Difference between revisions of "Atlas:Analysis Challenge"

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([http://lcg.in2p3.fr/wiki/index.php?title=Atlas:Analysis_Challenge ST summary])
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* <b>Test 82 - December 15-17</b> http://gangarobot.cern.ch/st/test_82/
* <b>Test 82 - December 15-17</b> http://gangarobot.cern.ch/st/test_82/
=====[http://lcg.in2p3.fr/wiki/index.php?title=Atlas:Analysis_Challenge  ST summary]=====
=====[http://lcg.in2p3.fr/wiki/index.php/Atlas:Analysis_Challenge-STsummary ST summary]=====
===== Phase 2 : Pathena Analysis Challenge  =====
===== Phase 2 : Pathena Analysis Challenge  =====

Version du 18:36, 17 décembre 2008

02/12/08 : E.Lançon, F.Chollet (Thanks to Cédric Serfon)

Information & Contact

Mailing list ATLAS-LCG-OP-L@in2p3.fr


  • measure "real" analysis job efficiency and turn around on several sites of a given cloud
  • measure data access performance
  • check load balancing between different users and different analysis tools (Ganga vs pAthena)
  • check load balancing between analysis and MC production

Required services @ T1

  • LFC catalog : lfc-prod.in2p3.fr
  • ATLAS Disk space : ATLASUSERDISK on T1 SE (fail-over for outputs in case of problems with T2 disk storage)

First exercise on the FR Cloud (December 2008)

Phase 1 : Site stress test oraganized by ATLAS and run centrally in a controlled manner (2 days)

DA challenges have been performed on IT and DE clouds in october 08. Proposition has been made to extend this cloud-by cloud challenge to the FR Cloud. See ATLAS coordination DA challenge meeting (Nov. 20)

First exercise will help to identify breaking points and bottlenecks. It is limited in time (a few days) and requires careful attention of site administrators during that period,in particular network (internal & external), disk, cpu monitoring. This first try (Stress tests) can be run centrally in a controlled manner. The testing framework is ganga-based.

Max Jobs Per Site: 300
Sites: TOKYO
Max Jobs Per Site: 300
Input DS Patterns: mc08.*Wmunu*.recon.AOD.e*_s*_r5*tid* 
ST summary
Phase 2 : Pathena Analysis Challenge
  • Data Analysis exercice open to physicists with their favorite application
  • Physicists involved : Julien Donini, Arnaud Lucotte, Bertrand Brelier, Eric Lançon, LAL ?, LPNHE ?


  • Dec 8 : stop of MC production
  • Dec. 8-9: 1rst round with Tokyo, CPPM, LPC (LAN limited to 1Gbps), GRIF-LPNHE
  • Dec 17 : restart of MC production
  • Dec 14 : stop of MC production
  • Dec. 15-16 : 2nd round with LAPP, CC-IN2P3-T2 (to be confirmed), Tokyo, CPPM, LPC, possibly GRIF (SACLAY, IRFU, LPNHE), RO-07 and RO-02
  • Dec 17 : restart of MC production
  • Dec 17 : Beginning of Analysis Challenge (Phase 2)

Target and metrics

  • Nb of events : Few hundred up to 1000 jobs/site
  • Rate (evt/s) : up to 15 Hz
  • Efficiency (success/failure rate) : 80 %
  • CPU utilization : CPUtime / Walltime > 50 %