r3 - 25 May 2010 - 14:05:45 - KaushikDeYou are here: TWiki >  Admins Web > MinutesDataManageMay25



Minutes of the US ATLAS Data Management meeting, May 25, 2010
  • Previous meetings and background : IntegrationProgram
  • Coordinates: Tuesdays, Noon Central
    • (605) 715-4900, Access code: 735188; Dial *6 to mute/un-mute.


  • Meeting attendees: Charles, Bob, Shawn, Saul, Wensheng, Armen, John, Hiro
  • Apologies: Wei, Patrick
  • Guests:

Topics for this week

  • Space status - Armen, Kaushik
    • We are running short of space everywhere
    • Future number of copies have been reduced for all US Tier 2's (see RAC minutes) - should reduce rate by at least factor of 2 (upto 3.5 for DESD's)
    • BNL free space at main space tokens - DATADISK: 70TB (+50), MCDISK: 300TB, SCRATCHDISK: 50TB, USERDISK: 25TB, GROUPDISK: 10TB
    • 100 TB dark data on DATADISK - Armen following up
    • SCRATCHDISK filling up fast - ADC will implement quotas, but software not ready
    • T2-s free space DATADISK/MCDISK - AGLT2 16TB/30TB, MWT2: 47TB/13TB, NET2: 8TB/10TB, SLAC: 40TB, SWT2: 45TB
    • US sites feel helpless - need to discuss better automatic deletion mechanisms with ADC
    • Saul will help Kaushik figure out what can be deleted right now!
  • USERDISK deletions - Hiro
    • 2 months policy needs changing? Let's wait.
    • Hiro will make a page with top 10 user at every site.
    • Hiro - still continuing with cleaning last years files
  • Data deletions - Armen, Wensheng
    • Continuing to delete based on lists made by Kaushik
    • Wensheng - will try to make list of duplicate datasets on USERDISK, SCRATCDISK and GROUPDISK in the US
  • Slow transfers to Tier 2's - Hiro
    • SLAC and SW
  • Hot issues
    • Hiro looking for dark files on MCDISK and DATADISK at BNL
    • Need to automatically delete empty datasets older than 2 weeks - Charles will look into making script
    • Wensheng - checksum by pilot at AGLT2, needs to update glite, Shawn/Bob will look into it
    • Shawn - why incomplete datasets on HOTDISK? Will follow up
  • AOB
    • Action item - delete-obsolete. Tier 2's will try. Armen - study the dump of what was deleted.
    • Action item - Kaushik will follow up on topic of making all US sites consistent with long/short names in LFC

-- KaushikDe - 24 May 2010

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