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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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      • 13:30 → 13:34
        Site Operations 4m
      • 13:34 → 13:35
        Experiment Operational Issues 1m
      • 13:35 → 13:40
        ATLAS Operations Report 5m
        Speakers: Brij Kishor Jashal (Rutherford Appleton Laboratory), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)
        Brij ATLAS liason meeting notes

        Brij on annual leave, report attached

      • 13:40 → 13:45
        CMS Operations Report 5m
        Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))

        Problems today and yesterday with various parts of the system - CMS SAM tests, CRAB submissions, anything else that needs to generate a regular voms proxy. By the end of this morning Maarten Litmaath says it is fixed - waiting for green SAM tests. This is on top of the issues with the UK-CA - as far as I know this is not causing any problems currently in CMS production. 

        Production jobs in last 30 days: some spikes of job failures with 'file open' type errors, using remote reads. Probably related to issues with AAA. 

      • 13:45 → 13:50
        LHCb Operations Report 5m
        Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)
        jobs.png
        transfers_from.png
        transfers_to.png

        All quiet in the last couple of weeks.

        Staging of the 2025 turbo stream data is ongoing, all data at RAL has been staged. The 2026 starts soonish.

        Operational issues:

        • MCSimulation job failures due to CPU limit
          • The fix has been prepared and should be deployed in the next DIRAC release (probably next week)
      • 13:50 → 13:55
        ALICE Operations Report 5m
        Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)
        • Potential xrootd version problem after the EOS upgrade on the preprod tape SE instance
        • A sandbox for installing mlsensor is ready -- is it OK to test it on one of the Alice gateways/redirectors?
      • 13:55 → 14:00
        LSST Operations Report 5m
        Speakers: Thomas Birkett, Timothy Noble (Science and Technology Facilities Council STFC (GB))
      • 14:00 → 14:01
        Tier-1 Projects 1m
      • 14:05 → 14:10
        XRootD Development 5m
        Speakers: Alexander Rogovskiy (Rutherford Appleton Laboratory), Jyothish Thomas (STFC)
      • 14:15 → 14:20
        Utilizing GPUs 5m
        Speakers: Dr Brij Kishor Jashal (Rutherford Appleton Laboratory), Thomas Birkett
      • 14:25 → 14:45
        Hardware deployment 20m

        Echo SN
        WN
        GPU

        Speaker: Jacob Ward
      • 14:45 → 14:46
        AOB 1m
      • 14:50 → 14:59
        Summary of Operational Status and Issues 9m
        Speakers: Brian Davies (Science and Technology Facilities Council STFC (GB)), Darren Moore, Thomas Birkett
        Weekly Report 02 September 2026.docx
        Weekly Report 02 September 2026.pdf
      • 15:00 → 15:05
        Any other Business 5m
        Speakers: Brian Davies (Science and Technology Facilities Council STFC (GB)), Darren Moore