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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

     

      • 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-1802020.docx
        RT1EL-1802020.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))
        20200902_ipv46_observations.pdf
      • 12:46 → 12:47
        VO Liaison CMS 1m
        Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))

        Networking investigations into the slow IPv4 transfers have started. They are doing some ping tests. Not much I can do for poor efficiencies while I wait for this. File read times have been very high ~5 hours per job on average, with read size not significantly higher.

        AAA service was failing SAM tests quite a bit this week. I tried restarting the services yesterday (Tues 25th around lunchtime). This didn't help at all, and there was then a period of failures. We just received a ticket as site readiness was failing yesterday. SAM tests for AAA look a little better today. Going to observe for a while. AAA doesn't seem too busy at the moment - earlier in the week it was doing up to 1 GB/s.

      • 12:48 → 12:49
        VO Liaison LHCb 1m
        Speaker: Raja Nandakumar (Science and Technology Facilities Council STFC (GB))

        LHCb:

        WN streaming issue:

        1. Waiting for xrootd development 
        2. Some configuration fine-tuning for the WN proxies and gateways to be handed over soon to roll out to the farm
          • Hopefully some results on Friday or next week
        3. Next on list : to look at the different batches of WNs

        DUNE:

        No major news. Most recent jobs failed as they were supposed to be running GPU code - investigating why the jobs even came to RAL (and other sites) instead of going to GPU farms alone.

      • 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))