RAL Tier1 Experiments Liaison Meeting

Name: RAL Tier1 Experiments Liaison Meeting
Start: 2024-05-01T13:30:00+01:00
End: 2024-05-01T15:00:00+01:00
Location: RAL R89

Wednesday 1 May 2024, 13:30 → 15:00 Europe/London

Access Grid (RAL R89)

Access Grid

RAL R89

66811541532

Alastair Dewhurst

Join via phone

- 14:00
  
  Major Incidents Changes
- 1
  
  Summary of Operational Status and Issues
  
  Speakers: Brian Davies (Lancaster University (GB)), Darren Moore, Kieran Howlett (STFC RAL)
  
  Weekly Report 01 May 2024.docx
  
  Weekly Report 01 May 2024.pdf
- 14:10
  
  Experiment Operational Issues
- 2
  
  VO Liaison CMS
  
  Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))
  
  Gsiftp now completely removed from CMS activities including WN uploads.
  
  Tape REST API is in production and we see some successful davs transfers already. Katy is monitoring.
  
  Antares updated to CTA 5 - no issues observed.
  
  Cap removed on 12k CMS cores running simultaneously - however I have not seen the number go above 12k in Vande.
  
  Concerning the DUNE usage of Echo - they acknowledge they went over pledge and are investigating (behaviour in Rucio, dark data and so on).
- 3
  
  VO-Liaison ATLAS
  
  Speakers: Dr Brij Kishor Jashal (RAL, TIFR and IFIC), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)
  
  ATLAS T1 RAL_LCG2 notes
  
  https://codimd.web.cern.ch/Az2O8j5tRuGbgTD_us8UWQ#
- 4
  
  VO Liaison Others
- 5
  VO Liaison LHCb
  
  Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)
  LHCb:
  
  First 2024 data arrived to RAL
  
  LHCb submitted huge WGProduction last week, it overloaded ECHO and resulted in many vector read failures
  
  This indicates that chanes are indeed necessary
  
  No prefetch was rolled-out to 2021 gen last Friday
  
  In the long term we should aim for proxy removal, in my opinion
  
  Checksums stopped working on 3 WNs from the preprod farm
  
  Due to tests
  
  Xrootd bug follow-up
  
  Lists of affected files created
  
  ALICE:
  
  Free space values in SRR does not match CRIC, needs correction (ticket CS-147)
  
  Do we have working xrootd space reporting?
- 6
  VO Liaison LSST
  
  Speaker: Timothy John Noble (Science and Technology Facilities Council STFC (GB))
  LSST jobs running on batchfarm well
  
  new job type added to utilise the Butler Metadata hosted at RAL
  
  Currently failing due to configuration error but cannot correct until X509 user cert renewed
  
  LSST Rucio currently in scaled back operations due to DB issues with load
  
  psycopg-binary for the client currently thought to be the issue
  
  I have suggested it is more of a DB issue as I have seen the error on my instance when close to its maximum connections allowed
- 7
  
  VO Liaison APEL
  
  Speaker: Thomas Dack
- 14:45
  
  AOB
- 8
  
  Any other Business
  
  Speakers: Brian Davies (Lancaster University (GB)), Darren Moore