r3 - 04 May 2010 - 16:22:34 - ShawnMckeeYou are here: TWiki >  Admins Web > MinutesDataManageMay4



Minutes of the US ATLAS Data Management meeting, May 4, 2010
  • Previous meetings and background : IntegrationProgram
  • Coordinates: Tuesdays, Noon Central
    • (605) 715-4900, Access code: 735188; Dial *6 to mute/un-mute.


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

Topics for this week

  • Space status - Armen, Wensheng
    • 100 TB for Tier 2's in 1 week, 70% MC, 30% DATA
    • AGLT2 added more capacity to MCDISK
    • NET2 cleaned up, but then got filled immediately (40 TB)
    • Followup if NET2 is getting ESD's on MCDISK?
    • SLAC at 90% - Armen will follow up
  • Slow transfers to Tier 2's - Hiro
    • Hiro sent email to Tier 2's to understand why some transfers are slow
    • Hiro - dashboard numbers are all wrong
    • Shares may not be optimal - talking to Simone
    • The bottleneck seems to be FTS
    • Hiro will look into throughput and share issues and make recommendation in 24 hours
    • Team of Hiro, Armen, Shawn, Wensheng... will study issue
  • Proposal for direct FTS channel from US Tier 2's to other Tier 1's - Discussion
    • Shawn, Charles - why not use * channel? This will keep these transfers together in same channel. Protect sites.
    • Hiro - will increase number of channels by factors of 2 and 3?
    • Hiro, Pedro - concern about additional load on SRM, who is responsible when problems happen, too many channels?
    • Immediate deletion from SCRATCHDISK - callback based?
  • Hot issues
    • Charles - local web page shows storage using decimal units (not binary). Armen - this is correct.
    • Charles - delete-obsolete? Should other sites run it? Go ahead and try at Tier 2's! Armen - please study the dump of what was deleted.
    • Shawn - developing PERL script to make plots out of ccc results.
  • AOB
    • Action item - Kaushik will follow up on topic of making all US sites consistent with long/short names in LFC

-- KaushikDe - 04 May 2010

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log test_delete-obsolete.log (2746.3K) | ShawnMckee, 04 May 2010 - 16:22 | Test (-n/dry-run) of delete-obsolete.py at AGLT2
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