r2 - 09 Jun 2009 - 14:05:26 - KaushikDeYou are here: TWiki >  Admins Web > MinutesDataManageJun9

MinutesDataManageJun9

Introduction

Minutes of the US ATLAS Data Management meeting, June 9, 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: Bob, Shawn, Patrick, Charles, Armen, Saul, Pedro, Rob, Michael, Wensheng
  • Apologies:
  • Guests:

Topics for this week

  • STEP09 status - All
    • Pedro - yesterday problem with write pools on DATATAPE, looks ok now
    • Michael, Hiro - don't understand large backlog in DATADISK, everything looks fine in FTS, seems to be bandwidth issue (but was transferring twice as fast couple of days ago), problem started ~24 hours ago
    • Michael - puzzling, no transfers reported, but no transfer activity (KD will follow up by email)
    • Shawn - everything looks fine (will seek clarification why plots are red)
  • Available storage - Armen, all
    • Keeping eye on BNL, will add more today, have 380 TB on reserve
    • Tier 2's look OK except SLAC
  • Checksum validation in SS - All
    • SLAC, AGLT2, UC, IU soon, NET2 working on it, SWT2 worried about load on SS (looking into dataserver doing it)
    • BNL implemented locally, what to do about DATADISK/DATATAPE/AGLT2_CALIBDISK (SS running from CERN)?
    • No current solution for Tier 3? Can Chimera solution be ported?
  • Obsolete and ccrc dataset cleanup - Charles, Hiro
    • New version of cleanup script working well, tested at UC & IU, adding capability to clear up arbitrary datasets (like ccrc), tested at UC
    • Check with Stephane if ccrc datasets are declared obsolete?
    • AGLT2 - found 90k empty directories after cleanup (will try new version), and many other DQ2/DDM oddities, cleaned up ~77Tb manually over past 2 weeks, ~20TB dark data (very labor intensive)
    • Hiro - assuming Stephane deleting from BNL too?
    • Need wiki/web pages, use CERN svn - Charles will follow up
  • Hot issues
    • Hiro - please specify BNL as source if trying to recover lost files at Tier 2's
  • AOB


-- KaushikDe - 09 Jun 2009

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