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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))
        RT1EL-20200527.docx
        RT1EL-20200527.pdf



        All CREAM-CE services are going to be decommissioned at IN2P3-CC and IN2P3-CC-T2 grid site on 16 June 2020 during the Scheduled Downtime of the second trimester.

      • 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))
      • 13:46 → 13:47
        VO Liaison CMS 1m
        Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))
        Screen Shot 2020-05-27 at 13.47.00.png

        SAM tests have looked perfectly green for most of this week!

        However, since Friday (the problem with the batch farm running at half capacity was fixed on Monday) the CMS job efficiency has plummeted. Slight improvement today, but a bit disappointing after our excellent performance in the previous week. Going to create a ticket.

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

        LHCb :

        1. Problems with singularity namespace on the batch system
          • GGUS ticket https://ggus.eu/?mode=ticket_info&ticket_id=147098
          • Possibly caused by ATLAS update (GGUS ticket : 146651)
          • Affects MC simulation for RUNI data
            • Currently half the MC simulation productions are halted waiting for this
            • MC is bulk of the running jobs at RAL
        2. Current number of running jobs at RAL ~3K
          • Normally expect close to 8K
          • Possibly related to above issue.
        3. ECHO streaming issue
          • Change to buffer and seg sizes (segsize and maxbsz) has had no effect.
          • Next: testing out XRD_STREAMTIMEOUT (environment variable set within the job)

        DUNE:

        1. Idle over the weekend - possibly the batch farm issue.
          • Running jobs again
        2. Request made for history of ETF tests
          • Separate division (Monit) to provide this
          • Ticket opened. Not clear about timescale as yet
      • 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))