Dr
Gabriele Garzoglio
(FERMI NATIONAL ACCELERATOR LABORATORY)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
In recent years, it has become more and more evident that software threat communities are taking an
increasing interest in Grid infrastructures. To mitigate the security risk associated with the increased numbers of attacks, the Grid software development community needs to scale up effort to reduce software vulnerabilities. This can be achieved by introducing security review processes as a...
Dr
Sanjay Padhi
(UCSD)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
This paper presents a web based Job Monitoring framework for individual Grid sites that allows users to follow in detail their jobs in quasi-real time. The framework consists of several independent components, (a) a set of sensors that run on the site CE and worker nodes and update a database, (b) a simple yet extensible web services framework and (c) an Ajax powered web interface having a...
Dr
David Lawrence
(Jefferson Lab)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
A minimal xpath 1.0 parser has been implemented within the JANA framework that
allows easy access to attributes or tags in an XML document. The motivating
implmentation was to access geometry information from XML files in
the HDDS specification (derived from ATLAS's AGDD). The system allows
components in the reconstruction package to pick out individual numbers
from a collection of XML...
Daniel Colin Van Der Ster
(Conseil Europeen Recherche Nucl. (CERN))
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Ganga provides a uniform interface for running ATLAS user analyses on a number of local, batch, and grid backends. PanDA is a pilot-based production and distributed analysis system developed and used extensively by ATLAS. This work presents the implementation and usage experiences of a PanDA backend for Ganga. Built upon reusable application libraries from GangaAtlas and PanDA, the Ganga PanDA...
Mr
Andrey TSYGANOV
(Moscow Physical Engineering Inst. (MePhI))
23/03/2009, 08:00
Software Components, Tools and Databases
poster
CERN, the European Laboratory for Particle Physics, located in Geneva - Switzerland, has recently started the Large Hadron Collider (LHC), a 27 km particle accelerator. The CERN Engineering and Equipment Data Management Service (EDMS) provides support for managing engineering and equipment information throughout the entire lifecycle of a project. Based on several both in-house developed and...
Dr
Suren Chilingaryan
(The Institute of Data Processing and Electronics, Forschungszentrum Karlsruhe)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
During operation of high energy physics experiments a big amount of slow control data is recorded. It is necessary to examine all collected data checking the integrity and validity of measurements. With growing maturity of AJAX technologies it becomes possible to construct sophisticated interfaces using web technologies only.
Our solution for handling time series, generally slow control...
Dr
David Lawrence
(Jefferson Lab)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Factory models are often used in object oriented
programming to allow more complicated and controlled
instantiation than is easily done with a standard C++ constructor.
The alternative factory model implemented in the
JANA event processing framework addresses issues of
data integrity important to the type of reconstruction
software developed for experimental HENP. The data on...
Ms
Gerhild Maier
(Johannes Kepler Universität Linz)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Grid computing is associated with a complex, large scale, heterogeneous and distributed environment. The combination of different Grid infrastructures, middleware implementations, and job submission tools into one reliable production system is a challenging task. Given the impracticability to provide an absolutely fail-safe system, strong error reporting and handling is a crucial part of...
Dr
David Malon
(Argonne National Laboratory), Dr
Peter Van Gemmeren
(Argonne National Laboratory)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
At a data rate of 200 hertz, event metadata records ("TAGs," in ATLAS parlance)
provide fertile grounds for development and evaluation of tools for scalable data mining.
It is easy, of course, to apply HEP-specific selection or classification rules to event records
and to label such an exercise "data mining," but our interest is different.
Advanced statistical methods and tools such as...
José Mejia
(Rechenzentrum Garching)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The ATLAS computing Grid consists of several hundred compute clusters distributed around the world as part of the Worldwide LHC Computing Grid (WLCG). The Grid middleware and the ATLAS software which has to be installed on each site, often require certain Linux distribution and sometimes even specific version thereof.
On the other hand, mostly due to maintenance reasons, computer centres...
Dr
John Kennedy
(LMU Munich)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The organisation and operations model of the ATLAS T1-T2 federation/cloud associated to the GridKa T1
in Karlsruhe is described. Attention is paid to cloud level services and the experience gained during
the last years of operation.
The ATLAS GridKa Cloud is large and divers spanning 5 countries, 2 ROC's and is currently comprised of 13
core sites. A well defined and tested operations...
Lassi Tuura
(Northeastern University)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The CMS experiment at the Large Hadron Collider has deployed numerous web-based services in order to serve the collaboration effectively. We present the two-phase authentication and authorisation system in use in the data quality and computing monitoring services, and in the data- and workload management services. We describe our techniques intended to provide a high level of security with...
Marco Clemencic
(European Organization for Nuclear Research (CERN))
23/03/2009, 08:00
Software Components, Tools and Databases
poster
An extensive test suite is the first step towards the delivery of robust software, but it is not always easy to implement it, especially in projects with many developers. An easy to use and flexible infrastructure to use to write and execute the tests reduces the work each developer has to do to instrument his packages with tests. At the same time, the infrastructure gives the same look and...
Mr
Ricardo Manuel Salgueiro Domingues da Silva
(CERN)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
A frequent source of concern for resource providers is the efficient use of computing resources in their centres. This has a direct impact on requests for new resources.
There are two different but strongly correlated aspects to be
considered: while users are mostly interested in a good turn-around time for their jobs, resource providers are mostly interested in a high and efficient usage...
Alessandro De Salvo
(Istituto Nazionale di Fisica Nucleare Sezione di Roma 1)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The measurement of the experiment software performances is a very important metric in order to choose the most effective resources to be used and to discover the bottlenecks of the code implementation.
In this work we present the benchmark techniques used to measure the ATLAS software performance through the ATLAS offline testing engine Kit Validation and the online portal Global Kit...
Dr
Florian Uhlig
(GSI Darmstadt)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
One of the challenges of software development for large experiments is to
manage the contributions from globally distributed teams. In order to keep
the teams synchronized a strong quality control is important.
For a software project this means that it has to be tested on all
supported platforms if the project can be build from source,
if it runs and in the end if the program delivers the...
Witold Pokorski
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
We present the new monitoring system for CASTOR (CERN Advanced
STORage) which allows an integrated view on all the different storage
components. With the massive data-taking phase approaching, CASTOR is
one of the key elements of the software needed by the LHC
experiments. It has to provide a reliable storage machinery for saving
the event data, as well as to enable an efficient...
Dr
Antonio Pierro
(INFN-BARI)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The web application service as part of the conditions database system serves applications and users outside the event-processing. The application server is built upon conditions python API in the CMS offline software framework. It responds to http requests on various conditions database instances. The main client of the application server is the conditions database web GUI which currently...
Edward Karavakis
(Brunel University-CERN)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Dashboard is a monitoring system developed for the LHC experiments in order to provide the view of the Grid infrastructure from the perspective of the Virtual Organisation. The CMS Dashboard provides a reliable monitoring system that enables the transparent view of the experiment activities across different middleware implementations and combines the Grid monitoring data with information that...
Lassi Tuura
(Northeastern University)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
A central component of the data quality monitoring system of the CMS experiment at the Large Hadron Collider is a web site for browsing data quality histograms. The production servers in data taking provide access to several hundred thousand histograms per run, both live in online as well as for up to several terabytes of archived histograms for the online data taking, Tier-0 prompt...
Natalia Ratnikova
(Fermilab-ITEP(Moscow)-Karlsruhe University(Germany))
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The CMS Software project CMSSW embraces more than a thousand packages organized in over a hundred subsystems covering the areas of analysis, event display, reconstruction, simulation, detector description, data formats, framework, utilities and tools. The release integration process is highly automated, using tools developed or adopted by CMS. Packaging in rpm format is a built-in step in the...
Mr
Shahzad Muzaffar
(NORTHEASTERN UNIVERSITY)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The CMS offline software consists of over two million lines of code actively developed by hundreds of developers from all around the world. Optimal builds and distribution of such a large scale system for production and analysis activities for hundreds of sites and multiple platforms are major challenges. Recent developments have not only optimized the whole process but also helped us identify...
Dr
Thomas Kress
(RWTH Aachen, III. Physikal. Institut B)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The Tier-2 centers in CMS are the only location, besides the specialized analysis facility at CERN, where users are able to obtain guaranteed access to CMS data samples. The Tier-1 centers are used primarily for organized processing and storage. The Tier-1s are specified with data export and network capacity to allow the Tier-2 centers to refresh the data in disk storage regularly for...
Dr
Ajit Kumar Mohapatra
(University of Wisconsin, Madison, USA)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The CMS experiment has been using the Open Science Grid, through its US Tier-2 computing centers, from its very beginning for production of Monte Carlo simulations. In this talk we will describe the evolution of the usage patterns indicating the best practices that have been identified. In addition to describing the production metrics and how they have been met, we will also present the...
Dr
Alessandra Fanfani
(on beahlf of CMS - INFN-BOLOGNA (ITALY))
23/03/2009, 08:00
Distributed Processing and Analysis
poster
CMS has identified the distributed Tier-2 sites as the primary location for physics analysis. There is a specialized analysis cluster at CERN, but it represents approximately 15% of the total computing available to analysis users. The more than 40 Tier-2s on 4 continents will provide analysis computing and user storage resources for the vast majority of physicists in CMS. The CMS estimate is...
Andrea Valassi
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The COOL project provides software components and tools for the handling of the LHC experiment conditions data. The project is a collaboration between the CERN IT Department and Atlas and LHCb, the two experiments that have chosen it as the base of their conditions database infrastructure. COOL supports persistency for several relational technologies (Oracle, MySQL and SQLite), based on the...
Prof.
Kihyeon Cho
(KISTI)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
KISTI (Korea Institute of Science and Technology Information) in Korea is the national headquarter of supercomputer, network, Grid and e-Science. We have been working on cyberinfrastructure for high energy physics experiment, especially CDF experiment and ALICE experiment. We introduce the cyberinfrastructure which includes resources, Grid and e-Science for these experiments. The goal of...
Cédric Serfon
(LMU München)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
A set of tools have been developed to ensure the Data Management operations (deletion, movement of data within a site and consistency checks) within the German cloud for ATLAS. These tools that use local protocols which allow a fast and efficient processing are described hereafter and presented in the context of the operational procedures of the cloud. A particular emphasis is put on the...
Dr
Ashok Agarwal
(University of Victoria, Victoria, BC, Canada)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
An interface between dCache and the local Tivoli Storage Manager (TSM) tape storage facility has been developed at the University of Victoria (UVic) for High Energy Physics (HEP) applications. The interface is responsible for transferring the data from disk pools to tape and retrieving data from tape to disk pools. It also checks the consistency between the PNFS filename space and the TSM...
Dirk Hufnagel
(Conseil Europeen Recherche Nucl. (CERN))
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The CMS Tier 0 is responsible for handling the data in the first period of it's life, from being written to a disk buffer at the CMS experiment site in Cessy by the DAQ system, to the time transfer completes from CERN to one of the Tier1 computing centres. It contains all automatic data movement, archival and processing tasks run at CERN. This includes the bulk transfers of data from Cessy to...
Mr
Adrian Casajus Ramo
(Departament d' Estructura i Constituents de la Materia)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
DIRAC, the LHCb community Grid solution, provides access to a vast amount of computing and storage resources to a large number of users. In DIRAC users are organized in groups with different needs and permissions. In order to ensure that only allowed users can access the resources and to enforce that there are no abuses, security is mandatory. All DIRAC services and clients use secure...
Galina Shabratova
(Joint Inst. for Nuclear Research (JINR))
23/03/2009, 08:00
Distributed Processing and Analysis
poster
A. Bogdanov3, L. Malinina2, V. Mitsyn2, Y. Lyublev9, Y. Kharlov8, A. Kiryanov4,
D. Peresounko5, E.Ryabinkin5, G. Shabratova2 , L. Stepanova1, V. Tikhomirov3,
W. Urazmetov8, A.Zarochentsev6, D. Utkin2, L. Yancurova2, S. Zotkin8
1 Institute for Nuclear Research of the Russian, Troitsk, Russia;
2 Joint Institute for Nuclear Research, Dubna, Russia;
3 Moscow Engineering Physics Institute,...
Predrag Buncic
(CERN)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Infrastructure-as-a-Service (IaaS) providers allow users to easily acquire on-demand computing and storage resources. For each user they provide an isolated environment in the form of Virtual Machines which can be used to run services and deploy applications. This approach, also known as 'cloud computing', has proved to be viable for a variety of commercial applications. Currently there are...
Mr
omer khalid
(CERN)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Omer Khalid, Paul Nillson, Kate Keahey, Markus Schulz
---
Given the profileration of virtualization technology in every technological domain, we have been investigating on enabling virtualization in the LCG Grid to bring in virtualization benefits such as isolation, security and environment portability using virtual machines as job execution containers.
There are many different ways to...
Paul Rossman
(Fermi National Accelerator Lab. (Fermilab))
23/03/2009, 08:00
Distributed Processing and Analysis
poster
CMS utilizes a distributed infrastructure of computing centers to custodially store data, to provide organized processing resources, and to provide analysis computing resources for users. Integrated over the whole system, even in the first year of data taking, the available disk storage approaches 10 peta bytes of space. Maintaining consistency between the data bookkeeping, the data transfer...
Matevz Tadel
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
EVE is a high-level visualization library using ROOT's data-processing, GUI and OpenGL interfaces. It is designed as a framework for object management offering hierarchical data organization, object interaction and visualization via GUI and OpenGL representations. Automatic creation of 2D projected views is also supported. On the other hand, it can serve as an event visualization toolkit...
Prof.
Roger Jones
(Lancaster University)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Despite the all too brief availability of beam-related data, much has been learned about the usage patterns and operational requirements of the ATLAS computing model since Autumn 2007. Bottom-up estimates are now more detailed, and cosmic ray running has exercised much of the model in both duration and volume. Significant revisions have been made in the resource estimates, and in the usage of...
Claudio Grandi
(INFN Bologna)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The CMS Collaboration relies on 7 globally distributed Tier-1 computing centers located at large universities and national laboratories for a second custodial copy of the CMS RAW data and primary copy of the simulated data, data serving capacity to Tier-2 centers for analysis, and the bulk of the reprocessing and event selection capacity in the experiment. The Tier-1 sites have a challenging...
Dr
Tomasz Wlodek
(Brookhaven National Laboratory (BNL)), Dr
Yuri Smirnov
(Brookhaven National Laboratory (BNL))
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The PanDA distributed production and analysis system has been in
production use for ATLAS data processing and analysis since late 2005
in the US, and globally throughout ATLAS since early 2008. Its core
architecture is based on a set of stateless web services served by
Apache and backed by a suite of MySQL databases that are the
repository for all Panda information: active and archival...
Juraj Sucik
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
CERN has a successful experience with running Server Self Service Center
(S3C) for virtual server provisioning which is based on Microsoft Virtual
Server 2005. With the introduction of Window Server 2008 and its built-in hypervisor based virtualization (Hyper-V) there are new possibilities for the expansion of the current service.
Observing a growing industry trend of provisioning Virtual...
Mr
Michele De Gruttola
(INFN, Sezione di Napoli - Universita & INFN, Napoli/ CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Reliable population of the condition database is critical for the correct operation of the online selection as well as of the offline reconstruction and analysis of data.
We will describe here the system put in place in the CMS experiment to populate the database and make condition data promptly available online for the high-level trigger and offline for reconstruction.
The system has been...
Loic Quertenmont
(Universite Catholique de Louvain)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
FROG is a generic framework dedicated to visualize events in a given geometry. \newline
It has been written in C++ and use OpenGL cross-platform libraries. It can be used to any particular physics experiment or detector design. The code is very light and very fast and can run on various Operating System. Moreover, FROG is self consistent and does not require installation of ROOT or...
Victor Diez Gonzalez
(Univ. Rov. i Virg., Tech. Sch. Eng.-/CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Geant4 is a toolkit to simulate the passage of particles through
matter, and is widely used in HEP, in medical physics and for space
applications. Ongoing developments and improvements require regular
integration testing for new or modified code.
The current system uses a customised version of the Bonsai Mozilla tool
to collect and select tags for testing, a set of shell and...
Mr
Laurent GARNIER
(LAL-IN2P3-CNRS)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Qt is a powerfull cross-platform application framework , powerful, free (even on Windows), used by lots of people and applications.
That's why, last developments in Geant4 visualization group come with a new driver, based on Qt toolkit. Qt library has OpenGL available, then all 3D scenes could be move by mouse (like in OpenInventor driver).
This driver try to resume all the features already...
Mr
Luiz Henrique Ramos De Azevedo Evora
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
During the operation, maintenance, and dismantling periods of the ATLAS Experiment, the traceability of all detector equipment must be guaranteed for logistic and safety matters. The running of the Large Hadron Collider will expose the ATLAS detector to radiation. Therefore, CERN shall follow specific regulation from French and Swiss authorities for equipment removal, transport, repair, and...
Dr
Jose Caballero
(Brookhaven National Laboratory (BNL))
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Worker nodes on the grid exhibit great diversity, making it difficult to offer uniform processing resources. A pilot job architecture, which probes the environment on the remote worker node before pulling down a payload job, can help. Pilot jobs become smart wrappers, preparing an appropriate environment for job execution and providing logging and monitoring capabilities.
PanDA (Production...
Dr
Bogdan Lobodzinski
(DESY, Hamburg,Germany)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The H1 Collaboration at HERA has entered the period of high precision analyses based on the final data sample. These analyses require a massive production of simulated Monte Carlo (MC) events.
The H1 MC framework is a software for mass MC production on the LCG Grid infrastructure
and on a local batch system created by H1 Collaboration.
The aim of the tool is a full automatization of the...
Dr
Sebastian Böser
(University College London)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Within the last years, the HepMC data format has established itself as the
standard data format for simulation of high-energy physics interactions and is
commonly used by all four LHC experiments. At the energies of the
proton-proton collisisions at the LHC, a full description of the generation of
these events and the subsequent interactions with the detector typically
involves several...
Axel Naumann
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
C++ does not offer access to reflection data: the types and their members as well as their memory layout are not accessible. Reflex adds that: it can be used to describe classes and any other types, to lookup and call functions, to lookup and access data members, to create and delete instances of types. It is rather unique and attracts considerable interest also outside of high energy...
Dr
David Dykstra
(Fermilab)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The CMS experiment requires worldwide access to conditions data by nearly a hundred thousand processing jobs daily. This is accomplished using a software subsystem called Frontier. This system translates database queries into http, looks up the results in a central database at CERN, and caches the results in an industry-standard http proxy/caching server called Squid. One of the most...
Dr
Hartmut Stadie
(Universität Hamburg)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
While the Grid infrastructure for the LHC experiments is well suited for batch-like analysis, it does not support the final steps of an analysis on a reduced data set, e.g. the optimization of cuts and derivation of the final plots. Usually this part is done interactively. However, for the LHC these steps might still require a large amount of data. The German "National Analysis Facility"(NAF)...
Dr
Vladimir Korenkov
(Joint Institute for Nuclear Research (JINR))
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Different monitoring systems are now extensively used to keep an eye on
real time state of each service of distributed grid infrastructures and
jobs running on the Grid. Tracking current services’ state as well as
the history of state changes allows rapid error fixing, planning future
massive productions, revealing regularities of Grid operation and many
other things. Along with...
Marco Mambelli
(UNIVERSITY OF CHICAGO)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The ATLAS experiment is projected to collect over one billion events/year during the first few years of operation.
The efficient selection of events for various physics analyses across all appropriate samples presents a significant technical challenge.
ATLAS computing infrastructure...
Dr
Pavel Nevski
(BNL)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
In addition to challenges on computing and data handling, ATLAS and other
LHC experiments place a great burden on users to configure and manage the
large number of parameters and options needed to carry out distributed
computing tasks.
Management of distribute physics data is being made more transparent by
dedicated ATLAS grid computing technologies, such as PanDA (a pilot-based
job...
Prof.
Marco Cattaneo
(CERN)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
LHCb had been planning to commission its High Level Trigger software and Data Quality monitoring procedures using real collisions data from the LHC pilot run. Following the LHC incident on 19th September 2008, it was decided to commission the system using simulated data.
This “Full Experiment System Test” consists of:
- Injection of simulated minimum bias events into the full HLT farm,...
Luciano Piccoli
(Fermilab)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Large computing clusters used for scientific processing suffer from systemic failures when operated over long continuous periods for executing workflows. Diagnosing job problems and faults leading to eventual failures in this complex environment is difficult, specifically when the success of whole workflow might be affected by a single job failure.
In this paper, we introduce a model-based,...
Alexey Zhelezov
(Physikalisches Institut, Universitaet Heidelberg)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
LHC experiments are producing very large volumes of data either accumulated from the detectors or generated via the Monte-Carlo modeling. The data should be processed as quickly as possible to provide users with the input for their analysis. Processing of multiple hundreds of terabytes of data necessitates generation, submission and following a huge number of grid jobs running all over the...
Noriza Satam
(Department of Mathematics, Faculty of Science,Universiti Teknologi Malaysia),
Norma Alias
(Institute of Ibnu Sina, Universiti Teknologi Malaysia,)
23/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
New Iterative Alternating Group Explicit (NAGE) is a powerful parallel numerical algorithm for multidimensional temperature prediction. The discretization is based on the finite difference method of partial differential equation (PDE) with parabolic type. The 3-Dimensional temperature visualization is critical since it’s involves large scale of computational complexity. The three fundamental...
Mr
Andrew Baranovski
(FNAL)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
In a shared computing environment, activities orchestrated by workflow management systems often need to span organizational and ownership domains. In such a setting, common tasks, such as the collection and display of metrics and debugging information, are challenged by the informational entropy inherent to independently maintained and owned software sub-components. Because such information...
Benjamin Gaidioz
(CERN)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The ATLAS production system is one of the most critical components in the experiment's distributed system, and this becomes even more true now that real data has entered the scene.
Monitoring such a system is a non trivial task, even more when two of its main characteristics are the flexibility in the submission of job processing units and the heterogeneity of the resources it uses.
In...
Dr
Xavier Espinal
(PIC/IFAE)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The ATLAS distributed computing activities involve about 200 computing centers distributed world-wide and need people on shift covering 24 hours per day. Data distribution, data reprocessing, user analysis and Monte Carlo event simulation runs continuously. Reliable performance of the whole ATLAS computing community is of crucial importance to meet the ambitious physics goals of the ATLAS...
Alexander Undrus
(BROOKHAVEN NATIONAL LABORATORY, USA)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The system of automated multi-platform software nightly builds is a major
component in ATLAS collaborative software organization and code approval
scheme. Code developers from more than 30 countries use about 25
branches of nightly releases for testing new packages, validation of patches to
existing software, and migration to new platforms and compilers. The successful
nightly releases...
Dr
Philippe Calfayan
(Ludwig-Maximilians-University Munich)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The PROOF (Parallel ROOT Facility) library is designed to perform parallelized
ROOT-based analyses with a heterogeneous cluster of computers.
The installation, configuration and monitoring of PROOF have been carried out
using the Grid-Computing environments dedicated to the ATLAS experiment.
A PROOF cluster hosted at the Leibniz Rechenzentrum (LRZ) and consisting of a
scalable amount of...
Dr
Alfio Lazzaro
(Universita and INFN, Milano / CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
MINUIT is the most common package used in high energy physics for numerical minimization of multi-dimensional functions. The major algorithm of this package, MIGRAD, searches for the minimum by using the gradient function. For each minimization iteration, MIGRAD requires the calculation of the first derivatives for each parameter of the function to be minimized.
Minimization is required for...
Dr
Niklaus Berger
(Institute for High Energy Physics, Beijing)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Partial wave analysis is an important tool for determining resonance properties in hadron spectroscopy. For large data samples however, the un-binned likelihood fits employed are computationally very expensive. At the Beijing Spectrometer (BES) III experiment, an increase in statistics compared to earlier experiments of up to two orders of magnitude is expected. In order to allow for a timely...
Alexandre Vaniachine
(Argonne National Laboratory),
David Malon
(Argonne National Laboratory),
Jack Cranshaw
(Argonne National Laboratory),
Jérôme Lauret
(Brookhaven National Laboratory),
Paul Hamill
(Tech-X Corporation),
Valeri Fine
(Brookhaven National Laboratory)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
High Energy and Nuclear Physics (HENP) experiments store petabytes of event data and terabytes of calibrations data in ROOT files. The Petaminer project develops a custom MySQL storage engine to enable the MySQL query processor to directly access experimental data stored in ROOT files.
Our project is addressing a problem of efficient navigation to petabytes of HENP experimental data...
Mr
Igor Sfiligoi
(Fermilab)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Distributed computing, and in particular Grid computing, enables physicists to use thousands of CPU days worth of computing every day, by submitting thousands of compute jobs.
Unfortunately, a small fraction of such jobs regularly fail; the reasons vary from disk and network problems to bugs in the user code. A subset of these failures result in jobs being stuck for long periods of time. In...
Marco Clemencic
(European Organization for Nuclear Research (CERN))
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The LHCb software, from simulation to user analysis, is based on the framework Gaudi. The extreme flexibility that the framework provides, through its component model and the system of plug-ins, allows us to define a specific application as its behavior more than its code. The application is then described by some configuration files read by the bootstrap executable (shared by all...
Ms
Elena Oliver
(Instituto de Fisica Corpuscular (IFIC) - Universidad de Valencia)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The ATLAS data taking is due to start in Spring 2009. In this contribution and given the expectation, a rigorous evaluation of the readiness parameters of the Spanish ATLAS
Distributed Tier-2 is given.
Special attention will be paid to the readiness to perform Physics Analysis from different
points of view: Network Efficiency, Data Discovery, Data Management, Production of...
Mr
Olivier Couet
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The ROOT framework provides many visualization techniques. Lately several new ones have been implemented. This poster will present all the visualization techniques ROOT provides highlighting the best use one can do of each of them.
Prof.
Gordon Watts
(UNIVERSITY OF WASHINGTON)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
ROOT.NET provides an interface between Microsoft’s Common Language Runtime (CLR) and .NET technology and the ubiquitous particle physics analysis tool, ROOT. This tool automatically generates a series of efficient wrappers around the ROOT API. Unlike pyROOT, these wrappers are statically typed and so are highly efficient as compared to the Python wrappers. The connection to .NET means that one...
Mr
romain wartel
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Different computing grids may provide services to the same user
community, and in addition, a grid resource provider may share its
resources across different unrelated user communities.
Security incidents are therefore increasingly prone to propagate from
one resource center to the another, either via the user community or via
cooperating grid infrastructures.
As a result, related and...
Mr
Jan KAPITAN
(Nuclear Physics Inst., Academy of Sciences, Praha)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
High Energy Nuclear Physics (HENP) collaborations’ experience show that the computing resources available from a single site are often not sufficient nor satisfy the need of remote collaborators eager to carry their analysis in the fastest and most convenient way. From latencies in the network connectivity to the lack interactivity, having fully functional software stack on local resources is...
Ms
Jaroslava Schovancova
(Institute of Physics, Prague), Dr
Jiri Chudoba
(Institute of Physics, Prague)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The Pierre Auger Observatory studies ultra-high energy cosmic rays.
Interactions of these particles with the nuclei of air gases at energies
many orders of magnitude above the current accelerator capabilities induce
unprecedented extensive air showers in the atmosphere. Different interaction
models are used to describe the first interactions in such showers and their
predictions are...
Dr
Simon Metson
(H.H. Wills Physics Laboratory)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
In a collaboration the size of CMS (approx. 3000 users, and almost 100 computing centres of varying size) communication and accurate information about the sites it has access to is vital in co-ordinating the multitude of computing tasks required for smooth running. SiteDB is a tool developed by CMS to track sites available to the collaboration, the allocation to CMS of resources available at...
Dr
Ricardo Graciani Diaz
(Universidad de Barcelona)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The usage of CPU resources by LHCb on the Grid id dominated by two different applications: Gauss and Brunel. Gauss the application doing the Monte Carlo simulation of proton-proton collisions. Brunel is the application responsible for the reconstruction of the signals recorded by the detector converting them into objects that can be used for later physics analysis of the data (tracks,...
Dr
Dagmar Adamova
(Nuclear Physics Institute AS CR)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
Czech Republic (CR) has been participating in the LHC Computing Grid
project (LCG) ever since 2003 and gradually, a middle-sized Tier2 center
has been built in Prague, delivering computing services for national HEP
experiments groups including the ALICE project at the LHC. We present a
brief overview of the computing activities and services being performed in
the CR for the ALICE...
Pier Paolo Ricci
(INFN CNAF)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
In the framework of WLCG, the Tier-1 computing centres have very stringent requirements in the sector of the data storage, in terms of size, performance and reliability.
Since some years, at the INFN-CNAF Tier-1 we have been using two distinct storage systems: Castor as tape-based storage solution (also known as the
D0T1 storage class in the WLCG language) and the General Parallel File...
Mr
Matti Kortelainen
(Helsinki Institute of Physics)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
We study the performance of different ways of running a physics analysis in preparation for the analysis of petabytes of data in the LHC era. Our test cases include running the analysis code in a Linux cluster with a single thread in ROOT, with the Parallel ROOT Facility (PROOF), and in parallel via the Grid interface with the ARC middleware. We use of the order of millions of Pythia8...
Dr
Monica Verducci
(INFN Roma)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The ATLAS Muon Spectrometer is the outer part of the ATLAS detector at LHC. It has been designed to detect charged particles exiting the barrel and end-cap calorimeters and to measure their momentum in the pseudorapidity range |η| < 2.7. The challenge performance in momentum measurements needs an accurate monitoring of detector and calibration parameters and an high complex architecture to...
Pedro Salgado
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The ATLAS Distributed Data Management system, Don Quijote2 (DQ2), has
been in use since 2004.
Its goal is to manage tens of petabytes of data per year, distributed
among the WLCG.
One of the most critical components of DQ2 is the central catalogues
which comprises a set of web services with a database back-end and a
distributed memory object caching system.
This component has proven to...
Dr
Vincent Garonne
(CERN)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The DQ2 Distributed Data Management system is the system developed and used by ATLAS for handling very large datasets. It encompasses data bookkeeping, managing of largescale production transfers as well as endusers
data access requests.
In this paper, we will describe the design and implementation of the DQ2 accounting service. It collects different data usage informations in order to show...
Dr
Solveig Albrand
(LPSC)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
AMI is the main interface for searching for ATLAS datasets using physics metadata criteria.
AMI has been implemented as a generic database management framework which allows parallel searching over many catalogues, which may have differing schema, and may be distributed geographically, using different RDBMS.
The main features of the web interface will be described; in particular the powerful...
Florbela Viegas
(CERN)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The TAG files store summary event quantities that allow a quick selection of interesting events.
This data will be produced at a nominal rate of 200 Hz, and is uploaded into a relational database for access from websites and other tools.
The estimated database volume is 6TB per year, making it the largest application running on the ATLAS relational databases, at CERN and at other voluntary...
Dr
Daniele Bonacorsi
(Universita & INFN, Bologna)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The CMS Facilities and Infrastructure Operations group is responsible for providing and maintaining a working distributed computing fabric with a consistent working environment for Data operations and the physics user community. Its mandate is to maintain the core CMS computing services; ensure the coherent deployment of Grid or site specific components (such as workload management, file...
Dr
Lee Lueking
(FERMILAB)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The CMS experiment has implemented a flexible and powerful approach enabling users to find data within the CMS physics data catalog. The Dataset Bookkeeping Service (DBS) comprises a database and the services used to store and access metadata related to its physics data. In addition to the existing WEB based and programmatic API, a generalized query system has been designed and built. This...
Dr
Andrea Sartirana
(INFN-CNAF)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The CMS experiment is preparing for data taking in many computing activities, including the testing, deployment and operation of various storage solutions to support the computing workflows of the experiment. Some Tier-1 and Tier-2 centers supporting the collaboration are deploying and commissioning StoRM storage systems. That is, posix-based disk storage systems on top of which StoRM...
Zoltan Mathe
(UCD Dublin)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The LHCb Bookkeeping is a system for the storage and retrieval of meta data associated with LHCb datasets. e.g. whether it is real or simulated data, which running period it is associated with, how it was processed and all the other relevant characteristics of the files.
The meta data are stored in an oracle database which is interrogated using services provided by the LHCb DIRAC3...
Hubert Degaudenzi
(European Organization for Nuclear Research (CERN))
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The installation of the LHCb software is handled by a single python script: install_project.py. This bootstrap
script is unique by allowing the installation of software projects on various operating system (Linux, Windows,
MacOSX). It is designed for the LHCb software deployment for a single user or for multiple users, in a shared area or on the Grid. It retrieves the software packages and...
Bertrand Bellenot
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Description of the new implementation of the ROOT browser
Dr
Hubert Degaudenzi
(CERN),
Karol Kruzelecki
(Cracow University of Technology-Unknown-Unknown)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The core software stack both from the LCG Application Area and LHCb consists of more than
25 C++/Fortran/Python projects build for about 20 different configurations on Linux, Windows
and MacOSX. To these projects, one can also add about 20 external software packages (Boost, Python, Qt,
CLHEP, ...) which have also to be build for the same configurations. It order to reduce the
time of...
Ilektra Christidi
(Physics Department - Aristotle Univ. of Thessaloniki)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The ATLAS detector has been designed to exploit the full discovery potential of the LHC proton-proton collider at CERN, at the c.m. energy of 14 TeV. Its Muon Spectrometer (MS) has been optimized to measure final state muons from those interactions with good momentum resolution (3-10% for momentum of 100GeV/c-1TeV/c).
In order to ensure that the hardware, DAQ and reconstruction software of...
Dr
Mine Altunay
(FERMILAB)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Open Science Grid stakeholders invariably depend on multiple
infrastructures to build their community-based distributed systems.
To meet this need, OSG has built new gateways with TeraGrid, Campus
Grids, and Regional Grids (NYSGrid, BrazilGrid). This has brought new
security challenges for the OSG architecture and operations. The
impact of security incidents now has a larger scope and...
Bertrand Bellenot
(CERN)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Description of the ROOT event recorder, a GUI testing and validation tool.
Anar Manafov
(GSI)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
Memory monitoring is a very important part of complex project development.
Open Source tools, such as valgrind, are available for the task, however, their performance penalties make them not suitable for debugging long, CPU-intensive programs, such as reconstruction or simulation. We have developed the TMemStat tool, which, while not providing the full functionality of valgrind, gives...
David Chamont
(Laboratoire Leprince-Ringuet (LLR)-Ecole Polytechnique-Unknown)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The same as many experiments, FERMI is storing its data within ROOT trees. A very common activity of physicists is the tuning of selection criteria which define the events of interest, thus cutting and pruning the ROOT trees so to extract all the data linked to those specific events. It is rather straighforward to write a ROOT script so to skim a single kind of data, for example the...
Dr
Richard Wilkinson
(California Institute of Technology)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
In 2008, the CMS experiment made the transition
from a custom-parsed language for job configuration
to using Python. The current CMS software release
has over 180,000 lines of Python configuration code.
We describe the new configuration system, the
motivation for the change, the transition
itself, and our experiences with the new
configuration language.
Dr
Oliver Gutsche
(FERMILAB)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
The CMS software stack currently consists of more than 2 Million lines of code developed by over 250 authors with a new version being released every week. CMS has setup a release validation process for quality assurance which enables the developers to compare to previous releases and references.
This process provides the developers with reconstructed datasets of real data and MC samples....
Tatsiana Klimkovich
(RWTH Aachen University)
23/03/2009, 08:00
Software Components, Tools and Databases
poster
VISPA is a novel development environment for high energy physics analyses which enables physicists to combine graphical and textual work. A physics analysis cycle consists of prototyping, performing, and verifying the analysis. The main feature of VISPA is a multipurpose window for visual steering of analysis steps, creation of analysis templates, and browsing physics event data at different...
Prof.
Rodriguez Jorge Luis
(Florida Int'l University)
23/03/2009, 08:00
Distributed Processing and Analysis
poster
The CMS experiment will generate tens of petabytes of data per year, data that will be processed, moved and stored in large computing facilities at locations all over the globe. Each of these facilities deploys complex and sophisticated hardware and software components which require dedicated expertise lacking at many of the university and institutions wanting access to the data as soon as it...
Alexander Mazurov
(CERN)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
CASTOR provides a powerful and rich interface for managing files and pools
of files backed by tape-storage. The API is modelled very closely on that of
a POSIX filesystem, where part of the actual I/O part is handled by the rfio
library. While the API is very close to POSIX it is still separated, which
unfortunately makes it impossible to use standard tools and scripts straight
away....
Mr
Aatos Heikkinen
(Helsinki Institute of Physics, HIP)
24/03/2009, 08:00
Event Processing
poster
We present a new Geant4 physics list prepared for nuclear physics applications
in the domain dominated by spallation.
We discuss new Geant4 models based on the translation of
INCL intra-nuclear cascade and ABLA de-excitation codes in C++
and used in the physic list.
The INCL model is well established for targets heavier than Aluminium
and projectile energies from ~ 150 MeV up to 2.5...
Dimosthenis Sokaras
(N.C.S.R. Demokritos, Institute of Nuclear Physics)
24/03/2009, 08:00
Event Processing
poster
Well established values for the X-ray fundamental parameters (fluorescence yields, characteristic lines branching ratios, mass absorption coefficients, etc.) are very important but not adequate for an accurate reference-free quantitative X-Ray Fluorescence (XRF) analysis. Secondary ionization processes following photon induced primary ionizations in matter may contribute significantly to the...
Karsten Koeneke
(Deutsches Elektronen-Synchrotron (DESY))
24/03/2009, 08:00
Event Processing
poster
In the commissioning phase of the ATLAS experiment, low-level Event Summary Data (ESD) are analyzed to evaluate the performance of the individual subdetectors, the performance of the reconstruction and particle identification algorithms, and obtain calibration coefficients. In the GRID model of distributed analysis, these data must be transferred to Tier-1 and Tier-2 sites before they can be...
Dr
Rudi Frühwirth
(Institut fuer Hochenergiephysik (HEPHY)-Oesterreichische Akademi)
24/03/2009, 08:00
Event Processing
poster
Reconstruction of interaction vertices is an essential step in the reconstruction chain of a modern collider experiment such as CMS; the primary ("collision") vertex is reconstructed in every
event within the CMS reconstruction program, CMSSW.
However, the task of finding and fitting secondary ("decay") vertices also plays an important role in several physics cases such as the reconstruction...
Dr
Kilian Schwarz
(GSI)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
GSI Darmstadt is hosting a Tier2 centre for the ALICE experiment providing about 10% of ALICE Tier2 resources. According to the computing model the tasks of a Tier2 centre are scheduled and unscheduled analysis as well as Monte Carlo simulation. To accomplish this a large water cooled compute cluster has been set up and configured consisting of currently 200 CPUs (1500 Cores). After intensive...
Dr
Marian Ivanov
(GSI)
24/03/2009, 08:00
Event Processing
poster
We will present a Particle identification algorithm, as well as a calibration and performance study in the ALICE Time Projection Chamber (TPC) using the dEdx measurement. New calibration algorithms had to be developed, since the simple geometrical corrections were only suitable at 5-10% level. The PID calibration consists of the following parts: gain calibration, energy deposit calibration as...
Dr
Marian Ivanov
(GSI)
24/03/2009, 08:00
Event Processing
poster
We will present our studies of the performance of the reconstruction in the ALICE Time projection chamber (TPC). The reconstruction algorithm in question is based on the Kalman filter. The performance is characterized by the resolution in the position, angle and momenta
as a function of particle properties (momentum, position). The resulting momentum parametrization is compared with the...
Daniel Kollar
24/03/2009, 08:00
Event Processing
poster
The CERN's Large Hadron Collider (LHC) is the world largest particle accelerator. ATLAS is one of the two general purpose experiments equipped with a charge particle tracking system built on two technologies: silicon and
drift tube based detectors, composing the ATLAS Inner Detector (ID). The required precision for the alignment of the most sensitive coordinates of the silicon sensors is just...
Jan Amoraal
(NIKHEF),
Wouter Hulsbergen
(NIKHEF)
24/03/2009, 08:00
Event Processing
poster
We report on an implementation of a global chisquare algorithm
for the simultaneous alignment of all tracking systems in the
LHCb detector. Our algorithm uses hit residuals from the
standard LHCb track fit which is based on a Kalman filter. The
algorithm is implemented in the LHCb reconstruction framework
and exploits the fact that all sensitive detector elements have
the same geometry...
Vitali CHOUTKO
(CERN)
24/03/2009, 08:00
Event Processing
poster
The ROOT based event model for the AMS experiment is presented. By adding few pragmas to the main ROOT code the parallel processing of the ROOT
chains on the local multi-core machines became possible. The scheme does not require any merging of the user defined output information (like histograms, etc). Also no any pre-installation procedure is needed. The scalability of the scheme is...
Dr
Edmund Widl
(Institut für Hochenergiephysik (HEPHY Vienna))
24/03/2009, 08:00
Event Processing
poster
One of the main components of the CMS experiment is the Inner Tracker. This device, designed to measure the trajectories of charged particles, is composed of approximately 16,000 planar silicon detector modules, which makes it the biggest of its kind. However, systematical measurement errors, caused by unavoidable inaccuracies in the construction and assembly phase, reduce the precision of the...
Stefan Kluth
(Max-Planck-Institut für Physik)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
We show how the ATLAS offline software is ported on the Amazon Elastic Compute Cloud (EC2). We prepare an Amazon Machine Image (AMI) on the basis of the standard ATLAS platform Scientific Linux 4 (SL4). Then an instance of the SLC4 AMI is started on EC2 and we install and validate a recent release of the ATLAS offline software distribution kit. The installed software is archived as an image...
Dr
David Lawrence
(Jefferson Lab)
24/03/2009, 08:00
Event Processing
poster
Automatic ROOT tree creation is achived in the JANA
Event Processing Framework through a special plugin.
The janaroot plugin can automatically define a TTree
from the data objects passed though the framework
without using a ROOT dictionary. Details on how this
is achieved as well as possible applications will be
presented.
Robert Petkus
(Brookhaven National Laboratory)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
Gluster, a free cluster file-system scalable to several peta-bytes, is under evaluation at the RHIC/USATLAS Computing Facility. Several production SunFire x4500 (Thumper) NFS servers were dual-purposed as storage bricks and aggregated into a single parallel file-system using TCP/IP as an interconnect. Armed with a paucity of new hardware, the objective was to simultaneously allow traditional...
Dr
Peter Kreuzer
(RWTH Aachen IIIA)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
The CMS CERN Analysis Facility (CAF) was primarily designed to host a large variety of latency-critical workflows. These break down into alignment and calibration, detector commissioning and diagnosis, and high-interest physics analysis requiring fast-turnaround. In addition to the low latency requirement on the batch farm, another mandatory condition is the efficient access to the RAW...
Andrea Di Simone
(INFN Roma2)
24/03/2009, 08:00
Event Processing
poster
Resistive Plate Chambers (RPC) are used in ATLAS to provide the first
level muon trigger in the barrel region. The total size of the system is
about 16000 m2, readout by about 350000 electronic channels.
In order to reach the needed trigger performance, a precise knowledge of
the detector working point is necessary, and the high number of readout
channels calls for severe requirements on...
Dr
Silvia Maselli
(INFN Torino)
24/03/2009, 08:00
Event Processing
poster
The calibration process of the Barrel Muon DT System of CMS as developed and tuned during the recent cosmic data run is presented. The calibration data reduction method, the full work flow of the procedure and final results are presented for real and simulated data.
Mr
James Jackson
(H.H. Wills Physics Laboratory - University of Bristol)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
The UK LCG Tier-1 computing centre located at the Rutherford Appleton Laboratory is responsible for the custodial storage and processing of the raw data from all four LHC experiments; CMS, ATLAS, LHCb and ALICE. The demands of data import, processing, export and custodial tape archival place unique requirements on the mass storage system used. The UK Tier-1 uses CASTOR as the storage...
Rodrigo Sierra Moral
(CERN)
24/03/2009, 08:00
Collaborative Tools
poster
Scientists all over the world collaborate with the CERN laboratory day by day. They must be able to communicate effectively on their joint projects at any time, so telephone conferences become indispensable and widely used. The traditional conference system, managed by 6 switchboard operators, was hosting more than 20000 hours and 5500 conference per year. However, the system needed to be...
Mr
Carlos Ghabrous
(CERN)
24/03/2009, 08:00
Collaborative Tools
poster
As a result of the tremendous development of GSM services over the last years, the number of related services used by organizations has drastically increased. Therefore, monitoring GSM services is becoming a business critical issue in order to be able to react appropriately in case of incident.
In order to provide with GSM coverage all the CERN underground facilities, more than 50 km of...
Dr
Lucas Taylor
(Northeastern U., Boston)
24/03/2009, 08:00
Collaborative Tools
poster
The CMS Experiment at the LHC is establishing a global network of inter-connected "CMS Centres" for controls, operations and monitoring at CERN, Fermilab, DESY and a number of other sites in Asia, Europe, Russia, South America, and the USA.
"ci2i" ("see eye to eye") is a generic Web tool, using Java and Tomcat, for managing: hundreds of displays screens in many locations; monitoring...
Miroslav Siket
(CERN)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
LHC computing requirements are such that the number of CPU and storage nodes, and the complexity of the services to be managed are bringing new challenges. Operations like checking configuration consistency, executing actions on nodes, moving them between clusters etc. are very frequent. These scaling challenges are the basis for CluMan, a new cluster management tool being designed and...
Martin Gasthuber
(DESY)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
Having the first analyses capable data from LHC on the horizon, more
and more sites are facing the question/problem of building a high
efficient analysis facility, for their local physicists, mostly
attached to a Tier2/3. The most important ingredient for such a
facility is the underlying storage system and here the selected option
for the data management and data access system - well...
Mr
Stuart Wakefield
(Imperial College)
24/03/2009, 08:00
Event Processing
poster
ProdAgent is a set of tools to assist in producing various data products such as Monte Carlo simulation, prompt reconstruction, re-reconstruction and skimming
In this paper we briefly discuss the ProdAgent architecture, and focus on the experience in using this system in recent computing challenges, feedback from these challenges, and future work. The computing challenges have proven...
Johanna Fleckner
(CERN / University of Mainz)
24/03/2009, 08:00
Event Processing
poster
T Cornelissen on behalf of the ATLAS inner detector software group
Several million cosmic tracks were recorded during the combined ATLAS runs in Autumn of 2008. Using these cosmic ray events as well as first beam events, the software infrastructure of the inner detector of the ATLAS experiment (pixels and microstrips silicon detectors as well as straw tubes withadditional transition...
Arshak Tonoyan
(CERN)
24/03/2009, 08:00
Event Processing
poster
Looking towards first LHC collisions, the ATLAS detector is being commissioned using all types of physics data available: cosmic rays and events produced during a few days of LHC single beam operations. In addition to putting in place the trigger and data acquisition chains, commissioning of the full software chain is a main goal. This is interesting not only to ensure that the reconstruction,...
David Futyan
(Imperial College, University of London)
24/03/2009, 08:00
Event Processing
poster
The CMS experiment has developed a powerful framework to ensure the
precise and prompt alignment and calibration of its components, which is a major prerequisite to achieve the optimal performance for physics analysis. The prompt alignment and calibration strategy harnesses computing resources both at the Tier-0 site and the CERN Analysis Facility (CAF) to ensure fast turnaround for updating...
Mr
Gheni Abla
(General Atomics)
24/03/2009, 08:00
Online Computing
poster
Increasing utilization of the Internet and convenient web technologies has made the web-portal a major application interface for remote participation and control of scientific instruments. While web-portals have provided a centralized gateway for multiple computational services, the amount of visual output often is overwhelming due to the high volume of data generated by complex scientific...
Sunanda Banerjee
(Fermilab, USA)
24/03/2009, 08:00
Event Processing
poster
CMS is looking forward to tune detector simulation using the forthcoming collision data from LHC. CMS established a task force in February 2008 in order to understand and reconcile the discrepancies observed between the CMS calorimetry simulation and the test beam data recorded during 2004 and 2006. Within this framework, significant effort has been made to develop a strategy of tuning fast...
Robert Petkus
(Brookhaven National Laboratory)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
Over the last (2) years, the USATLAS Computing Facility at BNL has managed a highly performant, reliable, and cost effective dCache storage cluster using SunFire x4500/4540 (Thumper/Thor) storage servers. The design of a discreet storage cluster signaled a departure from a model where storage resides locally on a disk-heavy compute farm. The consequent alteration of data flow mandated a...
Prof.
Gordon Watts
(UNIVERSITY OF WASHINGTON)
24/03/2009, 08:00
Collaborative Tools
poster
Particle physics conferences lasting a week (like CHEP) can have 100’s of talks and posters presented. Current conference web interfaces (like Indico) are well suited to finding a talk by author or by time-slot. However, browsing the complete material in a modern large conference is not user friendly. Browsing involves continually making the expensive transition between HTML viewing and...
Dr
Filippo Costa
(CERN)
24/03/2009, 08:00
Event Processing
poster
ALICE (A Large Ion Collider Experiment) is an experiment at the LHC (Large Hadron Collider) optimized for the study of heavy-ion collisions.
The main aim of the experiment is to study the behavior of strongly interaction matter and quark gluon plasma. In order to be ready for the first real physics interaction, the 18 sub-detectors composing ALICE have been tested using cosmic rays and...
Dr
Martin Aleksa (for the LAr conference committee)
(CERN)
24/03/2009, 08:00
Event Processing
poster
The Liquid Argon (LAr) calorimeter is a key detector component in the ATLAS experiment at the LHC, designed to provide precision measurements of electrons, photons, jets and missing transverse energy. A critical element in the precision measurement is the electronic calibration.
The LAr calorimeter has been installed in the ATLAS cavern and filled with liquid argon since 2006. The...
Mrs
Elisabetta Ronchieri
(INFN CNAF)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
Many High Energy Physics experiments must share and transfer large volumes of data. Therefore, the maximization of data throughput is a key issue, requiring detailed analysis and setup optimization of the underlying infrastructure and services. In Grid computing, the data transfer protocol called GridFTP is widely used for efficiently transferring data in conjunction with various types of file...
Marc Deissenroth,
Marc Deissenroth
(Universität Heidelberg)
24/03/2009, 08:00
Event Processing
poster
We report results obtained with different track-based
algorithms for the alignment of the LHCb detector with first
data. The large-area Muon Detector and Outer Tracker have been
aligned with a large sample of tracks from cosmic rays. The
three silicon detectors --- VELO, TT-station and Inner Tracker
--- have been aligned with beam-induced events from the LHC
injection line. We compare...
Dr
Pablo Cirrone
(INFN-LNS)
24/03/2009, 08:00
Event Processing
poster
Geant4 is a Monte Carlo toolkit describing transport and interaction of particles with matter. Geant4 covers all particles and materials, and its geometry description allows for complex geometries.
Initially focused on high energy applications, the use of Geant4 is growing also in different like radioprotection, dosimetry, space radiation and external radiotherapy with proton and carbon...
Luca Lista
(INFN Sezione di Napoli)
24/03/2009, 08:00
Event Processing
poster
We present a parser to evaluate expressions and boolean selections that is applied on CMS event data for event filtering and analysis purposes. The parser is based on boost spirit grammar definition, and uses Reflex dictionary for class introspections. The parser allows a natural definition of expressions and cuts in users configuration, and provides good run-time performances compared to...
Douglas Orbaker
(University of Rochester)
24/03/2009, 08:00
Event Processing
poster
The experiments at the Large Hadron Collider (LHC) will start their search for answers to some of the remaining puzzles of particle physics in 2008. All of these experiments rely on a very precise Monte Carlo Simulation of the physical and technical processes in the detectors.
A fast simulation has been developed within the CMS experiment, which is between 100-1000 times faster than its...
Lorenzo Moneta
(CERN), Prof.
Nikolai GAGUNASHVILI
(University of Akureyri, Iceland)
24/03/2009, 08:00
Event Processing
poster
Weighted histograms are often used for the estimation of a probability density functions in High Energy Physics. The bin contents of a weighted histogram can be considered as a sum of random variables with random number of terms. A generalization of the Pearson’s chi-square statistics for weighted histograms and for weighted histograms with unknown normalization has been recently proposed...
Mr
Sverre Jarp
(CERN)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
This talk will start by reminding the audience that Moore's law is very much alive. Transistors will continue to double for every new silicon generation every other year. Chip designers are therefore trying every possible "trick" for putting the transistors to good use. The most notable one is to push more parallelism into each CPU: More and longer vectors, more parallel execution units, more...
Prof.
Vladimir Ivantchenko
(CERN, ESA)
24/03/2009, 08:00
Event Processing
poster
The process of multiple scattering of charge particles is an important component of Monte Carlo transport. At high energy it defines deviation of particles from ideal tracks and limitation of spatial resolution. Multiple scattering of low-energy electrons defines energy response and resolution of electromagnetic calorimeters. Recent progress in development of multiple scattering models within...
Ian Gable
(University of Victoria)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
Virtualization technologies such as Xen can be used in order to satisfy the disparate and often incompatible system requirements of different user groups in shared-use computing facilities. This capability is particularly important for HEP applications, which often have restrictive requirements. The use of virtualization adds flexibility, however, it is essential that the virtualization...
Cano Ay
(University of Goettingen)
24/03/2009, 08:00
Event Processing
poster
HepMCAnalyser is a tool for generator validation and comparisons.
It is a stable, easy-to-use and extendable framework
allowing for easy access/integration to generator level analysis.
It comprises a class library with benchmark physics processes to analyse
HepMC generator output and to fill root histogramms. A web-interface is
provided to display all or selected histogramms, compare...
Dr
Federico Calzolari
(Scuola Normale Superiore - INFN Pisa)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
High availability has always been one of the main problems for a data center. Till now high availability was achieved by host per host redundancy, a highly expensive method in terms of hardware and human costs. A new approach to the problem can be offered by virtualization.
Using virtualization, it is possible to achieve a redundancy system for all the services running on a data center. This...
Dr
Steven Aplin
(DESY)
24/03/2009, 08:00
Event Processing
poster
The International Linear Collider is proposed as the next large accelerator project in High Energy Physics. The ILD Detector Concept Study is one of three international groups working on designing a detector to be used at the ILC. The ILD Detector is being optimised to employ the so called Particle Flow paradigm. Such an approach means that hardware alone will not be able to realise the full...
Simon Taylor
(Jefferson Lab)
24/03/2009, 08:00
Event Processing
poster
The future GlueX detector in Hall D at Jefferson Lab is a large acceptance (almost 4pi) spectrometer
designed to facilitate the study of the excitation of the gluonic field
binding quark--anti-quark pairs into mesons.
A large solenoidal magnet will provide a 2.2-Tesla field that will be used
to momentum-analyze the charged particles emerging from a liquid hydrogen
target. The...
Kati Lassila-Perini
(Helsinki Institute of Physics HIP)
24/03/2009, 08:00
Collaborative Tools
poster
Complete and up-to-date documentation is essential for efficient data analysis in a large and complex collaboration like CMS. Good documentation reduces the time spent in problem solving
for users and software developers.
The scientists in our research environment do not necessarily have the interests or skills of professional technical writers. This results in inconsistencies in the...
Radoslav Ivanov
(Unknown)
24/03/2009, 08:00
Collaborative Tools
poster
The status of high-energy physics (HEP) information systems has been jointly analyzed by the libraries of CERN, DESY, Fermilab and SLAC. As a result, the four laboratories have started the INSPIRE project – a new platform built by moving the successful SPIRES features and content, curated at DESY, Fermilab and SLAC, into the open-source CDS Invenio digital library software that was developed...
Mrs
Ianna Osborne
(NORTHEASTERN UNIVERSITY)
24/03/2009, 08:00
Event Processing
poster
Geneva, 10 September 2008. The first beam in the Large Hadron Collider at CERN was successfully steered around the full 27 kilometers of the world¿s most powerful particle accelerator at 10h28 this morning. This historic event marks a key moment in the transition from over two decades of preparation to a new era of scientific discovery. (http://www.interactions.org/cms/?pid=1026796)
From...
Dr
Monica Verducci
(INFN RomaI)
24/03/2009, 08:00
Event Processing
poster
ATLAS is a large multipurpose detector, presently in the final phase of construction at LHC, the CERN Large Hadron Collider accelerator. In ATLAS the muon detection is performed by a huge magnetic spectrometer, built with the Monitored Drift Tube (MDT) technology. It consists of more than 1,000 chambers and 350,000 drift tubes, which have to be controlled to a spatial accuracy better than 10...
Mitja Majerle
(Nuclear Physics institute AS CR, Rez)
24/03/2009, 08:00
Event Processing
poster
Monte Carlo codes MCNPX and FLUKA are used to analyze the experiments on
simplified Accelerator Driven Systems, which are performed at the Joint
Institute for Nuclear Research Dubna. At the experiments, protons or
deuterons with the energy in the GeV range are directed to thick, lead
targets surrounded by different moderators and neutron multipliers. Monte
Carlo simulations of these...
Dr
David Lawrence
(Jefferson Lab)
24/03/2009, 08:00
Event Processing
poster
Multi-threading is a tool that is not only well suited to high statistics
event analysis, but is particularly useful for taking advantage of the
next generation many-core CPUs. The JANA event processing framework has
been designed to implement multi-threading through use of posix
threads. Thoughtful implementation allows reconstruction packages to be
developed that are thread enabled...
Dr
Rosy Nikolaidou
(CEA Saclay)
24/03/2009, 08:00
Event Processing
poster
ATLAS is one of the four experiments at the Large Hadron Collider (LHC) at CERN. This experiment has been designed to study a large range of physics including searches for previously unobserved phenomena such as the Higgs Boson and super-symmetry. The ATLAS Muon Spectrometer (MS) is optimized to measure final state muons in a large momentum range, from a few GeV up to TeV. Its momentum...
Mr
Igor Mandrichenko
(FNAL)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
Fermilab is a high energy physics research lab that maintains a highly dynamic
network which typically supports around 15,000 active nodes.
Due to the open nature of the scientific research conducted at FNAL,
the portion of the network used to support open scientific research
requires high bandwidth connectivity to numerous collaborating institutions
around the world, and must...
Dr
Yaodong CHENG
(Institute of High Energy Physics,Chinese Academy of Sciences)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
Some large experiments at IHEP will generate more than 5 Petabytes of data in the next few years, which brings great challenges for data analysis and storage. CERN CASTOR version 1 was firstly deployed at IHEP in 2003, but now it is difficult to meet the new requirements. Taking into account the issues of management, commercial software etc., we don’t update CASTOR from version 1 to version 2....
Dr
Peter Van Gemmeren
(Argonne National Laboratory)
24/03/2009, 08:00
Event Processing
poster
In ATLAS software, TAGs are event metadata records that can be stored in various technologies, including ROOT files and relational databases. TAGs are used to identify and extract events that satisfy certain selection predicates, which can be coded as SQL-style queries.
Several new developments in file-based TAG infrastructure are presented.
TAG collection files support in-file metadata...
Andreu Pacheco
(IFAE Barcelona),
Davide Costanzo
(University of Sheffield),
Iacopo Vivarelli
(INFN and University of Pisa),
Manuel Gallas
(CERN)
24/03/2009, 08:00
Event Processing
poster
The ATLAS experiment recently entered the data taking phase, with the
focus shifting from software development to validation.
The ATLAS software has to be both robust to process large datasets and
produce the high quality output needed for the experiment scientific
exploitation. The validation process is discussed in this talk,
starting from the validation of the nightly builds and...
Keith Rose
(Dept. of Physics and Astronomy-Rutgers, State Univ. of New Jerse)
24/03/2009, 08:00
Event Processing
poster
The silicon pixel detector in CMS contains approximately 66 million
channels, and will provide extremely high tracking resolution for the experiment. To ensure the data collected is valid, it must be monitored continuously at all levels of acquisition and reconstruction. The Pixel Data Quality Monitoring process ensures that the detector, as well as the data acquisition and reconstruction...
Dr
Alessandra Doria
(INFN Napoli)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
The large potential storage and computing power available in the modern grid and data centre infrastructures enable the development of the next generation grid-based computing paradigm, in which a large number of clusters are interconnected through high speed networks. Each cluster is composed of several or often hundreds of computers and devices each with its own specific role in the grid. In...
Dr
Maria Grazia Pia
(INFN GENOVA)
24/03/2009, 08:00
Event Processing
poster
A R&D project, named NANO5, has been recently launched at INFN to address fundamental methods in radiation transport simulation and revisit Geant4 kernel design to cope with new experimental requirements.
The project, that gathers an international collaborating team, focuses on simulation at different scales in the same environment. This issue requires novel methodological approaches to...
Mr
Danilo Piparo
(Universitaet Karlsruhe)
24/03/2009, 08:00
Event Processing
poster
RSC is a software framework based on the RooFit technology and born for the CMS experiment community, whose scope is to allow the modelling and combination of multiple analysis channels together with the accomplishment of statistical studies. That is performed through a variety of methods described in the literature implemented as classes. The design of these classes is oriented to the...
Dr
Kristian Harder
(RAL)
24/03/2009, 08:00
Event Processing
poster
The luminosity upgrade of the Large Hadron Collider (SLHC) is foreseen starting from 2013. An eventual factor-of-ten increase in LHC statistics will have a major impact in the LHC Physics program. However, the SLHC as well as offering the possibility to increase the physics potential will create an extreme operating environment for the detectors, particularly the tracking devices and the...
Luca Dell'Agnello
(INFN)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
In the framework of WLCG, the Tier-1 computing centres have
very stringent requirements in the sector of the data storage,
in terms of size, performance and reliability.
Since some years, at the INFN-CNAF Tier-1 we have been using
two distinct storage systems: Castor as tape-based storage
solution (also known as the D0T1 storage class in the WLCG language) and the General Parallel...
Dr
Szymon Gadomski
(DPNC, University of Geneva)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
Computing for ATLAS in Switzerland has two Tier-3 sites with several years of experience, owned by Universities of Berne and Geneva. They have been used for ATLAS Monte Carlo production, centrally controlled via the NorduGrid, since 2005. The Tier-3 sites are under continuous development.
In case of Geneva the proximity of CERN leads to additional use cases, related to commissioning of...
Prof.
Gordon Watts
(UNIVERSITY OF WASHINGTON), Dr
Laurent Vacavant
(CPPM)
24/03/2009, 08:00
Event Processing
poster
The ATLAS detector, one of the two collider experiments at the Large Hadron Collider, will take high energy collision data for the first time in 2009. A general purpose detector, its physics program encompasses everything from Standard Model physics to specific searches for beyond-the-standard-model signatures. One important aspect of separating the signal from large Standard Model backgrounds...
John Chapman
(Dept. of Physics, Cavendish Lab.)
24/03/2009, 08:00
Event Processing
poster
The ATLAS digitization project is steered by a top-level PYTHON digitization package which ensures uniform and consistent configuration across the subdetectors. The properties of the digitization algorithms were tuned to reproduce the detector response seen in lab tests, test beam data and cosmic ray running. Dead channels and noise rates are read from database tables to reproduce conditions...
Simone Frosali
(Dipartimento di Fisica - Universita di Firenze)
24/03/2009, 08:00
Event Processing
poster
The CMS Silicon Strip Tracker (SST) consists of 25000 silicon microstrip sensors covering an area of 210m2 and 10 million readout channels. Starting from December 2007 the SST has been inserted and connected inside the CMS experiment and since summer 2008 it has been commissioned using cosmic muons with and without magnetic field. During these data taking the performance of the SST have been...
Dr
Gabriele Benelli
(CERN PH Dept (for the CMS collaboration))
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
The demanding computing needs of the CMS experiment require thoughtful planning and management of its computing infrastructure. A key factor in this process is the use of realistic benchmarks when assessing the computing power of the different architectures available. In recent years a discrepancy has been observed between the cpu performance estimates given by the reference benchmark for HEP...
Roberto Valerio
(Cinvestav Unidad Guadalajara)
24/03/2009, 08:00
Event Processing
poster
Decision tree learning constitutes a suitable approach to classification due to its ability to partition the input (variable) space into regions of class-uniform events, while providing a structure amenable to interpretation (as opposed to other methods such as neural networks). But an inherent limitation of decision tree learning is the progressive lessening of the statistical support of the...
Dr
Ma Xiang
(Institute of High energy Physics, Chinese Academy of Sciences)
24/03/2009, 08:00
Event Processing
poster
The BEPCII/BESIII(Beijing Electron Positron Collider / Beijing Spectrometer) had been installed and operated successfully in July 2008 and has been commissioning since Sep. 2008. The luminosity has reached 1.3*1032 cm-2s-1@489mA*530mA with 90 bunches now. About 13M psi(2S) physics data is collected by BESIII.
The offline data analysis system of BESIII have been tested and operated to handle...
Rodrigues Figueiredo Eduardo
(University Glasgow)
24/03/2009, 08:00
Event Processing
poster
The reconstruction of charged particles in the LHCb tracking
systems consists of two parts. The pattern recognition links
the signals belonging to the same particle. The track fitter
running after the pattern recognition extracts the best
parameter estimate out of the reconstructed tracks. A dedicated
Kalman-Fitter is used for this purpose. The track model
employed in the fit is based on...
Xie Yuguang
(Institute of High energy Physics, Chinese Academy of Sciences)
24/03/2009, 08:00
Event Processing
poster
The new spectrometer for the challenging physics in the tau-charm energy region, BESIII, has been constructed and gone into the commissioning phase at BEPCII, the upgraded e+e- collider with peak luminosity up to 10^33cm^-2s^-1 in Beijing, China. The BESIII muon detector will mainly contribute to the distinguishing muons from hadrons, especially the pions. The Resistive Plate Chambers(RPCs)...
Andrea Dotti
(INFN and Università Pisa)
24/03/2009, 08:00
Event Processing
poster
The challenging experimental environment and the extreme complexity of modern high-energy physics experiments make online monitoring an essential tool to assess the quality of the acquired data.
The Online Histogram Presenter (OHP) is the ATLAS tool to display histograms produced by the online monitoring system. In spite of the name, the Online Histogram Presenter is much more than just a...
Mr
Gilbert Grosdidier
(LAL/IN2P3/CNRS)
24/03/2009, 08:00
Hardware and Computing Fabrics
poster
The study and design of a very ambitious petaflop cluster exclusively dedicated to Lattice QCD simulations started in early ’08 among a consortium of 7 laboratories (IN2P3, CNRS, INRIA, CEA) and 2 SMEs. This consortium received a grant from the French ANR agency in July, and the PetaQCD project kickoff is expected to take place in January ’09. Building upon several years of fruitful...
Wouter Verkerke
(NIKHEF)
24/03/2009, 08:00
Event Processing
poster
RooFit is a library of C++ classes that facilitate data modeling in the ROOT environment. Mathematical concepts such as variables, (probability density) functions and integrals are represented as C++ objects. The package provides a flexible framework for building complex fit models through classes that mimic math operators, and is straightforward to extend. For all constructed models RooFit...
Zachary Marshall
(Caltech, USA & Columbia University, USA)
24/03/2009, 08:00
Event Processing
poster
The Simulation suite for ATLAS is in a mature phase ready to cope with the challenge of the 2009 data. The simulation framework already integrated in the ATLAS framework (Athena) offers a set of pre-configured applications for full ATLAS simulation, combined test beam setups, cosmic ray setups and old standalone test-beams. Each detector component was carefully described in all details and...
Fred Luehring
(Indiana University)
24/03/2009, 08:00
Collaborative Tools
poster
The ATLAS Experiment, with over 2000 collaborators, needs efficient and effective means of communicating information. The Collaboration has been using the TWiki Web at CERN for over three years and now has more than 7000 web pages, some of which are protected. This number greatly exceeds the number of “static” HTML pages, and in the last year, there has been a significant migration to the...
Dr
Peter Speckmayer
(CERN)
24/03/2009, 08:00
Event Processing
poster
The toolkit for multivariate analysis, TMVA, provides a large set of advanced multivariate analysis techniques for signal/background classification. In addition, TMVA now also contains regression analysis, all embedded in a framework capable of handling the pre-processing of the data and the evaluation of the output, thus allowing a simple and convenient use of multivariate techniques. The...
Mr
Andrey Lebedev
(GSI, Darmstadt / JINR, Dubna)
24/03/2009, 08:00
Event Processing
poster
The Compressed Baryonic Matter (CBM) experiment at the future FAIR accelerator at Darmstadt is being designed for a comprehensive measurement of hadron and lepton production in heavy-ion collisions from 8-45 AGeV beam energy, producing events with large track multiplicity and high hit density. The setup consists of several detectors including as tracking detectors the silicon tracking system...
Mr
Bruno Lenzi
(CEA - Saclay)
24/03/2009, 08:00
Event Processing
poster
Muons in the ATLAS detector are reconstructed by combining the information from the Inner Detectors and the Muon Spectrometer (MS), located in the outermost part of the experiment. Until they reach the MS, muons traverse typically 100 radiation lengths (X0) of material, most part instrumented by the electromagnetic and hadronic calorimeters.
The proper account for multiple scattering and...
Dr
Ingo Fröhlich
(Goethe-University)
24/03/2009, 08:00
Event Processing
poster
Due to the fact, that experimental setups are usually not suited to cover the
complete full solid angle, event generators are very important tools for
experiments. Here, theoretical calculations provide valuable input as they
can describe specific distributions for parts of the kinematic variables very
precicely. The caveat is that an event has several degrees of freedom
which can be...
Prof.
Vladimir Ivantchenko
(CERN, ESA)
24/03/2009, 08:00
Event Processing
poster
The standard electromagnetic physics packages of Geant4 are used for simulation of particle transport and HEP detector response. The requirements to the precision and stability of computations are strong, for example, calorimeter response for ATLAS and CMS should be reproduced well within 1%. To keep and control long-stand quality of the package the software suites for validation and...
Dr
Tomasz Szumlak
(Glasgow)
24/03/2009, 08:00
Event Processing
poster
The LHCb experiment is dedicated to studying CP violation and rare decays phenomena.
In order to achieve these physics goals precise tracking and vertexing around
the interaction point is crucial. This is provided by the VELO (VErtex LOcator)
silicon detector. After digitization, large FPGAs are employed to run several
algorithms to suppress noise and reconstruct clusters. This is...
Christian Helft
(LAL/IN2P3/CNRS)
24/03/2009, 08:00
Collaborative Tools
poster
IN2P3, the institute bringing together HEP laboratories in France along CEA's IRFU, opened a videoconferencing service in 2002 based on a H323 MCU. This service has steadily grown up since then, serving other French communities than the HEP one, to reach an average of about 30 different conferences a day. The relatively small amount of manpower that has been devoted to this project can be...
Mr
Joao Fernandes
(CERN)
24/03/2009, 08:00
Collaborative Tools
poster
Several recent initiatives have been put in place by the CERN IT Department to improve the user experience in remote dispersed meetings and remote collaboration at large in the LHC communities worldwide. We will present an analysis of the factors which were historically limiting the efficiency of remote dispersed meetings and describe the consequent actions which were undertaken at CERN to...
Dr
Dantong Yu
(BROOKHAVEN NATIONAL LABORATORY)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The TeraPaths, Lambda Station, and Phoebus projects were funded by the Department Of Energy's (DOE) network research program to support efficient, predictable, prioritized petascale data replication in modern high-speed networks, directly address the "last-mile" problem between local computing resources and WAN paths, and provide interfaces to modern, high performance hybrid networks with low...
Mr
Eiji Inoue
(KEK)
26/03/2009, 08:00
Online Computing
poster
We report DAQ System based on DAQ-Middleware. This system is consisting
of GUI client application and CC/NET readout programs. CC/NET is a CAMAC
crate controller module which was created by us from a joint research of
TOYO corporation and KEK. CC/NET based on pipeline processing can operate
at CAMAC specification limit speed. It has a single board computer that Linux
operating system...
Dr
Iosif Legrand
(CALTECH)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
To satisfy the demands of data intensive applications it is necessary to move to far more synergetic relationships between data transfer applications and the network infrastructure. The main objective of the High Performance Data Transfer Service we present is to effectively use the available network infrastructure capacity and to coordinate, manage and control large data transfer tasks...
Dr
Jingyan Shi
(IHEP)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The operation of the BESIII experiment started on July, 2008. More than 5 PB data will be produced in the coming 5 years. To increase the efficiency of data analysis and simulation, it is necessary sometimes for the physicists to cut a long job into a certain number of small jobs and execute in a distributed mode. A tool is developed for the BESIII job submission and management. With the tool,...
Dr
Wenji Wu
(Fermi National Accelerator Laboratory)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Distributed petascale computing involves analysis of massive data sets in a large-scale cluster computing environment. Its major concern is to efficiently and rapidly move the data sets to the computation and send results back to users or storage. However, the needed efficiency of data movement has hardly been achieved in practice. Present cluster operating systems usually are general-purpose...
Dr
Gabriele Compostella
(CNAF INFN), Dr
Manoj Kumar Jha
(INFN Bologna)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Being a large international collaboration established well before the
full development of the Grid as the main computing tool for High
Energy Physics, CDF has recently changed and improved its computing model, decentralizing some parts of it in order to be able to exploit the rising number of distributed resources available nowadays.
Despite those efforts, while the large majority of CDF...
Stefano Bagnasco
(INFN Torino)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Current Grid deployments for LHC computing (namely the WLCG infrastructure) do not allow efficient parallel interactive processing of data. In order to allow physicists to interactively access subsets of data (e.g. for algorithm tuning and debugging before running over a full dataset) parallel Analysis Facilities based on PROOF have been deployed by the ALICE experiment at CERN and elsewhere....
Mr
Roland Moser
(CERN and Technical University of Vienna)
26/03/2009, 08:00
Online Computing
poster
The CMS Data Acquisition System consists of O(1000) of interdependent services. A monitoring system providing exception and application-specific data is essential for the operation of this cluster.
Due to the number of involved services the amount of monitoring data is higher than a human operator can handle efficiently. Thus moving the expert-knowledge for error analysis from the operator to...
Mr
Mario Lassnig
(CERN & University of Innsbruck)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Unrestricted user behaviour is becoming one of the most critical properties in data intensive supercomputing. While policies can help to maintain a usable environment in clearly directed cases, it is important to know how users interact with the system so that it can be adapted dynamically, automatically and timely.
We present a statistical and generative model that can replicate and simulate...
Dr
Andrew Stephen McGough
(Imperial College London)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The Grid as an environment for large-scale job execution is now moving beyond the prototyping phase to real deployments on national and international scales providing real computational cycles to application scientists. As the Grid move into production, characteristics about how users are exploiting the resources and how the resources are coping with production load are essential in...
Dr
Vivian ODell
(FNAL)
26/03/2009, 08:00
Online Computing
poster
The CMS event builder assembles events accepted by the first level trigger
and makes them available to the high-level trigger. The system needs to handle a maximum input rate of 100 kHz and an aggregated
throughput of 100 GBytes/s originating from approximately 500 sources. This
paper presents the chosen hardware and software architecture. The system consists of 2 stages: an initial...
Dr
Wainer Vandelli
(Conseil Europeen Recherche Nucl. (CERN))
26/03/2009, 08:00
Online Computing
poster
The ATLAS DataFlow infrastructure is responsible for the collection and conveyance of event data from the detector front-end electronics to the mass storage. Several optimized and multi-threaded applications fulfill this purpose operating over a multi-stage Gigabit Ethernet network which is the backbone of the ATLAS Trigger and Data Acquisition System. The system must be able to efficiently...
Raquel Pezoa Rivera
(Univ. Tecnica Federico Santa Maria (UTFSM))
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The ATLAS Distributed Computing system provides a set of tools and libraries enabling data movement, processing and analysis on a grid environment. While reaching a state of maturity high enough for real data taking, it became clear that one component was missing exposing consistent information regarding site topology, service and resource information from all three distinct ATLAS grids (EGEE,...
Denis Oliveira Damazio
(Brookhaven National Laboratory)
26/03/2009, 08:00
Online Computing
poster
The ATLAS detector is undergoing intense commissioning effort with
cosmic rays preparing for the first LHC colisions next spring. Combined
runs with all of the ATLAS subsystems are being taken in order to evaluate
the detector performance. This is an unique opportunity also for the trigger
system to be studied with different detector operation modes, such as
different event rates and...
Dr
Luca Fiorini
(IFAE Barcelona)
26/03/2009, 08:00
Online Computing
poster
TileCal is the barrel hadronic calorimeter of the ATLAS experiment presently in an advanced state of commissioning with cosmic and single beam data at the LHC accelerator.
The complexity of the experiment, the number of electronics channels and the high rate of acquired events requires a systematic strategy of the System Preparation for the Data Taking.
This is done through a precise...
Mr
Costin Grigoras
(CERN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
A complex software environment such as the ALICE Computing Grid infrastructure requires permanent control and management for the large set of services involved. Automating control procedures reduces the human interaction with the various components of the system and yields better availability of the overall system. In this paper we will present how we used the MonALISA framework to gather,...
Hongyu ZHANG
(Experimental Physics Center, Experimental Physics Center, Chinese Academy of Sciences, Beijing, China)
26/03/2009, 08:00
Online Computing
poster
BEPCII is designed with a peak luminosity of 1033cm-2sec-1. After the Level 1 trigger, the event rate is estimated to be around 4000Hz at J/ψ peak. A pipelined front-end electronic system is designed and developed and the BESIII DAQ system is accomplished to satisfy the requirement of event readout and processing with such a high event rate.
BESIII DAQ system consists of about 100 high...
Riccardo Zappi
(INFN-CNAF)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
In the storage model adopted by WLCG, the quality of service for a storage capacity provided by an SRM-based service is described by the concept of Storage Class. In this context, two parameters are relevant: the Retention Policy and the Access Latency. With the advent of cloud-based resources, virtualized storage capabilities are available like the Amazon Simple Storage Service (Amazon S3)....
Dr
Daniele Bonacorsi
(CMS experiment / INFN-CNAF, Bologna, Italy)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
During February and May 2008, CMS participated to the Combined Computing Readiness Challenge (CCRC'08) together with all other LHC experiments. The purpose of this world-wide exercise was to check the readiness of the computing infrastructure for LHC data taking. Another set of major CMS tests called Computing, Software and Analysis challenge (CSA'08) - as well as CMS cosmic runs - were also...
Dr
Timm Steinbeck
(Institute of Physics)
26/03/2009, 08:00
Online Computing
poster
For the ALICE heavy-ion experiment a large cluster will be used to
perform the last triggering stages in the High Level Trigger. For the
first year of operation the cluster consists of about 100 SMP nodes
with 4 or 8 CPU cores each, to be increased to more than 1000 nodes
for the later years of operation. During the commissioning phases of
the detector, the preparations for first LHC...
Claudia Ciocca
(INFN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
In the framework of WLCG, Tier1s need to manage large manage volumes of data ranging in
the PB scale. Moreover they need to be able to transfer data, from CERN and with the
other centres (both Tier1s and Tier2s) with a sustained throughput of the order of
hundreds of MB/s over the WAN offering at the same time a fast and reliable access also
to the computing farm.
In order to cope with...
Dr
Volker Friese
(GSI Darmstadt)
26/03/2009, 08:00
Online Computing
poster
The Compressed Baryonic Matter experiment (CBM) is one of the core experiments to be operated at the future FAIR accelerator complex in Darmstadt, Germany, from 2014 on. It will investigate heavy-ion collisions at moderate beam energies but extreme interaction rates, which give access to extremely rare probes such as open charm or charmonium decays near the production threshold.
The high...
Daniel Charles Bradley
(High Energy Physics)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
A number of recent enhancements to the Condor batch system have been stimulated by the challenges of LHC computing. The result is a more robust, scalable, and flexible computing platform. One product of this effort is the Condor JobRouter, which serves as a high-throughput scheduler for feeding multiple (e.g. grid) queues from a single input job queue. We describe its principles and how it...
Vardan Gyurjyan
(JEFFERSON LAB)
26/03/2009, 08:00
Online Computing
poster
The ever growing heterogeneity of physics experiment control systems presents a real challenge to uniformly describe control system components and their operational details. Control Oriented Ontology Language (COOL) is an experiment control meta-data modeling language that provides a generic means for concise and uniform representation of physics experiment control processes and components,...
Xavier Mol
(Forschungszentrum Karlsruhe)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
D-Grid is the German initiative for building a national computing grid. When its customers want to work within the German grid, they need dedicated software, called ‘middleware’. As D-Grid site administrators are free to choose their middleware according to the needs of their users, the project ‘DGI (D-Grid Integration) reference installation’ was launched. Its purpose is to assist the site...
Mr
Antonio Delgado Peris
(CIEMAT)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Grid infrastructures constitute nowadays the core of the computing facilities of the biggest LHC experiments. These experiments produce and manage petabytes of data per year and run thousands of computing jobs every day to process that data. It is the duty of metaschedulers to allocate the tasks to the most appropriate resources at the proper time.
Our work reviews the policies that have...
Peter Onyisi
(University of Chicago)
26/03/2009, 08:00
Online Computing
poster
At the ATLAS experiment, the Detector Control System (DCS) is used to
oversee detector conditions and supervise the running of equipment.
It is essential that information from the DCS about the status of
individual sub-detectors be extracted and taken into account when
determining the quality of data taken and its suitability for different
analyses.
DCS information is written online to...
Mr
Yuriy Ilchenko
(SMU)
26/03/2009, 08:00
Online Computing
poster
The start of collisions at the LHC brings with it much excitement and many unknowns. It’s essential at this point in the experiment to be prepared with user-friendly tools to quickly and efficiently determine the quality of the data. Easy visualization of data for the shift crew and experts is one of the key factors in the data quality assessment process.
The Data Quality Monitoring...
Dr
Hiroyuki Matsunaga
(ICEPP, University of Tokyo)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
A Tier-2 regional center is running at the University of Tokyo in Japan.
This center receives a large amount of data of the ATLAS experiment
from the Tier-1 center in France. Although the link between the two centers
has 10Gbps bandwidth, it is not a dedicated link but is shared with
other traffic, and the round trip time is 280msec. It is not easy
to exploit the available bandwidth...
Mr
Vladlen Timciuc
(California Institute of Technology)
26/03/2009, 08:00
Online Computing
poster
The CMS detector at LHC is equipped with a high precision electromagnetic crystal calorimeter (ECAL). The crystals experience a transparency change when exposed to radiation during LHC operation, which recovers in absents of irradiation on the time scale of hours. This change of the crystal response is monitored with a laser system which performs a transparency measurement of each crystal of...
Dr
Silke Halstenberg
(Karlsruhe Institute of Technology)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The dCache installation at GridKa, the German Tier-1 center, is ready for LHC data taking. After years of tuning and dry runs, several software and operational bottlenecks have been identified.
This contribution describes several procedures to improve stability and reliability of the Tier-1 storage setup. These range from redundant hardware and disaster planning over fine grained monitoring...
Mr
Tigran Mkrtchyan Mkrtchyan
(Deutsches Elektronen-Synchrotron DESY)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Starting spring 2009, all WLCG data management services have to be ready and prepared to move terabytes of data from CERN to the Tier 1 centers world wide, and from the Tier 1s to their corresponding Tier 2s. Reliable file transfer services, like FTS, on top of the SRM v2.2 protocol are playing a major role in this game. Nevertheless, moving large junks of data is only part of the challenge....
Dr
Paul Millar
(DESY)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
In the gLite grid model a site will typically have a Storage Element (SE) that has no direct mechanism for updating any central or experiment-specific catalogues. This loose coupling was a deliberate decision that simplifies SE design; however, a consequence of this is that the catalogues may provide an incorrect view of what is stored on a SE.
In this paper, we present work to allow...
Dr
James Letts
(Department of Physics-Univ. of California at San Diego (UCSD))
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The CMS experiment at CERN is preparing for LHC data taking in several computing preparation activities. In early 2007 a traffic load generator infrastructure for distributed data transfer tests was designed and deployed to equip the WLCG Tiers which support the CMS Virtual Organization with a means for debugging, load-testing and commissioning data transfer routes among CMS Computing Centres....
Dr
Sergio Andreozzi
(INFN-CNAF)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The GLUE 2.0 specification is an upcoming OGF specification for standard-based Grid resource characterization to support functionalities such as discovery, selection and monitoring.
An XML Schema realization of GLUE 2.0 is available, nevertheless, Grids still lack a standard information service interface. Therefore, there is no uniform agreed solution to expose resource descriptions.
On...
Dr
Vincenzo Spinoso
(INFN, Bari)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Together with the start of LHC, high-energy physics researchers will start massive usage of LHC Tier2s. It is essential to supply physics user groups with a simple and intuitive “user-level” summary of their associated T2 services’ status, showing for example available, busy and unavailable resources. At the same time, site administrators need “technical level” monitoring, namely a view of...
Gabriel Caillat
(LAL, Univ. Paris Sud, IN2P3/CNRS)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Desktop grids, such as XtremWeb and BOINC, and service grids, such as EGEE, are two different approaches for science communities to gather computing power from a large number of computing resources. Nevertheless, little work has been done to combine these two Grid technologies in order to establish a seamless and vast grid resource pool. In this paper we present the EGEE service grid, the...
Mr
Michal ZEROLA
(Nuclear Physics Inst., Academy of Sciences)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
For the past decade, HENP experiments have been heading towards a distributed computing model in an effort to concurrently process tasks over enormous data sets that have been increasing in size as a function of time. In order to optimize all available resources (geographically spread) and minimize the processing time, it is necessary to face also the question of efficient data transfers and...
Dr
Simone Campana
(CERN/IT/GS)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The ATLAS Experiment at CERN developed an automated system for data distribution of simulated and detector data. Such system, which partially consists of various ATLAS specific services, strongly relies on the WLCG service infrastructure, both at the level of middleware components, service deployment and operations. Because of the complexity of the system and its highly distributed nature, a...
Julia Andreeva
(CERN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
One of the most important conclusion of the analysis of the results of
CCRC08 and operational experience after CCRC08 is that the LHC experiment
specific monitoring systems are the main sources of the monitoring
information. They are widely used by people taking computing shifts. They
are the first ones to detect the problems of various nature.
Though these systems provide rather...
Dr
Chadwick Keith
(Fermilab)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Fermilab supports a scientific program that includes experiments and scientists located across the globe. To better serve this community, Fermilab has placed its production computer resources in a Campus Grid infrastructure called 'FermiGrid'. The architecture of FermiGrid facilitates seamless interoperation of the multiple heterogeneous Fermilab resources with the resources of the other...
Pablo Saiz
(CERN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The LHC experiments are going to start collecting data during the spring of 2009. The number of people and centers involved in such experiments sets a new record in the physics community. For instance, in CMS there are more than 3600 physicists, and more than 60 centers distributed all over the world.
Managing such a big number of distributed sites and services is not a trivial task....
Dr
Armin Scheurer
(Karlsruhe Institute of Technology)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The CMS computing model anticipates various hierarchically linked tier centres to counter the challenges provided by the enormous amounts of data which will be collected by the CMS detector at the Large Hadron Collider, LHC, at CERN. During the past years, various computing exercises were performed to test the readiness of the computing infrastructure, the Grid middleware and the experiment's...
Mr
Philippe Canal
(Fermilab)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The Open Science Grid's usage accounting solution is a system known as, "Gratia." Now that it has been deployed successfully the Open Science Grid's next accounting challenge is to correctly interpret and make the best possible use of the information collected. One such issue is, "Did we use and/or get credit for, the resource we think we used?" Another example is the problem of ensuring that...
Mr
David Collados Polidura
(CERN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The Worldwide LHC Computing Grid (WLCG) is based on a four-tiered model that comprises collaborating resources from different grid infrastructures such as EGEE and OSG. While grid middleware provides core services on variety of platforms, monitoring tools like Gridview, SAM, Dashboards and GStat are being used for monitoring, visualization and evaluation of the WLCG infrastructure.
The...
Andrew McNab
(Unknown)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
We present an overview of the current status of the GridSite toolkit, describing the new security model for interactive and programmatic uses introduced in the last year. We discuss our experiences of implementing these internal changes and how they have been promoted by requirements from users and wider security trends in Grids (such as CSRF). Finally, we explain how these have improved the...
Mr
Laurence Field
(CERN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Authors: Laurence Field, Felix Ehm, Joanna Huang, Min Tsai
Grid Information Systems are mission-critical components in todays production grid infrastructures. They enable users, applications and services to discover
which services exists in the infrastructure and further information about the service structure and state.
It is therefore important that the information system components...
Dantong Yu
(BNL)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Modern nuclear and high energy experiments yield large amounts of data and thus require efficient and high capacity storage and transfer. BNL, the hosting site for RHIC experiments and the US center for LHC ATLAS, plays a pivotal role in transferring to and from other sites in the US and around the world in a tiered fashion for data distribution and processing. Each component in the...
Gyoergy Vesztergombi
(Res. Inst. Particle & Nucl. Phys. - Hungarian Academy of Science)
26/03/2009, 08:00
Online Computing
poster
Unusually high intensity ( 10**11 proton/sec ) beam is planned to be ejected for fixed targets at FAIR accelerator upto 90 GeV energy. Using this beam the FAIR-CBM experiment provides an unique high luminosity facility to measure high pT phenomena with unprecedented sensitivity exceeding by orders of magnitude that of previous experiments.
Applying 1% target the expected minimum bias event...
Dr
Christopher Jung
(Forschungszentrum Karlsruhe)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Most Tier-1 centers of LHC Computing Grid are using dCache as their storage system. dCache uses a cost model incorporating CPU and space costs for the distribution of data on its disk pools.
Storage resources at Tier-1 centers are usually upgraded once or twice a year according to given milestones. One of the effects of this procedure is the accumulation of heterogeneous hardware resources....
Timur Perelmutov
(FERMI NATIONAL ACCELERATOR LABORATORY)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The dCache disk caching file system has been chosen by a majority of LHC Experiments' Tier 1 centers for their data storage needs. It is also deployed at many Tier 2 centers. In preparation for the LHC startup, very large installations of dCache - up to 3 Petabytes of disk - have already been deployed, and the systems have operated at transfer rates exceeding 2000 MB/s over the WAN. As the LHC...
Ms
Giulia Taurelli
(CERN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
HSM systems such as the CERN’s Advanced STORage manager (CASTOR) [1] are responsible for storing Petabytes of data which is first cached on disk and then persistently stored on tape media.
The contents of these tapes are regularly repacked from older, lower-density media to new-generation, higher-density media in order to free up physical space and ensure long term data integrity and...
Mr
laurence field
(cern)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Author: Laurence Field, Markus Schulz, Felix Ehm, Tim Dyce
Grid Information Systems are mission-critical components in todays production grid infrastructures. They enable users, applications and services to discover which services exists in the infrastructure and further information about the service structure and state.
As the Grid Information System is pervasive throughout the...
Dr
Tony Wildish
(PRINCETON)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
PhEDEx, the CMS data- placement system, uses the FTS service to transfer files. Towards the end of 2007 PhEDEx was beginning to show some serious scaling issues, with excessive numbers of processes on the site VOBOX running PhEDEx, poor efficiency in use of FTS job-slots, high latency for failure-retries, and other problems. The core PhEDEx architecture was changed in May 2008 to eliminate...
Dr
Sergey Linev
(GSI Darmstadt)
26/03/2009, 08:00
Online Computing
poster
New experiments at FAIR like CBM require new concepts of data acquisition systems, where instead of central trigger self-triggered electronics with time-stamped readout should be used. A first prototype of such a system was implemented in form of a CBM readout controller (ROC) board, which is designed to read time-stamped data from a front-end board equipped with nXYTER chips and transfer that...
Daniel Bradley
(University of Wisconsin)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Physicists have access to thousands of CPUs in grid federations such as OSG and EGEE. With the start-up of the LHC, it is essential for individuals or groups of users to wrap together available resources from multiple sites across multiple grids under a higher user-controlled layer in order to provide a homogeneous pool of available resources. One such system is glideinWMS, which is based on...
Sergey Kalinin
(Universite Catholique de Louvain)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
As the Large Hadron Collider (LHC) at CERN, Geneva, has begun operation in
September, the large scale computing grid LCG (LHC Computing Grid) is meant
to process and store the large amount of data created in simulating,
measuring and analyzing of particle physic experimental data. Data acquired
by ATLAS, one of the four big experiments at the LHC, are analyzed using
compute jobs running...
Lev Shamardin
(Scobeltsyn Institute of Nuclear Physics, Moscow State University (SINP MSU))
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Grid systems are used for calculations and data processing in various applied
areas such as biomedicine, nanotechnology and materials science, cosmophysics
and high energy physics as well as in a number of industrial and commercial
areas. Traditional method of execution of jobs in grid is running jobs directly
on the cluster nodes. This limits the choice of the operational environment...
Somogyi Peter
(Technical University of Budapest)
26/03/2009, 08:00
Online Computing
poster
LHCb is one of the four major experiments under completion at the Large Hadron Collider (LHC). Monitoring the quality of the acquired data is important, because it allows the verification of the detector performance. Anomalies, such as missing values or unexpected distributions can be indicators of a malfunctioning detector, resulting in poor data quality.
Spotting faulty components can be...
Dr
Andrea Chierici
(INFN-CNAF)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Quattor is a system administration toolkit providing a powerful, portable, and modular set of tools for the automated installation, configuration, and management of clusters and farms. It is developed as a community effort and provided as open-source software. Today, quattor is being used to manage at least 10 separate infrastructures spread across Europe. These range from massive single-site...
Mr
Adolfo Vazquez
(Universidad Complutense de Madrid)
26/03/2009, 08:00
Distributed Processing and Analysis
poster
The MAGIC telescope, a 17-meterCherenkov telescope located on La Palma (Canary Islands), is dedicated to the study of the universe in Very High Energy gamma-rays. These particles arrive at the Earth's atmosphere producing atmospheric showers of secondary particles that can be detected on ground through their Cherenkov radiation. MAGIC relies on a large number of Monte Carlo simulations for the...
Jeremiah Jet Goodson
(Department of Physics - State University of New York (SUNY))
26/03/2009, 08:00
Online Computing
poster
The ATLAS detector at the Large Hadron Collider is expected to collect an unprecedented wealth of new data at a completely new energy scale. In particular its Liquid Argon electromagnetic and hadronic calorimeters will play an essential role in measuring final states with electrons and photons and in contributing to the measurement of jets and missing transverse energy. Efficient monitoring...
Luciano Orsini
(CERN)
26/03/2009, 08:00
Online Computing
poster
The CMS data acquisition system comprises of O(10000) of interdependent services that need to be
monitored in near real-time. The ability to monitor a large number of distributed applications
accurately and effectively is of paramount importance for operation.
Application monitoring entails the collection of a large number of simple and composed values
made available by the software...
Dr
Raja Nandakumar
(Rutherford Appleton Laboratory)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
DIRAC, the LHCb community Grid solution, is intended to reliably run large data mining activities. The DIRAC system consists of various services (which wait to be contacted to perform actions) and agents (which carry out periodic activities) to direct jobs as required. An important part of ensuring the reliability of the infrastructure is the monitoring and logging of these DIRAC distributed...
Mr
Daniel Filipe Rocha Da Cunha Rodrigues
(CERN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The MSG (Messaging System for the Grid) is a set of tools that make a Message Oriented platform available for communication between grid monitoring components. It has been designed specifically to work with the EGEE operational tools and acts as an integration platform to improve the reliability and scalability of the existing operational services. MSG is a core component as WLCG monitoring...
Mr
Andrey Bobyshev
(FERMILAB)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
There are a number of active projects to design and develop a data control plane capability that steers traffic onto alternate network paths, instead of the default path provided though standard IP connectivity. Lambda Station, developed by Fermilab and Caltech, is one example of such solution, and is currently deployed at US CMS Tier1 facility at Fermilab and various Tier2 sites.
When the...
Vakhtang Tsiskaridze
(Tbilisi State University, Georgia)
26/03/2009, 08:00
Online Computing
poster
At this moment, at 100 KHz frequency, in the Tile Calorimeter ROD DSP using Optimal Filtering Reconstruction method Amplitude, Time and Quality Factor (QF) parameters are calculated. If QF is good enough only Amplitude, Time and QF are stored, otherwise the data quality is considered bad and it is proposed to store raw data for further studies. Without any compression, bandwidth limitation...
Daniele Cesini
(INFN CNAF)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The Workload Management System is the gLite service supporting the distributed production and analysis activities of various HEP experiments. It is responsible of dispatching computing jobs to remote computing facilities by matching job requirements and the resource status information collected from the Grid information services. Given the distributed and heterogeneous nature of the Grid, the...
Chendong FU
(IHEP, Beijing)
26/03/2009, 08:00
Online Computing
poster
BEPCII is the electron-positron collider with the highest
luminosity at tau-charm energy region and BESIII is the corresponding
detector with greatly improve detection capacity. For the accelerator and
detector, the event tigger is rathe high. In order to reduce the background
level and the recorder burden of computers, the online event filtering
algorithm is established. Such an...
Dr
Greig Cowan
(University of Edinburgh)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The ScotGrid distributed Tier-2 now provides more that 4MSI2K and 500TB for LHC computing, which is spread across three sites at Durham, Edinburgh and Glasgow.
Tier-2 sites have a dual role to play in the computing models of the LHC VOs. Firstly, their CPU resources are used for the generation of Monte Carlo event data. Secondly, the end user analysis object data is distributed to the site...
Dr
Silvio Pardi
(INFN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The quality of the connectivity provided by the network infrastructure of a Grid is
a crucial factor to guarantee the accessibility of Grid services, schedulate effciently processing and data transfer activity on the Grid and meet QoS expectations. Yet most Grid application do not take into consideration the expected performance of the network resources they plan to use. In this paper we...
Dr
Jose Antonio Coarasa Perez
(Department of Physics - Univ. of California at San Diego (UCSD))
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The Open Science Grid middleware stack has seen intensive development over the past years and has become more and more mature, as increasing numbers of sites have been successfully added to the infrastructure. Considerable effort has been put into consolidating this infrastructure and enabling it to provide a high degree of scalability, reliability and usability. A thorough evaluation of its...
Dr
Max Böhm
(EDS / CERN openlab)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
GridMap (http://gridmap.cern.ch) has been introduced to the community at the EGEE'07 conference as a new monitoring tool that provides better visualization and insight to the state of the Grid than previous tools. Since then it has become quite popular in the grid community. Its 2 dimensional graphical visualization technique based on treemaps, coupled with a simple responsive AJAX based rich...
Dr
Maxim Potekhin
(BROOKHAVEN NATIONAL LABORATORY)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The Panda Workload Management System is designed around the concept of the Pilot Job - a "smart wrapper" for the payload executable, that can probe the
environment on the remote worker node before pulling down the payload
from the server and executing it. Such design allows for improved logging
and monitoring capabilities as well as flexibility in Workload Management.
In the Grid...
Dr
Ricardo Graciani Diaz
(Universitat de Barcelona)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
DIRAC, the LHCb community Grid solution, has pioneered the use of pilot jobs in the Grid. Pilot jobs provide a homogeneous interface to an heterogeneous set of computing resources. At the same time, pilot jobs allow to delay the scheduling decision to the last moment, thus taking into account the precise running conditions at the resource and last moment requests to the system.
The DIRAC...
Dr
Marie-Christine Sawley
(ETHZ)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Resource tracking, like usage monitoring, relies on fine granularity information communicated by each site on the Grid. Data is later aggregated to be analysed under different perspectives to yield global figures which will be used for decision making. The dynamic information collected from distributed sites must therefore be comprehensive, pertinent and coherent with up stream (planning) and...
Mr
Antonio Ceseracciu
(SLAC)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The Network Engineering team at the SLAC National Accelerator Laboratory is required to manage an increasing number and variety of network devices with a fixed amount of human resources. At the same time, networking equipment has acquired more intelligence to gain introspection and visibility onto the network.
Making such information readily available for network engineers and user support...
Mr
Andrey Bobyshev
(FERMILAB)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Emerging dynamic circuit services are being developed and deployed to facilitate high impact data movement within the research and education communities. These services normally require network awareness in the applications, in order to establish an end-to-end path on-demand programmatically. This approach has significant difficulties because user applications need to be modified to support...
Mr
Parag Mhashilkar
(Fermi National Accelerator Laboratory)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The Open Science Grid (OSG) offers access to hundreds of Compute elements (CE) and storage elements (SE) via standard Grid interfaces. The Resource Selection Service (ReSS) is a push-based workload management system that is integrated with the OSG information systems and resources. ReSS integrates standard Grid tools such as Condor, as a brokering service and the gLite CEMon, for gathering and...
Mr
Volker Buege
(Inst. fuer Experimentelle Kernphysik - Universitaet Karlsruhe)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
An efficient administration of computing centres requires sophisticated tools for the monitoring of the local infrastructure. Sharing such resources in a grid infrastructure, like the Worldwide LHC Computing Grid (WLCG), goes ahead with a large number of external monitoring systems, offering information on the status of the services of a grid site. This huge flood of information from many...
Dr
Bohumil Franek
(Rutherford Appleton Laboratory)
26/03/2009, 08:00
Online Computing
poster
In the SMI++ framework, the real world is viewed as a collection of objects
behaving as finite state machines. These objects can represent real entities,
such as hardware devices or software tasks, or they can represent abstract
subsystems. A special language (SML) is provided for the object description.
The SML description is then interpreted by a Logic Engine (coded in C++)
to drive the...
Mr
Ales Krenek
(CESNET, CZECH REPUBLIC), Mr
Jiri Sitera
(CESNET, CZECH REPUBLIC), Mr
Ludek Matyska
(CESNET, CZECH REPUBLIC), Mr
Miroslav Ruda
(CESNET, CZECH REPUBLIC), Mr
Zdenek Sustr
(CESNET, CZECH REPUBLIC)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Logging and Bookkeeping (L&B) is a gLite subsystem responsible for
tracking jobs on the grid. Normally the user interacts with it via
glite-wms-job-status and glite-wms-job-logging-info commands.
Here we present other, less generally known but still useful L&B usage
patterns which are available with recently developed L&B features.
L&B exposes a HTML interface; pointing a web browser...
Dr
Jens Jensen
(STFC-RAL)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
We show how to achieve interoperation between SDSC's Storage Resource Broker (SRB) and the Storage Resource Manager (SRM) implementations used in the Large Hadron Collider Computing Grid. Interoperation is achieved using gLite tools, to demonstrate file transfers between two different grids.
This presentation is different from the work demonstrated by the authors and collaborators at SC2007...
Dr
Andreas Gellrich
(DESY)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
DESY is one of the world-wide leading centers for research with particle
accelerators and synchrotron light. In HEP DESY participates in LHC as a
Tier-2 center, supports on-going analyzes of HERA data, is a leading
partner for ILC, and runs the National Analysis Facility (NAF) for LHC and
ILC. For the research with synchrotron light major new facilities are
operated and built (FLASH,...
Mr
Alexander Zaytsev
(Budker Institute of Nuclear Physics (BINP))
26/03/2009, 08:00
Online Computing
poster
This contribution gives a thorough overview of the ATLAS TDAQ SysAdmin group activities which deals with administration of the TDAQ computing environment supporting High Level Trigger, Event Filter and other subsystems of the ATLAS detector operating at the LHC machine at CERN. The current installation consists of approximately 1500 netbooted nodes managed by more than 60 dedicated servers,...
Vasco Chibante Barroso
(CERN)
26/03/2009, 08:00
Online Computing
poster
All major experiments need tools that provide a way to keep a record of the events and activities, both during commissioning and operations. In ALICE (A Large Ion Collider Experiment) at CERN, this task is performed by the Alice Electronic Logbook (eLogbook), a custom-made application developed and maintained by the Data-Acquisition group (DAQ). Started as a statistics repository, the eLogbook...
Pablo Saiz
(CERN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Once the ALICE experiments starts collecting data, it will gather up to 4 PB of information per year. The data will be analyzed in centers distributed all over the world. Each of these centers might have a different software environment. To be able to use all these resources in a similar way, ALICE has developed AliEn, a GRID layer that provides the same interface independently of the...
Christian Ohm
(Department of Physics, Stockholm University)
26/03/2009, 08:00
Online Computing
poster
The ATLAS BPTX stations are comprised of electrostatic button pick-up detectors, located 175 m away along the beam pipe on both sides of ATLAS. The pick-ups are installed as a part of the LHC beam instrumentation and used by ATLAS for timing purposes.
The usage of the BPTX signals in ATLAS is twofold; they are used both in the trigger system and for LHC beam monitoring. The ATLAS Trigger...
Ricardo Rocha
(CERN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The ATLAS Distributed Data Management (DDM) system is now at the point of focusing almost all its efforts to operations after successfully delivering a high quality product which has proved to scale to the extreme requirements of the experiment users.
The monitoring effort has followed the same path and is now focusing mostly on the shifters and experts operating the system. In this paper we...
Alessandro De Salvo
(Istituto Nazionale di Fisica Nucleare Sezione di Roma 1)
26/03/2009, 08:00
Online Computing
poster
The calibration of the ATLAS MDT chambers will be performed at remote sites,
called Remote Calibration Centers. Each center will process the calibration
data for the assigned part of the detector and send the results back to CERN
for general use in the reconstruction and analysis within 24h from the
calibration data taking.
In this work we present the data extraction mechanism, the data...
Remigius K Mommsen
(FNAL, Chicago, Illinois, USA)
26/03/2009, 08:00
Online Computing
poster
The CMS event builder assembles events accepted by the first level trigger
and makes them available to the high-level trigger. The event builder needs
to handle a maximum input rate of 100 kHz and an aggregated throughput of
100 GBytes/s originating from approximately 500 sources. This paper presents
the chosen hardware and software architecture. The system consists of 2
stages: an...
Dr
Jose Flix Molina
(Port d'Informació Científica, PIC (CIEMAT - IFAE - UAB), Bellaterra, Spain)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The computing system of the CMS experiment works using distributed resources from more than 60 computing centres worldwide. These centres, located in Europe, America and Asia are interconnected by the Worldwide LHC Computing Grid. The operation of the system requires a stable and reliable behaviour of the underlying infrastructure. CMS has established a procedure to extensively test all...
Mr
Yuriy Ilchenko
(SMU)
26/03/2009, 08:00
Online Computing
poster
The ATLAS experiment's data acquisition system is distributed across the nodes
of large farms. Online monitoring and data quality runs alongside this
system. A mechanism is required that integrates the monitoring data from
different nodes and makes it available for shift crews. This integration includes but is
not limited to summation or averaging of histograms and summation of trigger...
Dr
Marco Cecchi
(INFN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The gLite Workload Management System (WMS) has been designed and developed to represent a reliable and efficient entry point to high-end services available on a Grid. The WMS translates user requirements and preferences into specific operations and decisions - dictated by the general status of all other Grid services it interoperates with - while taking responsibility to bring requests to...
Dr
Alessandro Di Girolamo
(CERN)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
This contribution describes how part of the monitoring of the services used in the computing systems of the LHC experiments has been integrated with the Service Level Status (SLS) framework.
The LHC experiments are using an increasingly number of complex and heterogeneous services:
the SLS allows to group all these different services and to report their status and their availability by...
Dr
Doris Ressmann
(Karlsruher Institut of Technology)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
All four LHC experiments are served by GridKa, the German WLCG Tier-1 at the Steinbuch Centre for Computing of the Karlsruhe Institute of Technology (KIT). Each of the experiments requires a significantly different setup of the dCache data management system. Therefore the use of a single dCache instance for all experiments can have negative effects at different levels, e.g. SRM, space manager...
Mr
Fernando Guimaraes Ferreira
(Univ. Federal do Rio de Janeiro (UFRJ))
26/03/2009, 08:00
Online Computing
poster
The web system described here provides functionalities to monitor the Detector Control System (DCS) acquired data. The DCS is responsible for overseeing the coherent and safe operation of the ATLAS experiment hardware. In the context of the Hadronic Tile Calorimeter Detector, it controls the power supplies of the readout electronics acquiring voltages, currents, temperatures and coolant...
211.
Tools for offline access and visualization of ATLAS online control and data quality databases .
Mr
Lourenço Vaz
(LIP - Coimbra)
26/03/2009, 08:00
Online Computing
poster
Data describing the conditions of the ATLAS detector and the Trigger and Data Acquisition system are stored in the Conditions DataBases (CDB), and may include from simple values to complex objects like online system messages or monitoring histograms. The CDB are deployed on COOL, a common infrastructure for reading and writing conditions data. Conditions data produced online are saved to an...
Dr
Josva Kleist
(Nordic Data Grid Facility)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
Interoperability of grid infrastructures is becoming increasingly important in the emergence of large scale grid infrastructures based on national and regional initiatives.
To achieve interoperability of grid infrastructures adaptions and bridging of many different systems and services needs to be tackled. A grid infrastructure offers services for authentication, authorization, accounting,...
Prof.
Jorge Rodiguez
(Florida International University), Dr
Yujun Wu
(University of Florida)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The CMS experiment is expected to produce a few Peta Bytes of data a
year and distribute them globally. Within the CMS computing infrastructure,
most user analyses and the production of the Monte Carlo events will be
carried out at some 50 CMS Tier-2 sites. The way how to store the data and to
allow physicists to access them efficiently has been a challenge, especially
for Tier-2...
Torsten Antoni
(GGUS, KIT-SCC)
26/03/2009, 08:00
Grid Middleware and Networking Technologies
poster
The user and operations support of the EGEE series of projects can be captioned "regional support with central coordination". Its central building block is the GGUS portal which acts as an entry point for users and support staff. It is also as an integration platform for the distributed support effort. As WLCG relies heavily on the EGEE infrastructure it is important that the support...
