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The Physics Services Support (PSS) group supports the LHC experiments' computing
systems during commissioning and exploitation in the framework of the LCG
project. The activities encompass the preparation, the deployment and the
support of infrastructure services as well as components belonging to the
experiment frameworks.
The group consists of two sections, Database Services for Physics (DP)
and Experiment Integration and Distributed Analysis (ED).
The Physics Database
Services activity provides Oracle-based services to the Physics community at
CERN deployed on 2-node Oracle 10g Real Application Clusters (RAC).
The Physics Database
Services team provides
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resource allocation
to the experiments,
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DBA service for the
physics community, supporting the LHC Computing Grid services (such as the
LCG file catalog LFC or the gLite file transfer FTS) and the services for
the POOL and COOL projects,
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on-call service
providing 24/7 database support for the physics community.
The LCG database
projects include applications related to detector construction,
book-keeping, event-level metadata as well as developing physics database
applications and providing optimization consultancy. In particular
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co-ordinating the
LCG
3D project (Distributed Deployment of Databases for LCG) which as a
joint project between IT, experiments, grid projects and LCG sites
defining and implementing a distributed database service across LCG Tier-0,
Tier-1 and Tier-2 sites,
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leading the LCG
persistency framework projects (POOL
and/or
COOL ) as baseline solutions for three LHC experiments as joint projects
with the experiments within the LCG Application Area. This activity also
includes developments for distributed deployment of these packages as part
of the 3D project.
The close relationship
between these activities (local and distributed service implementation and
provision of the LCG common software) ensures a tight integration of software
and service.
The
Experiment Integration and Distributed Analysis section provides direct
support to all LHC experiments (ALICE, ATLAS, CMS and LHCb). The section
contains the activities of the LCG/EIS
team and LCG/ARDA
project and the EGEE NA4 (Applications Identification and Support). The ED
section is one of a major contributor in the LCG/EGEE experiments task forces.
Main line of activities are
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contribution in the testing, sustainable
evolution, customization and support of the current middleware deployed on
the EGEE infrastructure and being developed for EGEE/LCG including
significant contributions to the gLite middleware such as the ARDA Metadata
Grid Application (AMGA),
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collaboration and support of large-scale
resources usage (data challenges and production activities) and supporting
users (user guide and tutorials),
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provision of support in porting and
optimizing applications to the grid environment,
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direct contribution to the development
and delivery of the experiment systems for distributed computing (high-level
experiment specific services) such as GANGA (ATLAS and LHCb), CRAB and
Dashboard (CMS), and the C-Acces library and xrootd (ALICE).
The projects of the PSS group are supported
in part by the
EGEE
project, partners of the
WLCG collaboration
and industrial partners of the
CERN openlab.
Due to the multidisciplinary nature of EGEE,
some small effort is devoted to liaise with other communities such as Biomed and
GEANT4 . |
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