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STFC-RAL site report

STFC-RAL site report. Chris Kruk 18 th February 2009. Topics:. Current infrastructure overview Software overview Operational Challenges Plans for 2009 and beyond. Current infrastructure (1/8):. 4 production instances: Atlas CMS LHCB General (Alice, ILC, Mice, Minos, Dteam, hOne)

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STFC-RAL site report

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  1. STFC-RAL site report Chris Kruk 18th February 2009 Chris Kruk, STFC-RAL

  2. Topics: • Current infrastructure overview • Software overview • Operational Challenges • Plans for 2009 and beyond Chris Kruk, STFC-RAL

  3. Current infrastructure (1/8): • 4 production instances: • Atlas • CMS • LHCB • General (Alice, ILC, Mice, Minos, Dteam, hOne) • 2 test instances: • PreProduction • Certification Chris Kruk, STFC-RAL

  4. Current infrastructure (2/8):Atlas • 3 head nodes • 143 disk server ~1.1PB • 96 DS in production • 47 DS in atlasNonProd • 2 DB RAC nodes for stager and SRM and 1 shared for DLF • 2 dedicated and 8 shared tape drives Chris Kruk, STFC-RAL

  5. Current infrastructure (3/8):CMS • 3 head nodes • 81 disk server ~800TB • 2 DB RAC nodes for stager and SRM and 1 shared for DLF • 2 dedicated and 8 shared tape drives Chris Kruk, STFC-RAL

  6. Current infrastructure (4/8):LHCB • 3 head nodes • 28 disk server ~180TB • 2 DB RAC nodes for stager and SRM and 1 shared for DLF • 2 dedicated and 8 shared tape drives Chris Kruk, STFC-RAL

  7. Current infrastructure (5/8):General • 3 head nodes • 20 disk server ~80TB • 2 DB RAC nodes for stager and SRM and 1 shared for DLF, 1 repack node • 1 dedicated and 8 shared tape drives Chris Kruk, STFC-RAL

  8. Current infrastructure (6/8):PreProduction • 2 head nodes • floating number of disk server • 2 DB RAC nodes for stager and NS • 1 dedicated tape drive Chris Kruk, STFC-RAL

  9. Current infrastructure (7/8):Certification • 3 head nodes • 6 disk server ~6TB • 1 standalone DB for everything • 1 dedicated tape drive Chris Kruk, STFC-RAL

  10. Current infrastructure (8/8):Shared services Nameservers: 2 servers for nsdaemon DNS load-balanced cluster 1 of these also hosts: vdqm, vmgr, cupv Tape servers: 18 servers FC-attached STK T10k tape drives Chris Kruk, STFC-RAL

  11. Software overview (1/2): • Operation system: • Central servers- SLC 4.7 (64bit) • Tape server- SLC 4.7 (64bit) • Disk servers- SL 4.4 (32bit) • SRM servers- SLC 4.7 (64bit) • DB servers- RH Enterprise, AS release 4 (32bit) Chris Kruk, STFC-RAL

  12. Software overview (2/2): • Castor version: • 2.1.7-19 head nodes • 2.1.7-12 name servers • 2.1.7-15 tape servers • LSF 7.0.2.98817 • DB: Oracle 10g • SRMv2 2.7-12 Chris Kruk, STFC-RAL

  13. Operational challenges(1/2): • Occasional unresponsiveness from JobManager for 2-3 minutes: • delay with jobs reaching the job manager from the stager • delay with jobs reaching LSF • Very big values inserted in id2type (aka bigID problem) Chris Kruk, STFC-RAL

  14. Operational challenges(2/2): • Oracle unique constraint violations in RH • Possible crosstalk between atlas and lhcb stagers • Migration performance • Recurrent stuck recalls • Problem with stuck disk2disk copies not seen in 2.1.7 Chris Kruk, STFC-RAL

  15. Plans for 2009 and beyond(1/4): • Upgrades: • Castor 2.1.7-24 • SRMv2 2.7-15 • Test activities: • VDQM2 • Black&white list • Gridftp-internal Chris Kruk, STFC-RAL

  16. Plans for 2009 and beyond(2/4): • Test activities: • Testing new tape families • DB cross talk • Virtual disk servers • Resilience and availability: • Improve monitoring system (Nagios) • Improve server deployment mechanism Chris Kruk, STFC-RAL

  17. Plans for 2009 and beyond(3/4): • Resilience and availability: • Improve disaster recovery and backup • Improve resilience for stager, LSF, jobmanager and scheduler • Deploy redundant LSF and load-balanced stagers if possible Chris Kruk, STFC-RAL

  18. Plans for 2009 and beyond(4/4): • Server room migration into the new building • Installing second tape robot • Possible use of T10KB tape drives • Increase number and capacity of DB disk arrays • Increase RAM to 8GB Chris Kruk, STFC-RAL

  19. Questions? Chris Kruk, STFC-RAL

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