The experience with LCG GRID in Russia

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The experience with LCG GRID in Russia

• E.Lyublev, A.Selivanov, B.Zagreev
• ITEP, Moscow
• November 3, 2005

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ITEP history

• was founded on December 1, 1945.
• the heavy-water reactor was run in 1949
• in 1961 the 7-GeV proton synchrotron started
  operating. It was the first Russian proton
  accelerator using the strong focusing principle.
• Now ITEP is Russian scientific centers aimed at
  studying nuclear physics and physics of
  elementary particles.
• Institute occupies the area of the old eighteenth
  century estate "Cheremushki".

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ITEP

• Alikhanov Institute for Theoretical and
  Experimental Physics
• Russian Federation State Scientific Center

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ITEP in winter
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Research program

• Particle and nuclear physics
• Theoretical study
• Experimental research
• _at_ITEP accelerator
• _at_CERN, FNAL, DESY,KEK and other international
  centers
• 2B decay (Ge, Mo, Xe )

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Research program

• Low energy physics and chemistry
• Accelerator techniques
• Nuclear power facilities
• Medical physics
• Details www.itep.ru

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International collaboration

• DESY (Hamburg) ARGUS, H1, HERA-B
• CERN (Geneva) AMS, CHORUS, L3, ATLAS,
  ALICE, CMS, LHCb
• FNAL (Batavia) D0, E781(SELEX)
• GSI (Darmstadt) - CBM

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Russia participation in EGEE/LCG

• RDIG Russian Data Intensive Grid

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RDIG
PNPI
JINR
KIAM
ITEP
SINP
RRC KI
IHEP
IMPB
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ITEP EGEE/LCG production cluster
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ITEP EGEE/LCG production cluster
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ITEP EGEE/LCG hardware

• UI user interface
• CE computing element
• SE storage element
• WNs nodes for batch system
• Mon RGMa server
• VO Box server of Virtual Organization
• RDIG user support server
• LFC LCG File Catalog

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ITEP LCG parameters

• OS SLC 3.05
• MW LCG -2.6.0-9
• Bach system PBS with maui
• WNs P4(HT) -2.4Ghz 1Gb 80Gb
• SE
• Classic SE -1Tb
• dCache/srm 4Tb

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Network

• ITEP Network Backbone
• 1Gb Ethernet
• ITEP LAN
• 100Mb Ethernet
• Wireless
• WAN
• 1Gb channel (RAS)
• 100Mb channel (MSU)

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Application SW

• Alice Alien 2_4 (VO Box) AliRoot, ROOT,
  xrootd
• Atlas - VO-atlas-release-10.0.4
• CMS - OSCAR_3_6_5
• ORCA_8_7_1
• CMKIN_4_4_0_dar
• LHCb- Gaudi-v15r5
• DaVinci-v12r11

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Monitoring statistics

• GOC
• Gridice
• MonAlisa
• Farm statistics
• Network statistics

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GridIce
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RDIG Monitoring
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RDIG User Support
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ALICE DC04 statistics
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DC04 Summary

• About 7000 jobs have been successfully done at
  AliEn Russian sites in 2004. It is 4 from the
  total Alice statistics. Job efficiency is about
  75
• Quite visible participation in ALICE and LHCb
  Data Challenges
• ITEP part 70
• SE 1.7 TByte

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DC05 to be continued
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Timeline of PDC05/SC3
2005
Sep
Oct
Nov
Dec
Aug
Prototype data analysis (Phase 3)
ALICE data push -
reserved/shared bandwidth - test of FTS (Phase
2)
Job submission through LCG interface
Event production (Phase 1)
SC3 start of service phase
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Participating in Alice SC3
All experiment specific SW
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AliEn (AliCE Environment)

• The AliEn framework has been developed as the
  ALICE user entry point into the Grid world,
  shielding the users from its underlying
  complexity and heterogeneity. Through interfaces,
  it can use transparently resources of different
  Grids (LCG and INFN Grids). In the future, the
  cross-Grid functionality will be extended to
  cover other Grid flavours.
• The system is built around Open Source components
  and uses a Web Services model and standard
  network protocols. Less than 5 is native AliEn
  code (PERL).
• None of other Grid flavours provides a complete
  solution for the ALICE computing model. All these
  Grids provide a different user interface and a
  diverse spectrum of functionality.
• Therefore some of the AliEn services will
  continue to be used as the ALICE's single point
  of entry to the computing resources of other Grid
  and as a complement of their functionality. The
  foreign Grid will be accessed via interfaces.

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AliEn services structure

• Central services
• Catalogue
• Task queue
• Job optimization
• -etc.

File registration
AliEn CE/SE
Job submission
LCG UI
AliEn CE/SE
AliEn CE/SE
LCG RB
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ALICE interface to LCG

• Through a VO-Box, provided on the site
• LCG UI full mapping
• AliEn services (Cluster Monitor, CE, SES,
  MonALISA, PackMan, xrootd)
• VO-Box requirements published https//uimon.cern.
  ch/twiki/pub/LCG/ALICEResourcesAndPlans/alice_vobo
  x_requirements.doc

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ITEP LCG site as Tier2 in SC3 (ALICE)

• LCG 2.6
• FTS client
• SE Dcache with srm
• LFC
• Xrootd protocol
• Alien 2_4
• connectivity with TIER1 centers is an issue !

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Non LHC GRID activity

• Russian VO PHOTON for SELEX colleagues was
  organized in 2005
• Regional centre for AMS (VO in preparation)
• Collaboration with CBM project (GSI, Darmstadt)
• ITEP theory department is very interested

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Summary plans

• Ready for PDC05/SC3
• Further support of LHC experiments Data
  Challenges
• becomes a trivial task running automatically
• Increase significantly the power of ITEP farm in
  2006
• current installation occupies only 5 of
  infrastructure
• Concentrate on distributed analysis

connectivity with TIER1 centers is an issue !