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RAL Tier1 Experiments Liaison Meeting

→ Europe/London
Access Grid (RAL R89)

Access Grid

RAL R89
Description

Please attend via the following Zoom meeting:

https://ukri.zoom.us/j/98562731547?pwd=UU9Wb2xCL05tWmROT1h6SUlWdUJ3dz09

    • 13:38 → 13:39
      Major Incidents Changes 1m
    • 13:39 → 13:40
      Summary of Operational Status and Issues 1m
      Speakers: Brian Davies (Lancaster University (GB)), Darren Moore (Science and Technology Facilities Council STFC (GB))
      RT1EL-20210127.docx
      RT1EL-20210127.pdf
    • 13:40 → 13:41
      GGUS /RT Tickets 1m

      https://tinyurl.com/T1-GGUS-Open
      https://tinyurl.com/T1-GGUS-Closed

    • 13:41 → 13:42
      Site Availability 1m

      https://lcgwww.gridpp.rl.ac.uk/utils/availchart/

      https://cms-site-readiness.web.cern.ch/cms-site-readiness/SiteReadiness/HTML/SiteReadinessReport.html#T1_UK_RAL

      http://hammercloud.cern.ch/hc/app/atlas/siteoverview/?site=RAL-LCG2&startTime=2020-01-29&endTime=2020-02-06&templateType=isGolden

    • 13:42 → 13:43
      Experiment Operational Issues 1m
    • 13:44 → 13:45
      VO-Liaison ATLAS 1m
      Speakers: James William Walder (Science and Technology Facilities Council STFC (GB)), Dr Tim Adye (Science and Technology Facilities Council STFC (GB))

      GGSU: 150312(closed); Problems with Rucio update and staging files from tape. Central issue and hot-fix applied.

      Drop in ATLAS jobs yesterday evening; no obvious attribution to RAL problems; similarly not aware of ATLAS issues. Recovering now.

      Test gateway accidentally added to production davs transfers (rather than for FT).
      - performance not great. 

    • 13:46 → 13:47
      VO Liaison CMS 1m
      Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))

      One problem to chase up this week with the intermittent SAM test failures (xrootd access test). This looks for a file at RAL, but via AAA global redirector. It's not clear from the test debug messages, but I suspect a timeout. If the file is only coming from Echo, as it should be, then I see no reason why this is happening. I need to find the full job logs to investigate.

      No updates/changes on other matters.

    • 13:48 → 13:49
      VO Liaison LHCb 1m
      Speaker: Raja Nandakumar (Science and Technology Facilities Council STFC (GB))

      LHCb:

      • LHCb File access issue on ECHO :
        • GGUS ticket closed
        • Development on LHCb side to use later versions of xrootd (>=4.10)
        • Some edge cases still ongoing
      • ECHO streaming issue:
        • Waiting for development of xrootd-ceph interface
        • Still investigating mitigation possibilities
      • Slow drop in LHCb jobs over the last few days
        • Seems to have largely recovered now (last 24 hours).

      DUNE:

      Nothing particular to report.

    • 13:52 → 13:53
      VO Liaison Others 1m
    • 13:53 → 13:54
      Experiment Planning 1m
    • 13:54 → 13:55
      Dune/protoDune 1m
    • 13:55 → 13:56
      Euclid 1m
    • 13:56 → 13:57
      SKA 1m
    • 13:57 → 13:58
      AOB 1m
    • 13:58 → 13:59
      Any other Business 1m
      Speakers: Brian Davies (Lancaster University (GB)), Darren Moore (Science and Technology Facilities Council STFC (GB))