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RAL Tier1 Experiments Liaison Meeting

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Access Grid (RAL R89)

Access Grid

RAL R89
RAL Tier1 Experiments Liaison Meeting
Zoom Meeting ID
66811541532
Host
Alastair Dewhurst
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Zoom URL
    • 13:30
      Experiment Operational Issues
    • 1
      ATLAS Operations Report
      Speakers: Brij Kishor Jashal (Rutherford Appelton Laboratory), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)
      ATLAS liason meeting notes Brij
    • 2
      CMS Operations Report
      Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))

      Performance is good for jobs and transfers.

      Fixed the problem with SAM test files that sit on the Antares buffer.

      ARC-CE token SAM test failed again for a while (all sites using ARC-CE). Seems to be fixed again now. 

      Noticed the CMS Antares file dump was empty since end-July - George fixed and a good one should appear today. 

      Mention again the proposed metadata tape challenge.

    • 3
      LHCb Operations Report
      Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

      Issues:

      • Failed transfers to Antares last Thursday (GGUS 1000342)
        • By accident, proxy that had been used for FTS transfers changed last week (from CN=Robot: Offline Productions to `CN=Mark Slater`).
        • Turned out Mark's DN is not present in the grid mapfile, as a result many transfers were failing (around ~60% of them).
        • Fixed on the same day
      • Low number of LHCb jobs at RAL
        • On Saturday there was a major LHCbDIRAC issues -- multiple VMs got stuck, causing the whole grid to drain
        • This was fixed, but currently we do not have enough jobs to run.

       

      News:

      • Token-based ETF tests are now passing for arc-ce-test02 in the preprod environment! See e.g. here.

       

    • 4
      ALICE Operations Report
      Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)
    • 5
      LSST Operations Report
      Speakers: Mathew Sims, Timothy Noble (Science and Technology Facilities Council STFC (GB))
    • 14:00
      Tier-1 Projects
    • 6
      Anatares Upgrade

      New EOS nodes
      Repack Progress

      Speakers: George Patargias, Thomas Byrne
    • 7
      XRootD Development
      Speakers: Alexander Rogovskiy (Rutherford Appleton Laboratory), Jyothish Thomas (STFC)

      '24 gen gateways being set up
      '23 gen still out due to CTA network issues
      streamed checksums mismatch alert set up, no alerts yet, ~1.7-2k dual checksums compared each day

    • 8
      Utilizing GPUs
      Speakers: Jyoti Prakash Biswal (Rutherford Appleton Laboratory), Thomas Birkett
    • 9
      SSD Storage Evaluation
    • 10
      Echo deployment
    • 15:00
      AOB
    • 11
      Summary of Operational Status and Issues
      Speakers: Brian Davies (Lancaster University (GB)), Darren Moore
      Weekly Report 20 August 2025.docx
      Weekly Report 20 August 2025.pdf
    • 12
      Any other Business
      Speakers: Brian Davies (Lancaster University (GB)), Darren Moore