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    RAL Tier1 Experiments Liaison Meeting

    → Europe/London
    Access Grid (RAL R89)

    Access Grid

    RAL R89
    RAL Tier1 Experiments Liaison Meeting
    Zoom Meeting ID
    66811541532
    Host
    Alastair Dewhurst
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      • 1
        Site Operations
      • 13:34
        Experiment Operational Issues
      • 2
        ATLAS Operations Report
        Speakers: Brij Kishor Jashal (Rutherford Appleton Laboratory), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)
        Brij ATLAS liason meeting notes of the week
      • 3
        CMS Operations Report
        Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))

        Apologies, Katy is at the FTS/XRootD joint workshop and will not join the meeting.

        Still seeing intermittent failures on the (token version of the) CVMFS test, see https://cmssst.web.cern.ch/siteStatus/detail.html?site=T1_UK_RAL

        The error is here: https://monit-grafana.cern.ch/d/siYq3DxZz/wlcg-sitemon-test-details?orgId=20&var-metric=org.cms.WN-02cvmfs-%2Fcms-ce-token&var-dst_hostname=arc-ce01.gridpp.rl.ac.uk&var-timestamp=1789520050569&from=now-1y&to=now&timezone=utc&var-Filters=data.summary%7C%3D%7Ccmssgm-3252819.0-lcg2392.gridpp.rl.ac.uk:%20CRITICAL:%20critical%20CVMFS%20filesystem%20inaccessible

        Also, the certificate version of the CVMFS test appears to not be running. Interestingly this applies also to RALPP, but no other sites (ARC-CE users or otherwise) that I can see from a quick look. 

        Job performance looks good.

      • 4
        LHCb Operations Report
        Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)
      • 5
        ALICE Operations Report
        Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)
      • 6
        LSST Operations Report
        Speakers: Thomas Birkett, Timothy Noble (Science and Technology Facilities Council STFC (GB))
        • Some jobs over the last week that included some testing of caching certain highly used files:

        With the IO being dramitically reduced (take with a pinch of salt as was also during the time that the cert change was happening with OpenSearch)

         

      • 14:00
        Tier-1 Projects
      • 7
        XRootD Development
        Speakers: Alexander Rogovskiy (Rutherford Appleton Laboratory), Jyothish Thomas (STFC)
      • 8
        Utilizing GPUs
        Speakers: Dr Brij Kishor Jashal (Rutherford Appleton Laboratory), Thomas Birkett
      • 9
        Hardware deployment

        Echo SN
        WN
        GPU

        Speaker: Jacob Ward
      • 14:45
        AOB
      • 10
        Summary of Operational Status and Issues
        Speakers: Brian Davies (Science and Technology Facilities Council STFC (GB)), Darren Moore, Thomas Birkett
        Weekly Report 16 September 2026.docx
        Weekly Report 16 September 2026.pdf
      • 11
        Any other Business
        Speakers: Brian Davies (Science and Technology Facilities Council STFC (GB)), Darren Moore