Speakers
Dr
Armando Fella
(INFN Pisa)Mr
Domenico Diacono
(INFN Bari)Dr
Giacinto Donvito
(INFN-Bari)Mr
Giovanni Marzulli
(GARR)
Paolo Franchini
(Universita e INFN (IT))Dr
Silvio Pardi
(INFN)
Description
In HEP computing context, R&D studies aiming to the definition of the data and workload models were brought forward by the SuperB community beyond the experiment life itself. This work is considered of great interest for a generic mid- and small size VO during its Computing Model definition phase.
Data-model R&D work we are presenting, starts with the general design
description of the crucial components in terms of typical HEP use cases;
a discussion on strategies and motivations for the taken choices in the
fields of data access, mass data transfer and meta-data catalog system
is provided firstly. In such a context we focused the evaluation, test
and development work on storage systems enabled for
geographically-distributed data management: data access, data
replication, data recovery and backup in WAN scenarios. HadoopFS and
GlusterFS distributed file-system have been mainly considered in this analysis.
Data availability in a distributed environment is a key point in the
definition of the computing model for an HEP experiment. Among all the possible interesting data models, we identify the WAN
direct access via reliable and robust protocols such as HTTP/WebDAV and
xrootd as a viable option. The development of a dedicated library has
been carried on allowing an optimized file access procedure on remote
storage resources. The implemented features include read-ahead and data
prefetching techniques, caching mechanism and optimized target file
localization. The results of performance and efficiency tests will be
presented for the treated subjects trying to describe in conclusion the
general strategy lines and technologies for the drafting of a concrete
data model design report.
Primary authors
Dr
Armando Fella
(INFN Pisa)
Mr
Domenico Diacono
(INFN Bari)
Dr
Giacinto Donvito
(INFN-Bari)
Mr
Giovanni Marzulli
(GARR)
Paolo Franchini
(Universita e INFN (IT))
Dr
Silvio Pardi
(INFN)
Co-authors
Alberto Gianoli
(Universita di Ferrara (IT))
Mr
Alessio Gianelle
(INFN Padova)
Andrea Di Simone
(Universita e INFN Roma Tor Vergata (IT))
Bruno Santeramo
Cristian De Santis
(Universita degli Studi di Roma Tor Vergata (IT))
Domenico Del Prete
(I.N.F.N.)
Eleonora Luppi
(Universita di Ferrara (IT))
Dr
Elisa Manoni
(INFN Perugia)
Fabrizio Bianchi
Francesco Giacomini
(INFN CNAF)
Guido Russo
(Universita e INFN (IT))
Luca Tomassetti
(University of Ferrara and INFN)
Luis Alejandro Perez Perez
(INFN Sezione di Pisa)
Marcin Jakub Chrzaszcz
(Polish Academy of Sciences (PL))
Marco Corvo
(INFN)
Matteo Manzali
(Istituto Nazionale Fisica Nucleare (IT))
Matteo Rama
Mr
Milosz ZDYBAL
(Institute of Nuclear Physics, Polish Academy of Science)
Rafal Zbigniew Grzymkowski
(P)
Prof.
Roberto Stroili
(Università degli Studi di Padova & INFN)
Mr
Stefano Longo
(INFN CNAF)
Steffen Luitz
(SLAC National Accelerator Laboratory (US))
Dr
Vincenzo Ciaschini
(Istituto Nazionale Fisica Nucleare (IT))
