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RAL Tier1 Experiments Liaison Meeting

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

      Apologies, Katy is at CMS O&C management 3-day meeting.

      ARC-CE token SAM test failures again, this time possibly properly fixed by a downgrade in software version at the CMS end. 

      Reminder to self: Still to look at the /unmerged/ problem.

    • 4
      LHCb Operations Report
      Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

      News:

      • Heavy Ion data distribution started
        • RAL is going to get ~650TB

       

      Operational issues:

      • High failure rate for MCSimulation jobs is still present
        • Incorrect CPU requirement from LHCb
          • Per-job CPU limits are set in DB-12 seconds (DB-12 is LHCb benchmark);
          • DB-12 was supposed to match HS06 some time ago, but it is no longer the case;
          • At RAL the difference between HS23 and DB12 is quite significant, more than at other sites (probably due to HyperThreading?), therefore we are more affected by this problem;
        • Would it be possible to expose HS23 value of the WN's cores somehow (e.g. via env variable)?
      • DRIAC FileCatalog issues last Thursday and Friday
        • Probably caused by some DB issues at CERN, though not verified yet
        • Resulted in lots of completed and failed jobs across the grid.
    • 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))
    • 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
      17062026_Ral-Tier1-Experiments-Liaison-Meeting_Commissioning-Update.pdf
    • 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 17 June 2026.docx
      Weekly Report 17 June 2026.pdf
    • 11
      Any other Business
      Speakers: Brian Davies (Science and Technology Facilities Council STFC (GB)), Darren Moore