Tech Meeting Minutes 20101216

From ScotGrid

Present: Graeme, Sam, David, Peter, Stuart, Andy, Michael Apologies: Mark, Wahid

http://indico.cern.ch/conferenceDisplay.py?confId=117149

Backlink: http://www.scotgrid.ac.uk/wiki/index.php/ScotGrid_Technical_Meetings

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Hot Topics

  • Durham
    • Suffered failure of main switch into IPPP - networking lost, SRM down ticket from ATLAS. Now recovered, but may need downtime for switch replacement. Also nfs area problems.
  • Networking Document
    • Information is correct.
    • Glasgow: testing to improve utilisation of 6Gb/s shared (at the moment can't really get more than 140MB/s, which is a bit disappointing).
    • Edinburgh: 1Gb ok for now; good that network layout is very well understood.
    • Durham: 1Gb shared fine for foreseeable future.
    • ACTION: Graeme to send this info on to Pete Clarke.
  • Holiday Cover
    • Best efforts as usual. Use email except if there is a real emergency.
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Action Review

  • Edinburgh CREAM CE works - Andy applied a patch used by IN2P3 which uuencodes inputs and outputs. Need to customise the submission script to request 6GB VMEM. New ACTION.
    • Graeme noted that ATLAS try to set a shell VMEM limit much lower than this to trigger an athena out of memory error, avoiding a batch system kill.
  • Glasgow disk server maintenance: Sam is progressively draining SL4 servers; final decision on ext4 vs. xfs not yet taken. Saw high load on disk045, which is ext4 - ext4 performs better in later kernels.
  • Edinburgh analysis priority - no progress.
  • Edinburgh squid/cvmfs - to be discussed with Orlando; also use f2f meeting.
  • Glasgow pool account cleanup scripts - not yet done.
  • Edinburgh glite-APEL: have a VM, but not yet installed.
  • Durham glite-APEL: have a VM, but not yet installed.
    • There may be a 1 month stay of execution for R-GMA based accounting.
  • Glasgow analysis jobs now prevented from running on old CV kit.
  • Glasgow GFAL_LCG_INFOSYS now fixed.
  • Durham biomed VOMS fixed.
  • shift.conf issue was raised with DPM devs.
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AOB

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