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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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    • 13:30 → 13:31
      Experiment Operational Issues 1m
    • 13:35 → 13:40
      ATLAS Operations Report 5m
      Speakers: Brij Kishor Jashal (Rutherford Appelton Laboratory), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)
      ATLAS liason meeting notes Brij
    • 13:40 → 13:45
      CMS Operations Report 5m
      Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))

      SAM tests: a blip today on CEs and AAA during the network intervention this morning. 

      On Monday failures for Webdav on Echo due to Jyothish's changes to help regularise the naming of the site in Shoveler monitoring. He fixed it as soon as it was spotted. 

      Great job performance this week. 

      CMS are requesting an advance on next year's tape pledge. 

    • 13:45 → 13:50
      LHCb Operations Report 5m
      Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

      Operational issues:

      • LHCb job pressure was unstable throughout the week
        • Lack of MC productions, lack of jobs as a result
        • There is some improvement since yesterday
      • Echo transfer issues last Monday
        • Problems with macaroon rejection after xrootd sitename change
        • Small impact on LHCb transfers, fixed within an hour since discovery
      • IPv4 routing issues from LHCb ETF machines to 23 ECHO gateways (GGUS:1000451)
        • It is impossible to establish a connection to those gateways via IPv4 from `etf-0[56].cern.ch` machines
          • on connection establishment ACK packet does not reach the gateways
          • Seems to be routing issue, which is now tracked in JIRA (INFRA-483)
          • To mitigate the problem, affected gateways were removed from production
      • A few spikes of failed WGProduction jobs last week
        • The usual issue -- buggy xrootd client
    • 13:50 → 13:55
      ALICE Operations Report 5m
      Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)
    • 13:55 → 14:00
      LSST Operations Report 5m
      Speakers: Mathew Sims, Timothy Noble (Science and Technology Facilities Council STFC (GB))
      • Data from all 4 Data Facilities has been processed, and returned according to the pipeline test for 2 datasets - verification is ongoing to ensure all sites produced the same results
      • CCMS1 complete and verified at RAL
      • New dataset to be sent to RAL soon - awaiting details
      •  
    • 14:00 → 14:01
      Tier-1 Projects 1m
    • 14:15 → 14:25
      Anatares Upgrade 10m

      New EOS nodes
      Repack Progress

      Speakers: George Patargias, Thomas Byrne
    • 14:25 → 14:35
      XRootD Development 10m
      Speakers: Alexander Rogovskiy (Rutherford Appleton Laboratory), Jyothish Thomas (STFC)

      '23 gen out of prod again - OPN routing to etf hosts having issues
      host certs for the '24 incoming
      sitename reconfigured to RAL-LCG2
      streamed checksum validation has made progress - mismatches now understood. 

    • 14:35 → 14:45
      Utilizing GPUs 10m
      Speakers: Jyoti Prakash Biswal (Rutherford Appleton Laboratory), Thomas Birkett
    • 14:45 → 14:50
      SSD Storage Evaluation 5m
    • 14:50 → 14:55
      Echo deployment 5m
    • 15:00 → 15:01
      AOB 1m
    • 15:01 → 15:10
      Summary of Operational Status and Issues 9m
      Speakers: Brian Davies (Lancaster University (GB)), Darren Moore
      Weekly Report 03 September 2025.docx
      Weekly Report 03 September 2025.pdf
    • 15:10 → 15:15
      Any other Business 5m
      Speakers: Brian Davies (Lancaster University (GB)), Darren Moore