opposition to what we
don't like in ROOT). For example, we shall say why
we believe that an IO package is not a drawing package (no
TClass::Draw) ;
why someone should use pure
... More
Presented by G B. BARRAND
on
30 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The CMS 2004 Data Challenge (DC04) was devised to test several key
aspects of the CMS Computing Model in three ways: by trying to
sustain a 25 Hz reconstruction rate at the Tier-0; by distributing
the reconstructed data to six Tier-1 Regional Centers (FNAL in US,
FZK in Germany, Lyon in France, CNAF in Italy, PIC in Spain, RAL in
UK) and handling catalogue issues; by redistributing data t
... More
on
29 Sep 2004
at
14:20
In support of the Tevatron physics program, the Run II experiments have
developed computing models and hardware facilities to support data sets at
the petabyte scale, currently corresponding to 500 pb-1 of data and over 2
years of production operations. The systems are complete from online
data collection to user analysis, and make extensive use of central services
and common solutions dev
... More
Presented by A. BOEHNLEIN
on
27 Sep 2004
at
10:00
SAMGrid is a globally distributed system for data handling and job management,
developed at Fermilab for the D0 and CDF experiments in Run II. The Condor
system is being developed at the University of Wisconsin for management
of distributed resources, computational and otherwise. We briefly review the
SAMGrid architecture and its interaction with Condor, which was presented
earlier. We then p
... More
Presented by I. TEREKHOV
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
SAMGrid is the shared data handling framework of the two large Fermilab
Run II collider experiments: DZero and CDF. In production since 1999 at D0, and
since mid-2004 at CDF, the SAMGrid framework has been adapted over time to
accommodate a variety of storage solutions and configurations, as well as the
differing data processing models of these two experiments. This has been very
successful f
... More
Presented by R. KENNEDY
on
27 Sep 2004
at
18:10
The SAMGrid team is in the process of implementing a monitoring and
information service, which fulfills several important roles in the
operation of the SAMGrid system, and will replace the first
generation of monitoring tools in the current deployments. The first
generation tools are in general based on text logfiles and
represent solutions which are not scalable or maintainable. The role
... More
Presented by A. LYON
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
A grid consists of high-end computational, storage, and network resources that,
while known a priori, are dynamic with respect to activity and availability.
Efficient co-scheduling of requests to use grid resources must adapt to this
dynamic environment while meeting administrative policies. We discusses
the necessary requirements of such a scheduler and introduce a distributed
framewo
... More
Presented by R. CAVANAUGH
on
30 Sep 2004
at
14:40
The Belle experiment has accumulated an integrated luminosity of more than 240fb-1
so far, and a daily logged luminosity now exceeds 800pb-1. These numbers correspond
to more than 1PB of raw and processed data stored on tape and an accumulation of
the raw data at the rate of 1TB/day. The processed, compactified data, together
with Monte Carlo simulation data for the final physics analyses
... More
Presented by Y. IIDA
on
29 Sep 2004
at
17:30
Storage Resource Manager (SRM) and Grid File Access Library (GFAL) are GRID
middleware components used for transparent access to Storage Elements. SRM provides a
common interface (WEB service) to backend systems giving dynamic space allocation and
file management. GFAL provides a mechanism whereby an application software can access
a file at a site without having to know which transport mechan
... More
Presented by E. SLABOSPITSKAYA
on
29 Sep 2004
at
10:00
ScotGrid is a prototype regional computing centre formed as a collaboration between
the universities of Durham, Edinburgh and Glasgow as part of the UK's national
particle physics grid, GridPP. We outline the resources available at the three core
sites and our optimisation efforts for our user communities. We discuss the work
which has been conducted in extending the centre to embrace new pro
... More
Presented by S. THORN
on
27 Sep 2004
at
15:00
In a resource-sharing environment on the grid both grid users and grid
production managers call for security and data protection from
unauthorized access. To secure data management several novel grid
technologies were introduced in ATLAS data management. Our presentation
will review new grid technologies introduced in HEP production environment
for database access through the Grid Security In
... More
Presented by M. BRANCO
on
29 Sep 2004
at
15:00
Analyses in high-energy physics often involve the filling of large
amounts of histograms from n-tuple like data structures, e.g. RooT
trees. Even when using an object-oriented framework like RooT, a the
user code often follows a functional programming approach, where
booking, application of cuts, calculation of weights and
histogrammed quantities and finally the filling of the histogram
... More
Presented by Dr. J. LIST
on
30 Sep 2004
at
16:50
The clusters using DataGrid middleware are usually installed and
managed by means of an "LCFG" server. Originally developed by the
Univ. of Edinburgh and extended by DataGrid, this is a complex piece
of software. It allows for automated installation and configuration of
a complete grid site. However, installation of the "LCFG"-Server takes
most of the time, thus hinder widespread use.
... More
Presented by A. GARCIA
on
28 Sep 2004
at
10:00
The ATLAS detector is a sophisticated multi-purpose detector with
over 10 million electronics channels designed to study high-pT
physics at LHC. Due to their high multiplicity, reaching almost
hundred thousand particles per event, heavy ion collisions pose a
formidable computational challenge. A set of tools have been created
to realistically simulate and fully reconstruct the most diffi
... More
Presented by P. NEVSKI
on
30 Sep 2004
at
10:00
The Level 1 and High Level triggers for the LHCb experiment are
software triggers which will be implemented on a farm of about 1800
CPUs, connected to the detector read-out system by a large Gigabit
Ethernet LAN with a capacity of 8 Gigabyte/s and some 500 Gigabit
Ethernet links. The architecture of the readout network must be
designed to maximise data throughput, control data flow, all
... More
Presented by T. SHEARS
on
29 Sep 2004
at
15:40
This paper discusses some key points in the organization
of the HARP software. In particular it describes the configuration of
the packages, data and code management, testing and release procedures.
Development of the HARP software is based on incremental
releases with strict respect of the design structure.
This poses serious challenges to the software management,
which has gone through e
... More
Presented by E. TCHERNIAEV
on
30 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
CMS currently uses a number of tools to transfer data which, taken together, form
the basis of a heterogenous datagrid. The range of tools used, and the directed,
rather than optimised nature of CMS recent large scale data challenge required the
creation of a simple infrastructure that allowed a range of tools to operate in a
complementary way.
The system created comprises a hierarchy o
... More
Presented by T. BARRASS
on
29 Sep 2004
at
15:40
In the context of the SPI project in the LCG Application Area,
a centralized s/w management infrastructure has been deployed.
It comprises of a suite of scripts handling the building and
validating of the releases of the various projects as well as
providing a customized packaging of the released s/w. Emphasis
was put on the flexibility of the packaging and distribution
solution as it should
... More
Presented by A. PFEIFFER
on
30 Sep 2004
at
17:30
Generic programming as exemplified by the C++ standard library makes
use of functions or function objects (objects that accept function
syntax) to specialize generic algorithms for particular uses. Such
separation improves code reuse without sacrificing efficiency. We
employed this same technique in our combinatoric engine: DChain. In
DChain, physicists combine lists of child particles to
... More
Presented by C. JONES
on
30 Sep 2004
at
10:00
In the context of the LHC Computing Grid (LCG) project, the Applications Area
develops and maintains that part of the physics applications software and
associated infrastructure that is shared among the LHC experiments.
The Physicist Interface (PI) project of the LCG Application Area encompasses
the interfaces and tools by which physicists will directly use the software.
In collaboration wi
... More
Presented by A. PFEIFFER
on
30 Sep 2004
at
10:00
ATLAS is a particle detector which will is being built at CERN in
Geneva. The muon detection system is made up among other things, of
600 chambers measuring 2 to 6 m2 and 30 cm thick. The chambers'
position must be known with an accuracy of +/- 30 m for translations
and +/-100 rad for rotations for a range of +/- 5mm and +/-5mrad.
In order to fulfill these requirements, we have designed
... More
Presented by V. GAUTARD
on
28 Sep 2004
at
10:00
Within a Grid the possibility of managing storage space is fundamental, in
particular, before and during application execution. On the other hand, the
increasing availability of highly performant computing resources raises the need for
fast and efficient I/O operations and drives the development of parallel distributed
file systems able to satisfy these needs granting access to distributed sto
... More
Presented by L. MAGNONI
on
29 Sep 2004
at
17:50
Storage Resource Managers (SRMs) are middleware components whose function is to
provide dynamic space allocation and file management on shared storage components on
the Grid. SRMs support protocol negotiation and reliable replication mechanism. The
SRM standard allows independent institutions to implement their own SRMs, thus
allowing for a uniform access to heterogeneous storage elements. S
... More
Presented by T. PERELMUTOV
on
29 Sep 2004
at
17:10
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
Providing Grid applications with effective access to large volumes of data residing
on a multitude of storage systems with very different characteristics prompted the
introduction of storage resource managers (SRM). Their purpose is to provide
consistent and efficient wide-area access to storage resources unconstrained by
their particular implementation (tape, large disk arrays, dispersed
... More
Presented by Ofer RIND
on
27 Sep 2004
at
17:10
Presented by Tim SMITH
on
1 Oct 2004
at
11:05
Presented by Philippe CANAL
on
1 Oct 2004
at
09:20
Presented by Massimo LAMANNA
on
1 Oct 2004
at
09:45
Presented by Douglas OLSON
on
1 Oct 2004
at
10:40
Presented by Stephen GOWDY
on
1 Oct 2004
at
08:55
Presented by Dr. Pierre VANDE VYVRE
on
1 Oct 2004
at
08:30
Presented by Peter CLARKE
on
1 Oct 2004
at
11:30
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The Parallel ROOT Facility, PROOF, enables a physicist to analyze and
understand very large data sets on an interactive time scale. It makes use
of the inherent parallelism in event data and implements an architecture
that optimizes I/O and CPU utilization in heterogeneous clusters with
distributed storage. Scaling to many hundreds of servers is essential
to process tens or hundreds of gigaby
... More
Presented by M. BALLINTIJN
on
30 Sep 2004
at
15:00
We described the process for handling software builds and realeases for the Workload
Management package of the DataGrid project. The software development in the project
was shared among nine contractual partners, in seven different countries, and was
organized in work-packages covering different areas.
In this paper, we discuss how a combination of Concurrent Version System, GNU
autotools a
... More
Presented by E. RONCHIERI
on
30 Sep 2004
at
17:10
Computer simulations play a crucial role in both the design and
operation of particle accelerators. General tools for modeling
single-particle accelerator dynamics have been in wide use for many
years. Multi-particle dynamics are much more computationally
demanding than single-particle dynamics, requiring supercomputers or
parallel clusters of PCs. Because of this, simulations of multi-
pa
... More
Presented by Dr. P. SPENTZOURIS
on
27 Sep 2004
at
18:10
We have measured the performance of data transfer between CERN
and our laboratory, ICEPP, at the University of Tokyo in Japan.
The ICEPP will be one of the so-called regional centers for handling
the data from the ATLAS experiment which will start data taking in 2007.
More than petabytes of data are expected to be generated from the experiment
each year. It is therefore essential to achieve a
... More
Presented by Dr. J. TANAKA
on
30 Sep 2004
at
15:00
The athena software framework for event reconstruction in ATLAS
will be employed to analyse the data from the 2004 combined test beam.
In this combined test beam, a slice of the ATLAS detector is operated
and read out under conditions similar to future LHC running,
thus providing a test-bed for the complete reconstruction chain.
First results for the ATLAS InnerDetector will be presented.
... More
Presented by W. LIEBIG
on
30 Sep 2004
at
15:00
The talk presents the experience gathered during the testbed
administration (~100 PC and 15+ switches) for the ATLAS Experiment at
CERN.
It covers the techniques used to resolve the HW/SW conflicts, network
related problems, automatic installation and configuration of the
cluster nodes as well as system/service monitoring in the heterogeneous
dynamically changing cluster
... More
Presented by M. ZUREK
on
27 Sep 2004
at
17:30
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
To distribute computing for CDF (Collider Detector at Fermilab) a system managing
local compute and storage resources is needed. For this purpose CDF will use the
DCAF (Decentralized CDF Analysis Farms) system which is already at Fermilab. DCAF
has to work with the data handling system SAM (Sequential Access to data via
Metadata). However, both DCAF and SAM are mature systems which have no
... More
Presented by V. BARTSCH
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
During the first half of 2004 the ALICE experiment has performed a large distributed
computing exercise with two major objectives: to test the ALICE computing model,
included distributed analysis, and to provide data sample for a refinement of the
ALICE Jet physics Monte-Carlo studies. Simulation reconstruction and analysis of
several hundred thousand events were performed, using the heter
... More
Presented by A. PETERS
on
29 Sep 2004
at
15:40
The Experiment Control System (ECS) is the top level of control of the ALICE
experiment.
Running an experiment implies performing a set of activities on the online systems
that control the operation of the detectors. In ALICE, online systems are the
Trigger, the Detector Control Systems (DCS), the Data-Acquisition System (DAQ) and
the High-Level Trigger (HLT).
The ECS provides a framewor
... More
Presented by F. CARENA
on
29 Sep 2004
at
16:50
The ALICE experiment at LHC will implement a High Level Trigger
System, where the information from all major detectors are combined,
including the TPC, TRD, DIMUON, ITS etc. The largest computing
challenge is imposed by the TPC, requiring realtime pattern
recognition. The main task is to reconstruct the tracks in the TPC,
and in a final stage combine the tracking information from all
d
... More
Presented by M. RICHTER
on
29 Sep 2004
at
14:20
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The ARDA project was started in April 2004 to support
the four LHC experiments (ALICE, ATLAS, CMS and LHCb)
in the implementation of individual
production and analysis environments based on the EGEE middleware.
The main goal of the project is to allow a fast feedback between the
experiment and the middleware development teams via the
construction and the usage of end-to-end prototypes
al
... More
Presented by Julia ANDREEVA
on
30 Sep 2004
at
14:40
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
The ATLAS Computing Model is under continuous active development.
Previous exercises focussed on the Tier-0/Tier-1 interactions, with
an emphasis on the resource implications and only a high-level view
of the data and workflow. The work presented here considerably
revises the resource implications, and attempts to describe in some
detail the data and control flow from the High Level Trig
... More
Presented by R. JONES
on
29 Sep 2004
at
10:00
The 40 MHz collision rate at the LHC produces ~25 interactions per bunch crossing
within the ATLAS detector, resulting in terabytes of data per second to be handled
by the detector electronics and the trigger and DAQ system. A Level 1 trigger system
based on custom designed and built electronics will reduce the event rate to 100 kHz.
The DAQ system is responsible for the readout of the det
... More
Presented by G. UNEL
on
28 Sep 2004
at
10:00
The ALICE collaboration at the LHC is developing since 1998 an OO offline framework, written entirely in C++.
In 2001 a GRID system (AliEn - ALICE Environment) has been added and successfully integrated with ROOT
and the offline. The resulting combination allows ALICE to do most of the design of the detector and test the
validity of its computing model by performing large scale Data Challeng
... More
Presented by F. CARMINATI
on
27 Sep 2004
at
17:10
The architecture and performance of the ZEUS Global Track Trigger
(GTT) are described. Data from the ZEUS silicon Micro Vertex
detector's HELIX readout chips, corresponding to 200k channels, are
digitized by 3 crates of ADCs and PowerPC VME board computers push
cluster data for second level trigger processing and strip data for
event building via Fast and GigaEthernet network connections.
A
... More
Presented by M. SUTTON
on
27 Sep 2004
at
14:20
Athena is the Atlas Control Framework, based on the common Gaudi architecture,
originally developed by LHCb. In 2004 two major production efforts, the Data
Challenge 2 and the Combined Test-beam reconstruction and analysis were structured as
Athena applications. To support the production work we have added new features to
both Athena and Gaudi: an "Interval of Validity" service to manage time-
... More
Presented by P. CALAFIURA
on
27 Sep 2004
at
16:50
We describe the philosophy and design of Atlantis, an event visualisation
program for the ATLAS experiment at CERN. Written in Java, it employs the
Swing API to provide an easily configurable Graphical User Interface.
Atlantis implements a collection of intuitive, data-orientated 2D
projections, which enable the user to quickly understand and visually
investigate complete ATLAS events. Even
... More
Presented by J. DROHAN
on
30 Sep 2004
at
15:20
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
The new BaBar bookkeeping system comes with tools to directly support
data analysis tasks. This Task Manager system acts as an interface
between datasets defined in the bookkeeping system, which are used as
input to analyzes, and the offline analysis framework. The Task
Manager organizes the processing of the data by creating specific jobs
to be either submitted to a batch system, or run in
... More
Presented by Douglas SMITH
on
29 Sep 2004
at
10:00
The grand goal in neuroscience research is to understand how the interplay of
structural, chemical and electrical signals in nervous tissue gives rise to
behavior. Experimental advances of the past decades have given the individual
neuroscientist an increasingly powerful arsenal for obtaining data, from the level
of molecules to nervous systems. Scientists have begun the arduous and chall
... More
Presented by M. ELLISMAN
on
28 Sep 2004
at
11:00
Geant4 is a toolkit for the simulation of the passage of particles
through matter. Amongst its applications are hadronic calorimeters
of LHC detectors and simulation of radiation environments. For these
types of simulation, a good description of secondaries generated by
inelastic interactions of primary nucleons and pions is particularly
important.
The Geant4 Binary Cascade is a hybr
... More
Presented by Dr. G. FOLGER
on
30 Sep 2004
at
10:00
We will describe the plans and objectives of the recently funded PPARC(UK) e-science
project, the Combined E-Science Data Analysis Resource for High Energy Physics
(CEDAR), which will combine the strengths of the well established and widely used
HEPDATA library of HEP data and the innovative JETWEB Data/Monte Carlo comparison
facility built on the HZTOOL package and which exploits developing g
... More
Presented by Dr. M. WHALLEY
on
30 Sep 2004
at
10:00
US-CMS is building up expertise at regional centers in preparation for analysis of LHC data. The User Analysis
Farm (UAF) is part of the Tier 1 facility at Fermilab. The UAF is being developed to support the efforts of the
Fermilab LHC Physics Center (LPC) and to enableefficient analysis of CMS data in the US.
The support, infrastructure, and services to enable a local analysis community at
... More
Presented by Ian FISK
on
28 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
Clarens enables distributed, secure and high-performance access to the
worldwide data storage, compute, and information Grids being constructed in
anticipation of the needs of the Large Hadron Collider at CERN. We report on
the rapid progress in the development of a second server implementation in
the Java language, the evolution of a peer-to-peer network of Clarens
servers, and general impro
... More
Presented by C. STEENBERG
on
29 Sep 2004
at
14:40
Type: poster
Session:
Poster Session 1
Track: Track 5 - Distributed Computing Systems and Experiences
The CDF Analysis Facility (CAF) has been in use since April 2002
and has successfully served 100s of users on 1000s of CPUs.
The original CAF used FBSNG as a batch manager.
In the current trend toward multisite deployment,
FBSNG was found to be a limiting factor,
so the CAF has been reimplemented to use Condor instead.
Condor is a more widely used batch system and
is well integrated wit
... More
on
28 Sep 2004
at
10:00
The ATLAS data acquisition system uses the database to describe configurations
for different types of data taking runs and different sub-detectors. Such
configurations are composed of complex data objects with many inter-relations.
During the DAQ system initialisation phase the configurations database is
simultaneously accessed by a large number of processes. It is also required that
such pro
... More
Presented by I. SOLOVIEV
on
28 Sep 2004
at
10:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
The D0 experiment relies on large scale computing systems to achieve her
physics goals. As the experiment lifetime spans, multiple generations of
computing hardware, it is fundemental to make projective models in to use
available resources to meet the anticipated needs. In addition, computing
resources can be supplied as in-kind contributions by collaborating
institutions and countries, ho
... More
Presented by A. BOEHNLEIN
on
29 Sep 2004
at
10:00
S.Argiro`(1), A. Kopmann (2), O.Martineau (2), H.-J. Mathes (2)
for the Pierre Auger Collaboration
(1) INFN, Sezione Torino
(2) Forschungszentrum Karlsruhe
The Pierre Auger Observatory currently under construction in Argentina will
investigate extensive air showers at energies above 10^18 eV. It
consists of a ground array of 1600 Cherenkov water detectors and 24
fluorescence telescope
... More
Presented by H-J. MATHES
on
27 Sep 2004
at
15:40
The DZERO Level 3 Trigger and Data Aquisition (L3DAQ) system has been
running continuously since Spring 2002. DZERO is loacated at one of the
two interaction points in the Fermilab Tevatron Collider. The L3DAQ
moves front-end readout data from VME crates to a trigger processor
farm. It is built upon a Cisco 6509 Ethernet switch, standard PCs, and
commodity VME single board computers. We will
... More
Presented by D CHAPIN
on
27 Sep 2004
at
17:10
The ATLAS Detector consists of several major subsytems: an inner detector composed of
pixels, microstrip detectors and a transition radiation tracker; electromagnetic and
hadronic calorimetry, and a muon spectrometer. Over the last year, these systems have
been described in terms of a set of geometrical primitives known as GeoModel.
Software components for detector description interpret struct
... More
Presented by Vakhtang TSULAIA
on
30 Sep 2004
at
10:00
We describe our experience in building a cost efficient High Throughput Cluster (HTC)
using commodity hardware and free software within a university environment.
Our HTC has a modular system architecture and is designed to be upgradable.
The current, second phase configuration, consists of 344 processors and 20 Tbyte of
RAID storage.
In order to rapidly install and upgrade software, we ha
... More
Presented by A. MARTIN
on
28 Sep 2004
at
10:00
Dr Sutherland will review the evolution of computing over the past
decade, focusing particularly on the development of the database and
middleware from client server to Internet computing.
But what are the next steps from the perspective of a software
company? Dr Sutherland will discuss the development of Grid as well
as the future applications revolving around collaborative working,
... More
Presented by Andrew SUTHERLAND
on
29 Sep 2004
at
09:00
The global network is more than ever taking its role as the
great "enabler" for many branches of science and research. Foremost
amongst such science drivers is of course the LHC/LCG programme,
although there are several other sectors with growing demands of the
network.
Common to all of these is the realisation that a straightforward
over provisioned best efforts wide area IP service
... More
Presented by Peter CLARKE
on
30 Sep 2004
at
11:30
OPERA is a massive lead/emulsion target for a long-baseline neutrino
oscillation search. More then 90% of the useful experimental data in OPERA
will be produced by the scanning of emulsion plates with the automatic microscopes.
The main goal of the data processing in OPERA will be the search, analysis and
identification of primary and secondary vertexes produced by neutrino in
lead-emuls
... More
Presented by Dr. V. TIOUKOV
on
30 Sep 2004
at
10:00
The FreeHEP Java library contains a complete implementation
of Root IO for Java. The library uses the "Streamer Info" embedded in files created
by Root 3.x to dynamically create high performance Java proxies for Root objects,
making it possible to read any Root file, including files with user defined
objects. In this presentation we will discuss the status of this code, explain its
imple
... More
Presented by T. JOHNSON
on
29 Sep 2004
at
15:40
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
Any physicist who will analyse data from the LHC experiments will have to deal with
data and computing resources which are distributed across multiple locations and with
different access methods. GANGA helps the end user by tying in specifically to the
solutions for a given experiment ranging from specification of data to retrieval and
post-processing of produced output. For LHCb and ATLAS the
... More
on
30 Sep 2004
at
16:30
The GeoModel toolkit is a library of geometrical primitives that can be
used to describe detector geometries. The toolkit is designed as a data
layer, and especially optimized in order to be able to describe large and
complex detector systems with minimum memory consumption. Some of the
techniques used to minimize the memory consumption are: shared instancing
with reference counting, comp
... More
Presented by V. TSULAIA
on
30 Sep 2004
at
14:40
The Pierre Auger Observatory consists of two sites with several
semi-autonomous detection systems. Each component, and in some cases
each event, provides a preferred coordinate system for simulation and
analysis. To avoid a proliferation of coordinate systems in the
offline software of the Pierre Auger Observatory, we have developed a
geometry package that allows the treatment of fundamental
... More
Presented by L. NELLEN
on
30 Sep 2004
at
10:00
We describe the GridSite authorization system, developed by GridPP and the
EU DataGrid project for access control in High Energy Physics grid
environments with distributed virtual organizations. This system provides a
general toolkit of common functions, including the evaluation of access
policies (in GACL or XACML), the manipulation of digital credentials
(X.509, GSI Proxies or VOMS attribut
... More
Presented by A. MCNAB
on
29 Sep 2004
at
15:20
We present the scheme in use for online high level
filtering, event reconstruction and classification
in the H1 experiment at HERA since 2001.
The Data Flow framework ( presented at CHEP2001 ) will
be reviewed. This is based on CORBA for all data transfer,
multi-threaded C++ code to handle the data flow and
synchronisation and fortran code for reconstruction and
event selection. A control
... More
Presented by A. CAMPBELL
on
29 Sep 2004
at
15:20
The observation of Higgs bosons predicted in supersymmetric theories
will be a challenging task for the CMS experiment at the LHC, in
particular for its High Level trigger (HLT). A prototype of the
High Level Trigger software to be used in the filter farm of the CMS
experiment and for the filtering of monte carlo samples will be
presented. The implemented prototype heavily uses recursive
... More
Presented by O. VAN DER AA
on
29 Sep 2004
at
15:20
The Global Technology Outlook (GTO) is IBM Research’s projection of the
future for information technology (IT). The GTO identifies progress and
trends in key indicators such as raw computing speed, bandwidth, storage,
software technology, and business modeling. These new technologies have the
potential to radically transform the performance and utility of tomorrow's
information processing s
... More
Presented by Dave MCQUEENEY
on
29 Sep 2004
at
12:00
The talk will cover briefly the current status of the LHC Computing Grid project
and will discuss the main challenges facing us as we prepare for the startup of LHC.
Presented by Les ROBERTSON
on
28 Sep 2004
at
08:30
A web portal has been developed, in the context of the LCG/SPI project, in
order to coordinate workflow and manage information in large software
projects. It is a development of the GNU Savannah package and offers a range
of services to every hosted project: Bug / support / patch trackers, a
simple task planning system, news threads, and a download area for software
releases. Features and
... More
Presented by Y. PERRIN
on
30 Sep 2004
at
10:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
AliEn (ALICE Environment) is a GRID middleware developed and used in the context of ALICE, the CERN LHC
heavy-ion experiment. In order to run Data Challenges exploiting both AliEn “native” resources and any
infrastructure based on EDG-derived middleware (such as the LCG and the Italian GRID.IT), an interface
system was designed and implemented; some details of a prototype were already pr
... More
Presented by S. BAGNASCO
on
29 Sep 2004
at
10:00
The aim of the LHCb configuration database is to store all the
controllable devices of the detector. The experiment’s control system
(that uses PVSS) will configure, start up and monitor the detector
from the information in the configuration database. The database will
contain devices with their properties, connectivity and hierarchy. The
ability to rapidly store and retrieve huge amounts o
... More
Presented by L. ABADIE
on
29 Sep 2004
at
17:50
Network security at IHEP is becoming one of the most important issues
of computing environment. To protect its computing and network
resources against attacks and viruses from outside of the institute,
security measures to combat these are implemented. To enforce
security policy the network infrastructure was re-configured
to one intranet and two DMZ areas. New rules to control the acces
... More
Presented by Mrs. L. MA
on
30 Sep 2004
at
18:10
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
As the BaBar experiment shifted its computing model to a ROOT-based
framework, we undertook the development of a high-performance file server
as the basis for a fault-tolerant storage environment whose ultimate goal
was to minimize job failures due to server failures. Capitalizing on our
five years of experience with extending Objectivity's Advanced
Multithreaded Server (AMS), elements were a
... More
Presented by A. HANUSHEVSKY
on
27 Sep 2004
at
16:30
The Pierre Auger Observatory is designed to unveil the nature and the
origin of the highest energy cosmic rays. Two sites, one currently
under construction in Argentina, and another pending in the Northern
hemisphere, will observe extensive air showers using a hybrid detector
comprising a ground array of 1600 water Cerenkov tanks overlooked by
four atmospheric fluorescence detectors. Though
... More
Presented by L. NELLEN
on
27 Sep 2004
at
18:10
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The U.S.LHC Tier-1 and Tier-2 laboratories and universities are developing production Grids to support LHC
applications running across a worldwide Grid computing system. Together with partners in computer science,
physics grid projects and running experiments, we will build a common national production grid
infrastructure which is open in its architecture, implementation and use.
The OSG
... More
Presented by R. PORDES
on
27 Sep 2004
at
17:10
The PHENIX detector consists of 14 detector subsystems. It is designed such
that individual subsystems can be read out independently in parallel as well
as a single unit. The DAQ used to read the detector is a highly-pipelined
parallel system. Because PHENIX is interested in rare physics events, the DAQ
is required to have a fast trigger, deep buffering, and very high bandwidth.
The PHEN
... More
Presented by D. WINTER
on
27 Sep 2004
at
16:50
A central idea of Grid Computing is the virtualization of
heterogeneous resources. To meet this challenge the Institute for
Scientific Computing, IWR, has started the project CampusGrid. Its
medium term goal is to provide a seamless IT environment
supporting the on-site research activities in physics,
bioinformatics, nanotechnology and meteorology. The environment
will include all kind
... More
Presented by O. SCHNEIDER
on
28 Sep 2004
at
10:00
The ROOT linear algebra package has been invigorated . The
hierarchical structure has been improved allowing different flavors of
matrices, like dense and symmetric . A fairly complete set of matrix
decompositions has been added to support matrix inversions and solving
linear equations.
The package has been extensively compared to other algorithms for its
accuracy and performance.
In th
... More
Presented by R. BRUN
on
30 Sep 2004
at
10:00
The SAMGrid Database Server encapsulates several important services, such as
accessing file metadata and replica catalog, keeping track of the processing
information, as well as providing the runtime support for SAMGrid station
services. Recent deployment of the SAMGrid system for CDF has resulted in
unification of the database schema used by CDF and D0, and the complexity
of changes requi
... More
Presented by S. VESELI
on
29 Sep 2004
at
18:10
The C++ programming language has very limited capabilities for
reflection information about its objects. In this paper a new reflection
system will be presented, which allows complete introspection of C++
objects and has been developed in the context of the CERN/LCG/SEAL
project in collaboration with the ROOT project.
The reflection system consists of two different parts. The first part is
... More
Presented by S. ROISER
on
27 Sep 2004
at
14:40
This paper describes the component model that has been developed in the context of
the LCG/SEAL project. This component model is an attempt to handle the increasing
complexity in the current data processing applications of LHC experiments. In
addition, it should facilitate the software re-use by the integration of software
components from LCG and non-LCG into the experiment's applications.
... More
Presented by R. CHYTRACEK
on
27 Sep 2004
at
14:20
Type: oral presentation
Session:
Distributed Computing Services
Track: Track 4 - Distributed Computing Services
While many success stories can be told as a product of the Grid middleware
developments, most of the existing systems relying on workflow and job execution are
based on integration of self-contained production systems interfacing with a given
scheduling component or portal, or directly uses the base component of the Grid
middleware (globus-job-run, globus-job-submit). However, such systems usu
... More
Presented by J. LAURET
on
30 Sep 2004
at
14:20
The Tag Collector is a web interfaced database application for release management.
The tool is tightly coupled to CVS, and also to CMT, the configuration management
tool. Developers can interactively select the CVS tags to be included in a build, and
the complete build commands are produced automatically. Other features are provided
such as verification of package CMT requirements files, and d
... More
Presented by S. ALBRAND
on
30 Sep 2004
at
10:00
The ATLAS reconstruction software requires extrapolation to arbitrary oriented
surfaces of different types inside a non-uniform magnetic field. In addition multiple
scattering and energy loss effects along the propagated trajectories have to be taken
into account. A good performace in respect of computing time consumption is crucial
due to hit and track multiplicity in high luminosity events a
... More
Presented by A. SALZBURGER
on
30 Sep 2004
at
10:00
In order for physicist to easily benefit from the different existing
geometry tools used within the community, the Virtual Geometry Model
(VGM) has been designed. In the VGM we introduce the abstract interfaces
to geometry objects and an abstract factory for geometry construction,
import and export. The interfaces to geometry objects were defined to be
suitable to describe "geant-like" geom
... More
Presented by I. HRIVNACOVA
on
30 Sep 2004
at
14:00
The current major detector simulation programs, i.e. GEANT3, GEANT4
and FLUKA have largely incompatible environments. This forces the
physicists willing to make comparisons between the different
transport Monte Carlos to develop entirely different programs.
Moreover, migration from one program to the other is usually
very expensive, in manpower and time, for an experiment offline
envir
... More
Presented by A. GHEATA
on
29 Sep 2004
at
14:40
Current grid development projects are being designed such that they
require end users to be authenticated under the auspices of
a "recognized" organization, called a Virtual Organization (VO). A VO
must establish resource-usage agreements with grid resource
providers. The VO is responsible for authorizing its members for grid
computing privileges. The individual sites and resources typic
... More
Presented by Ian FISK
on
29 Sep 2004
at
17:30
A common LCG architecture for the Conditions Database for the time
evolving data enables the possibility to separate the interval-of-
validity (IOV) information from the conditions data payload. The two
approaches can be beneficial in different cases and separation
presents challenges for efficient knowledge discovery, navigation and
data visualization. In our paper we describe the conditions
... More
Presented by D. KLOSE
on
30 Sep 2004
at
10:00
The design, implementation and performance of the ZEUS Global
Tracking Trigger (GTT) Forward Algorithm is described. The ZEUS GTT
Forward Algorithm integrates track information from the ZEUS Micro
Vertex Detector (MVD) and forward Straw Tube Tracker (STT) to
provide a picture of the event topology in the forward direction
($1.5<\eta <3$ ) of the ZEUS detector. This region is particul
... More
Presented by Dimitri GLADKOV
on
30 Sep 2004
at
10:00
The current design, implementation and performance of the ZEUS global
tracking trigger barrel algorithm are described. The ZEUS global
tracking trigger integrates track information from the ZEUS central
tracking chamber (CTD) and micro vertex detector (MVD) to obtain a
global picture of the track topology in the ZEUS detector at the
second level trigger stage. Algorithm processing is perfor
... More
Presented by M. SUTTON
on
30 Sep 2004
at
14:20
A new object-oriented Minimization package is available via the ZOOM cvs
repository. This package, designed for use in HEP applications, has all
the capabilities of Minuit, but is a re-write from scratch, adhering to modern
C++ design principles.
A primary goal of this package is extensibility in several directions, so that
its capabilities can be kept fresh with as little mainte
... More
Presented by M. FISCHLER
on
30 Sep 2004
at
15:40
This article describes the simulation of the read-out subsystem
which will be subject to the BESIII data acquisition system.
According to the purpose of the BESIII, the event rate will be about
4000Hz, and the data rate up to 50Mbytes/sec after Level 1 trigger.
The read-out subsystem consists of some read-out crates and read-out
computer whose principle function is to collect event data
... More
Presented by Mei YE
on
30 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
AliEn (ALICE Environment) is a Grid framework developed by the Alice Collaboration and used in production
for almost 3 years. From the beginning, the system was constructed using Web Services and standard
network protocols and Open Source components. The main thrust of the development was on the design and
implementation of an open and modular architecture. A large part of the component cam
... More
Presented by P. BUNCIC
on
27 Sep 2004
at
15:20
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
One of the most important problems in software management of a very
large and complex project such as Atlas is how to deploy the software
on the running sites. By running sites we include computer sites
ranging from computing centers in the usual sense down to individual
laptops but also the computer elements of a computing grid
organization. The deployment activity consists in constructing a
... More
Presented by C. ARNAULT
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The Event Reconstruction Control System of the BaBar experiment was redesigned in
2002, to satisfy the following major requirements: flexibility and scalability.
Because of its very nature, this system is continuously maintained to implement the
changing policies, typical of a complex, distributed production enviromnent.
In 2003, a major revolution in the BaBar computing model, the Computing
... More
Presented by A. CESERACCIU
on
27 Sep 2004
at
14:00
Just as the development of the World Wide Web has had its greatest
impact outside particle physics, so it will be with the development
of the Grid.
E-science, of which the Grid is just a small part, is already making
a big impact upon many scientific disciplines, and facilitating new
scientific discoveries that would be difficult to achieve in any
other way. Key to this is the definitio
... More
Presented by Ken PEACH
on
28 Sep 2004
at
12:00
BES is an experiment on Beijing Electron-Positron Collider (BEPC).
BES computing environment consists of PC/Linux cluster and mainly relies on the free
software. OpenPBS and Ganglia are used as job schedule and monitor system. With
helps from CERN IT Division, CASTOR was implemented as storage management system.
BEPC is being upgraded and luminosity will increase one hundred times comparin
... More
Presented by G. CHEN
on
27 Sep 2004
at
15:20
This talk will describe the new analysis computing model deployed by
BaBar over the past year. The new model was designed to better
support the current and future needs of physicists analyzing data,
and to improve BaBar's analysis computing efficiency.
The use of RootIO in the new model is described in other talks.
Babar's new analysis data content format contains both high and low
level
... More
Presented by D. BROWN
on
30 Sep 2004
at
15:40
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
This paper presents an overview of the legacy interface provided for
the ATLAS DC2 production system. The term legacy refers to any
non-grid system which may be deployed for use within DC2. The
reasoning behind providing such a service for DC2 is twofold in
nature. Firstly, the legacy interface provides a backup solution
should unforeseen problems occur while developing the grid based
interf
... More
Presented by J. KENNEDY
on
29 Sep 2004
at
10:00
In the 18 months since the CHEP03 meeting in San Diego, the HEP community deployed
the current generation of grid technologies in a veracity of settings. Legacy
software as well as recently developed applications was interfaced with middleware
tools to deliver end-to-end capabilities to HEP experiments in different stages of
their life cycles. In a series of data challenges, reprocessing
... More
Presented by Miron LIVNY
on
29 Sep 2004
at
08:30
The simulation for the ATLAS experiment is presently operational in a full OO
environment and it is presented here in terms of successful solutions to problems
dealing with application in a wide community using a common framework. The ATLAS
experiment is the perfect scenario where to test all applications able to satisfy the
different needs of a big community. Following a well stated strategy
... More
Presented by Prof. A. RIMOLDI
on
29 Sep 2004
at
14:00
Fermilab has developed and successively uses Enstore Data Storage
System. It is a primary data store for the Run II Collider Experiments,
as well as for the others. It provides data storage in robotic tape libraries
according to requirements of the experiments. High fault tolerance and
availability, as well as multilevel priority based request processing
allows experiments to effectively sto
... More
Presented by A. MOIBENKO
on
29 Sep 2004
at
14:20
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
During the CMS Data Challenge 2004 a realtime analysis was attempted
at INFN and PIC Tier-1 and Tier-2s in order to test the ability of
the instrumented methods to quickly process the data.
Several agents and automatic procedures were implemented to perform
the analysis at the Tier-1/2 synchronously with the data transfer
from Tier-0 at CERN. The system was implemented in the Grid LCG-2
... More
Presented by N. DE FILIPPIS
on
30 Sep 2004
at
16:50
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
The Fermilab CDF Run-II experiment is now providing official support for
remote computing, expanding this to about 1/4 of the total CDF computing
during the Summer of 2004.
I will discuss in detail the extensions to CDF software distribution
and configuration tools and procedures, in support of CDF GRID/DCAF
computing for Summer 2004. We face the challenge of unreliable networks,
time diff
... More
Presented by A. KREYMER
on
29 Sep 2004
at
10:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
In the High Energy Physics (HEP) community, Grid technologies have
been accepted as solutions to the distributed computing problem.
Several Grid projects have provided software in the last years. Among
of all them, the LCG - especially aimed at HEP applications -
provides a set of services and respective client interfaces, both in
the form of command line tools as well as programming lang
... More
on
29 Sep 2004
at
10:00
Tracks finding and fitting algorithm in ALICE Time projection chamber (TPC) and Inner Tracking System (ITS)
based on the Kalman-filtering are presented. The filtering algorithm is able to cope with non-Gaussian noise
and ambiguous measurements in high-density environments. The tracking algorithm consists of two parts:
one for the TPC and one for the prolongation into the ITS. The occupancy i
... More
Presented by Mr. M. IVANOV
on
30 Sep 2004
at
15:20
Long lived charged hyperon, $\Xi$ and $\Omega$, are capable of travelling significant
distances producing hits in the silicon detector, before decaying into
$\Lambda^0 \pi$ and $\Lambda^0 K$ pairs, respectively. This gives unique
opportunity of reconstructiong hyperon tracks. We have developed a dedicated
"outside-in" tracking algorithm that is seeded by 4-momentum and decay vertex of
the lo
... More
Presented by Dr. E. GERCHTEIN
on
30 Sep 2004
at
10:00
It is essential to provide users transparent access to time varying
data, such as detector misalignments, calibration parameters and the
like. This data should be automatically updated, without user
intervention, whenever it changes. Furthermore, the user should be
able to be notified whenever a particular datum is updated, so as to
perform actions such as re-caching of compound results, or p
... More
Presented by C. LEGGETT
on
30 Sep 2004
at
10:00
The FLUKA Monte Carlo transport code is a well-known simulation tool in High Energy
Physics. FLUKA is a dynamic tool in the sense that it is being continually updated
and improved by the authors. Here we review the progresses achieved in the last
year on the physics models. From the point of view of hadronic physics, most of the
effort is still in the field of nucleus--nucleus interactio
... More
Presented by L. PINSKY
on
27 Sep 2004
at
15:00
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
Breast cancer screening programs require managing and accessing a
huge amount of data, intrinsically distributed, as they are collected
in different Hospitals. The development of an application based on
Computer Assisted Detection algorithms for the analysis of digitised
mammograms in a distributed environment is a typical GRID use case.
In particular, AliEn (ALICE Environment) services,
... More
Presented by P. CERELLO
on
29 Sep 2004
at
10:00
The Nordic Grid facility (NorduGrid) came into production operation during
the summer of 2002 when the Scandinavian Atlas HEP group started to use
the Grid for the Atlas Data Challenges and was thus the first Grid ever
contributing to an Atlas production. Since then, the Grid facility has
been in continuous 24/7 operation offering an increasing number of
resources to a growing set of active u
... More
Presented by O. SMIRNOVA
on
29 Sep 2004
at
10:00
Type: oral presentation
Session:
Distributed Computing Systems and Experiences
Track: Track 5 - Distributed Computing Systems and Experiences
The University of Wisconsin distributed computing research groups
developed a software system called Condor for high throughput computing
using commodity hardware. An adaptation of this software, Condor-G, is
part of Globus grid computing toolkit. However, original Condor has
additional features that allows building of an enterprise level grid.
Several UW departments have Condor computing poo
... More
Presented by S. DASU
on
27 Sep 2004
at
17:30
Protein analysis, imaging, and DNA sequencing are some of the branches
of biology where growth has been enabled by the availability of
computational resources. With this growth, biologists face an
associated need for reliable, flexible storage systems. For decades
the HEP community has been driving the development of such storage
systems to meet their own needs. Two of these systems - the
... More
Presented by Alan TACKETT
on
28 Sep 2004
at
10:00
Implementing strategies for secured access to widely accessible
clusters is a basic requirement of these services, in particular if
GRID integration is sought for. This issue has two complementary
lines to be considered: security perimeter and intrusion detection
systems. In this paper we address aspects of the second one.
Compared to classical intrusion detection mechanisms, close monitor
... More
Presented by M. CARDENAS MONTES
on
29 Sep 2004
at
14:40
Expansion of large computing fabrics/clusters throughout the world would
create a need for stricter security. Otherwise any system could suffer damages
such as data loss, data falsification or misuse.
Perimeter security and intrusion detection system (IDS) are the two main
aspects that must be taken into account in order to achieve system security.
The main target of an intrusion detec
... More
Presented by E. PEREZ-CALLE
on
29 Sep 2004
at
10:00
We report on the software for Object-oriented Reconstruction for CMS
Analysis, ORCA. It is based on the Coherent Object-oriented Base for
Reconstruction, Analysis and simulation (COBRA) and used for
digitization and reconstruction of simulated Monte-Carlo events as
well as testbeam data.
For the 2004 data challenge the functionality of the software has
been extended to store collec
... More
Presented by Dr. S. WYNHOFF
on
29 Sep 2004
at
17:30
Validation of hadronic physics processes of the Geant4 simulation
toolkit is a very important task to ensure adequate physics results for
the experiments being built at the Large Hadron Collider. We report on
simulation results obtained using the Geant4 Bertini cascade
double-differential production cross-sections for various target
materials and incident hadron kinetic energies between 0.1-1
... More
on
30 Sep 2004
at
10:00
For physics analysis in ATLAS, reliable vertex finding and
fitting algorithms are important. In the harsh enviroment
of the LHC (~ 23 inelastic collissions every 25 ns) this task
turns out to be particularily challenging. One of the guiding
principles in developing the vertexing packages is a strong
focus on modularity and defined interfaces using the advantages
of object oriented C++. The b
... More
Presented by A. WILDAUER
on
30 Sep 2004
at
17:30
Using the modern 3D visualization software and hardware to represent
the object models of the HEP detectors would create the impressive
pictures of events and the detail views of the detectors facilitating
the design, simulation and data analysis and representation the huge
amount of the information flooding the modern HEP experiments. In this
paper we represent the work made by members of S
... More
Presented by Mr. A. KULIKOV
on
30 Sep 2004
at
10:00
The simulation, reconstruction and analysis software access to the
magnetic field has large impact both on CPU performance and on
accuracy.
An approach based on a volume geometry is described. The volumes are
constructed in such a way that their boundaries correspond to field
discontinuities, which are due to changes in magnetic permeability
of the materials. The field in each volum
... More
Presented by T. TODOROV
on
30 Sep 2004
at
10:00
The Compact Muon Solenoid (CMS) experiment at CERN's Large Hadron Collider (LHC) is
scheduled to come on-line in 2007. Fermilab will act as the CMS Tier-1 center for the
US and make experiment data available to more than 400 researchers in the US
participating in the CMS experiment. The US CMS Users Facility group, based at
Fermilab, has initiated a project to develop a model for optimizing m
... More
Presented by A. BOBYSHEV
on
28 Sep 2004
at
10:00
WIRED 4 is a experiment independent event display plugin module
for JAS 3 (Java Analysis Studio) generic analysis framework.
Both WIRED and JAS are written in Java.
WIRED, which uses HepRep (HEP Representables for Event Display) as its input
format, supports viewing of events using either conventional 3D projections
as well as specialized projections such as a fish-eye or a rho-Z projecti
... More
Presented by M. DONSZELMANN
on
30 Sep 2004
at
16:30
Presented by Wolfgang VON RUEDEN
on
27 Sep 2004
at
09:00
Large, distributed HEP collaborations, such as D0, CDF and US-CMS,
depend on stable and robust network paths between major world
research centers. The evolving emphasis on data and compute Grids
increases the reliance on network performance.
FermiLab's experimental groups and network support personnel
identified a critical need for WAN monitoring to ensure the quality
and efficient utiliza
... More
Presented by Mr. M. GRIGORIEV
on
30 Sep 2004
at
15:40
JAS3 is a general purpose, experiment independent, open-source, data analysis tool.
JAS3 includes a variety of features, including histograming, plotting, fitting,
data access, tuple analysis, spreadsheet and event display capabilities. More
complex analysis can be performed using several scripting languages (pnuts, jython,
etc.), or by writing Java analysis classes. All of these features
... More
Presented by Mark DONSZELMANN
on
30 Sep 2004
at
18:10
Till now, ROOT objects can be stored only in a binary ROOT specific file format.
Without the ROOT environment the data stored in such files are not directly
accessible. Storing objects in XML format makes it easy to view and edit (with some
restriction) the object data directly. It is also plausible to use XML as exchange
format with other applications. Therefore XML streaming has been imp
... More
Presented by S. LINEV
on
29 Sep 2004
at
15:20
Type: poster
Session:
Poster Session 2
Track: Track 5 - Distributed Computing Systems and Experiences
This paper describes XTNetFile, the client side of a project
conceived to address the high demand data access needs of modern
physics experiments such as BaBar using the ROOT framework. In this
context, a highly scalable and fault tolerant client/server
architecture for data access has been designed and deployed which
allows thousands of batch jobs and interactive sessions to
effective
... More
Presented by F. FURANO
on
29 Sep 2004
at
10:00
The dCache software system has been designed to manage a
huge amount of individual disk storage nodes and let them
appear under a single file system root. Beside a variety
of other features, it supports the GridFtp dialect, implements
the Storage Resource Manager interface (SRM V1) and can be linked
against the CERN GFAL software layer. These abilities makes
dCache a perfect Storage Elemen
... More
Presented by P. FUHRMANN
on
29 Sep 2004
at
16:50
