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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
    Useful links
    Join via phone
    Zoom URL
      • 13:44 → 13:45
        Experiment Operational Issues 1m
      • 13:45 → 14:05
        Site Operations 20m
      • 14:05 → 14:10
        ATLAS Operations Report 5m
        Speakers: Brij Kishor Jashal (Rutherford Appelton Laboratory), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)
        ATLAS liason meeting notes Brij
      • 14:10 → 14:15
        CMS Operations Report 5m
        Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))
      • 14:15 → 14:20
        LHCb Operations Report 5m
        Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

        Operational issues:

        • Major network problem yesterday
          • Caused massive job failure as well as many upload failures from RAL WNs to ECHO
          • Fixed by hardware reboot
        • Spikes of WGProduction job failures at RAL 09.09 (early morning)
          • Buggy production, using xrootd 5.1.1 client
          • LHCb is now discussing removal of the affected software (linked to buggy xrootd versions) from their stack
        • Problems with Sanddbox Storage (at CERN) during the weekend
          • Resulted in a spike of rescheduled jobs
        • Lots of failed downloads from Echo to Lanzhou (`DIRAC.Client.cn`)
          • User error, probably expired/missing proxy
      • 14:20 → 14:25
        ALICE Operations Report 5m
        Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)
        alice_ral_se_avail.png

        Network issues yesterday affected ALICE tests for storage.

      • 14:25 → 14:30
        LSST Operations Report 5m
        Speakers: Mathew Sims, Timothy Noble (Science and Technology Facilities Council STFC (GB))

        Jobs running smoothly


        New Graduate (Chris Winterburn) working with LSST, getting up to speed with STFC and the project - will be working on deploying the messaging stack to a K8S infrastructure to mirror the US and Fr sites

         

         

         

      • 14:30 → 14:31
        Tier-1 Projects 1m
      • 14:45 → 14:55
        Anatares Upgrade 10m

        New EOS nodes
        Repack Progress

        Speakers: George Patargias, Thomas Byrne
      • 14:55 → 15:05
        XRootD Development 10m
        Speakers: Alexander Rogovskiy (Rutherford Appleton Laboratory), Jyothish Thomas (STFC)

        '24 gen deployment paused due to routing issues contacting icinga
        New graduate (Faiad) joined and will be working on a log parser and file monitoring system

      • 15:05 → 15:15
        Utilizing GPUs 10m
        Speakers: Jyoti Prakash Biswal (Rutherford Appleton Laboratory), Thomas Birkett
      • 15:15 → 15:20
        SSD Storage Evaluation 5m
      • 15:20 → 15:25
        Echo deployment 5m
      • 15:30 → 15:31
        AOB 1m
      • 15:31 → 15:40
        Summary of Operational Status and Issues 9m
        Speakers: Brian Davies (Lancaster University (GB)), Darren Moore
        Weekly Report 10 September 2025.docx
        Weekly Report 10 September 2025.pdf
      • 15:40 → 15:45
        Any other Business 5m
        Speakers: Brian Davies (Lancaster University (GB)), Darren Moore