r4 - 28 Apr 2009 - 14:36:29 - KaushikDeYou are here: TWiki >  Admins Web > MinutesDataManageApr28

MinutesDataManageApr28

Introduction

Minutes of the US ATLAS Data Management meeting, Apr 28, 2009
  • Previous meetings and background : IntegrationProgram
  • Coordinates: Tuesdays, Noon Central
    • (309) 946-5300, Access code: 735188; Dial *6 to mute/un-mute.

Attending

  • Meeting attendees: Pedro, Bob, Saul, Armen, Patrick, Wei, Charles, Hiro, Wensheng, Tom, Michael
  • Apologies: Shawn, John
  • Guests: None

Topics for this week

  • HPSS/dcache status - Pedro
    • Note special dcache optimization meeting tomorrow at BNL: MinutesBNLdcacheApr29
    • new drives have been installed
    • currently ATLAS has 20 drives (drive usage)
    • only 500 stage requests @ 9h30
    • reduce pnfs machine load during vacuum is still a work in progress
  • Storage cleanup - All
    • cleanse only does dq2-delete-replicas, not bulk deletion - so why are we seeing _sub deletion from deletion monitoring page? Need to follow up.
    • checked list of 60k obsolete datasets against LFC and pnfs space - only found few hundred files? Strange. Let this scan finish. Follow up by email.
    • ESD central cleanup will start soon at Tier 2's for Tier 0 datasets on DATADISK
  • DQ2 adler32 plugin - Hiro
    • DQ2 never retries. Follow up with DQ2 team.
    • Will become part of DQ2 release soon
  • SCRATCHDISK deployment
    • BNL - done, AGLT2 - 9TB (45TB total, done), MWT2 - 10 TB (done), NET2 - flexible TB (done), SLACT2, SWT2 - later, after cleanup
    • Maybe problem for XRootD? sites - name of SCRATCHDISK too long. Wei will follow-up with Andy.
  • BNL migration to space tokens - Armen, Pedro, Hiro
    • space has been allocated :: RT-12748 and RT-12749
    • Hiro finished all permission changes (as much as possible) - will keep an eye next few weeks
    • Panda team working on migration since 10 am today
  • Hot issues
    • Completing datasets at T2 - consistency checking, ongoing at AGLT2
    • Existing file problem - could be central deletion problem (sometimes file, sometimes LFC, never both?)? GGUS ticket 48200.
  • AOB
    • Hiro doing consistency check at BNL, comparing LFC against pnfs, followup next week
    • >17M pnfsid's stored now in LFC
    • Hiro - still ongoing checksum problems from BNL network card drivers (?) - two thumpers have lots of errors
    • Saul - still checking files at NET2 (will delete and resubscribe)


-- KaushikDe - 27 Apr 2009

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