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ATLAS TIER3 in Valencia

ATLAS TIER3 in Valencia. Santiago González de la Hoz IFIC – Instituto de Física Corpuscular (Valencia). Tier 3 prototype at IFIC. Desktop Or Laptop (I). Atlas Collaboration Tier2 resources (Spanish T2) (II). ATLAS Tier3 resources ( Institute ) (II).

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ATLAS TIER3 in Valencia

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  1. ATLAS TIER3 in Valencia Santiago González de la Hoz IFIC – Instituto de Física Corpuscular (Valencia)

  2. Tier 3 prototype at IFIC Desktop Or Laptop (I) Atlas Collaboration Tier2 resources (Spanish T2) (II) ATLAS Tier3 resources (Institute) (II) Special requirements – PC farm to perform interactive analysis (III) Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  3. Individual Desktop or Laptop • Access to ATLAS software via AFS (Athena, root, atlantis, etc..) • /afs/ific.uv.es/project/atlas/software/releases • This is not easy, we have used the installation kit but this is not working for development or nightly releases • Is everything needed for detector software development inside the kit ? • Install the kit directly in AFS is not very practical. At least AFS volumes has to be created previously • Local checks, to develop analysis code before submitting larger jobs to the Tier1-2 via Grid • Use the ATLAS Grid resources (UI) • /afs/ific.uv.es/sw/LCG-share/sl3/etc/profile.d/grid_env.sh • DQ2 installed at IFIC AFS • /afs/ific.uv.es/sw/LCG-share/sl3/etc/profile.d/grid_env.sh • Users could search data and copy them to the local SE. • Ganga client installed • /afs/ific.uv.es/project/atlas/software/ganga/install/etc/setup-atlas.sh • Users can send jobs to the Grid for their analysis or production L X P L U S Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  4. Phase (I) done • From any PC at IFIC with AFS (i.e. 12.0.6) • Requirements file at cmthome: #--------------------------------------------------------------------- set CMTSITE STANDALONE set SITEROOT /afs/ific.uv.es/project/atlas/software/releases macro ATLAS_DIST_AREA /afs/ific.uv.es/project/atlas/software/releases macro ATLAS_TEST_AREA ${HOME}/testarea apply_tag projectArea macro SITE_PROJECT_AREA ${SITEROOT} macro EXTERNAL_PROJECT_AREA ${SITEROOT} apply_tag setup apply_tag simpleTest use AtlasLogin AtlasLogin-* $(ATLAS_DIST_AREA) set CMTCONFIG i686-slc3-gcc323-opt set DBRELEASE_INSTALLED 3.1.1 #--------------------------------------------------------------------- • Release test: source /afs/ific.uv.es/project/atlas/software/releases/CMT/v1r19/mgr/setup.sh cd $HOME/cmthome/ cmt config /usr/kerberos/bin/kinit -4 sgonzale@CERN.CH source ~/cmthome/setup.sh -tag=12.0.6,32 cd $HOME/testarea/12.0.6/ cmt co -r UserAnalysis-00-09-10 PhysicsAnalysis/AnalysisCommon/UserAnalysis cd PhysicsAnalysis/AnalysisCommon/UserAnalysis/cmt source setup.sh gmake Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  5. Local SE STORM & Lustre GANGA Athena AOD Analysis ROOT/PROOF DPD or Ntuple Analysis • -Work with ATLAS software • Use of final analysis tools (i.e. root) • User disk space • Ways to submit our jobs to other grid sites • Tools to transfer data Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  6. Phase (II) resources coupled to Spanish ATLAS TIER2 (in progress) • Nominal: • ATLAS Collaboration resources: TB (SE) and CPU (WN) • Tier2 Extra resources: • WNs and SEs used only by Tier3 users • Using different/share queues • To run local and private production • Production of MC samples of special interest for our institute • AOD for further analysis • To analyze AOD using GRID resources (AOD analysis on millions of events) • To store interesting data for analysis Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  7. Phase (III) a PC farm to perform interactive analysis outside Grid (it will be deployed) • Interactive analysis: DPD analysis (i.e. HightPTview, SAN, or AODroot ..) • Install PROOF in a PC farm: • Parallel ROOT facility. System for interactive analysis of very large sets of ROOT data files • Outside the Grid • 8-10 nodes • Fast Access to the data: Lustre and/or xrootd (filse systems) • Storm and Lustre under evaluation at IFIC • Xrootd • Tier3 Grid and non-Grid resources are going to use the same SE Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  8. StoRM • Posix SRM v2 • Under testing. Being used in preproduction farm. • Temporally using UnixfsSRM (dCache SRM v1 ) for production in Tier2 • Lustre in production in our Tier2 • High performance file system • Standard file system, easy to use • Higher IO capacity due to the cluster file system • Used in supercomputer centers • Free version available • www.lustre.org Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  9. ATLAS Spanish Tier2 • Distributed Tier2: UAM(25%), IFAE(25%) and IFIC(50%) • Inside our Tier2 two SE options are used. In case that Lustre won’t work as expected we will switch to dCache Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  10. Hardware • Disk servers: • 2 SUN X4500 (two more in place to be installed in the near future, used for testing) • 34 TB net capacity • Connectivity: • Switch Gigabit CISCO Catalyst 4500 • Grid Access: • 1 SRM server (P4 2.7 GHz, GbE) • 1 GridFTP server (P4 2.7 GHz, GbE) • Lustre Server: • 1 MDS (Pentium D 3.2 GHZ, R1 disk) Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  11. Plans • Put StoRM in production (SRM v2) • Add more gridftp servers as demand increases. • Move the Lustre server to a High Availability hardware. • Add more disk to cope with ATLAS requirements and use. • Give direct access to lustre from WN. Scientific Linux 4 is required. Some testing under way to try to install lustre kernel into SL 3. • Performance tuning Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  12. Tests: RFIO without Castor Athena analysis 12.0.6 AOD's 4 MB/s CPU limited and Athena Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  13. The same test with DPD Both cases Lustre was used and data in the cache 1.8 MB/s with Root 340 MB/s with a simple “cat” 2 x Intel Xeon 3.06GHz 4 GBytes RAM 1 NIC Gigabit Ethernet HD: ST3200822AS (Using a 3Ware card: 8006-2LP) Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

  14. Summary • From her/his desktop/laptop individual physicist can get access to: • IFIC Tier2-Tier3 resources. • ATLAS software (Athena, Atlantis, etc..), DDM/dq2 and Ganga tools. • IFIC Tier3 resources will be split in two parts: • Some resources coupled to IFIC Tier2 (ATLAS Spanish T2) in a Grid environment • AOD analysis on millions of events geographically distributed. • A PC farm to perform interactive analysis outside Grid • To check and validate major analysis task before submitting them to large computer farms. • A PROOF farm will be installed to do interactive analysis. Santiago González de la Hoz, ATLAS software workshop 24-Oct-2007

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