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    RAL Tier1 Experiments Liaison Meeting

    → Europe/London
    Access Grid (RAL R89)

    Access Grid

    RAL R89
      • 12:38 → 12:39
        Major Incidents Changes 1m
      • 12:39 → 12:40
        Summary of Operational Status and Issues 1m
        Speakers: Brian Davies (Lancaster University (GB)), Darren Moore (Science and Technology Facilities Council STFC (GB))
        RT1EL-2602020.docx
        RT1EL-2602020.pdf
      • 12:40 → 12:41
        GGUS /RT Tickets 1m

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

      • 12:41 → 12:42
        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

      • 12:42 → 12:43
        Experiment Operational Issues 1m
      • 12:44 → 12:45
        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))

        CERN outage of CEPH last Thursday Recovery at 1900 (CERN).; RAL ATLAS back to usual by Friday pm
        Suspected root cause - bit flipping which is still not understood or fixed;

        Data Carousel proceeding well; first tranche of data staged by Friday afternoon; some data now following. Further datasets queuing.

        stage-in, stage-out issues:
          For stage-out; Rucio experts believe to have a solution in 1.29.1 (still to be deployed). For ANALY_RAL queue, fallback transfer methods of xrdcp and gfalcopy were added back - still to investigate if this bandages the solution (for this queue).
         For stage-in; starting to investigate again.

        Recent discussion on Squids from UK sites accessing CERN at high rate? Possible RAL Firewall issues?
         

      • 12:46 → 12:47
        VO Liaison CMS 1m
        Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))
      • 12:48 → 12:49
        VO Liaison LHCb 1m
        Speaker: Raja Nandakumar (Science and Technology Facilities Council STFC (GB))
      • 12:52 → 12:53
        VO Liaison Others 1m
      • 12:53 → 12:54
        Experiment Planning 1m
      • 12:54 → 12:55
        Dune/protoDune 1m
      • 12:55 → 12:56
        Euclid 1m
      • 12:56 → 12:57
        SKA 1m
      • 12:57 → 12:58
        AOB 1m
      • 12:58 → 12:59
        Any other Business 1m
        Speakers: Brian Davies (Lancaster University (GB)), Darren Moore (Science and Technology Facilities Council STFC (GB))