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    RAL Tier1 Experiments Liaison Meeting

    → Europe/London
    Access Grid (RAL R89)

    Access Grid

    RAL R89
      • 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))
        report-t1l.docx
        report-t1l.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))

        New Accounting period starts:
          CPU (HEP-SPEC06) :   132,125 -> 156,436
          Disk (Tbytes)   :               11,000 ->   13,024
          Tape (Tbytes)   :               27,625 ->   32,708

        Data Carousel: 
          Data15 started yesterday (9 datasets); already >50% done

        GU queues:
        New queues created; will start to disable the old queues; 

         

        GGUS: 146360: Deletion failures from echo: 
        e.g.:
           gsiftp://gridftp.echo.stfc.ac.uk:2811/atlas:datadisk/rucio/data17_13TeV/e1/71/data17_13TeV.00339387.physics_Main.daq.RAW._lb0525._SFO-6._0002.data
          The deletion error rate peaked at about 10% at 1600, 31 March (with ~70TB/h deletion volume), and ~ 12GB/s deletion throughput.
        Now improved to near 100% efficiency, with ~ 2-3TB/h deletion volume; ~1GB/s throughput.

        Can be related to the data carousel processing model.
        No monitoring  seems to capture deletion information from Vande / kibana; needed?
        Do we know where the 'bottleneck' appears?

        'Lifetime model' data deletion set for next week (suspect a smaller effect).

         

      • 13:46 → 13:47
        VO Liaison CMS 1m
        Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))
      • 13:48 → 13:49
        VO Liaison LHCb 1m
        Speaker: Raja Nandakumar (Science and Technology Facilities Council STFC (GB))
      • 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))