RAL Tier1 Experiments Liaison Meeting

Wednesday 6 Aug 2025, 13:30 → 15:50 Europe/London

Access Grid (RAL R89)

13:30 → 13:31 Experiment Operational Issues

13:35 → 13:40 ATLAS Operations Report

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

Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))

Very little interesting to report from operationss.

A few token tests for ARC-CEs failing intermittently (one or two per day per CE). The issue is that the test is not running as it is HELD:
HoldReason = "File stage-in failed: Transfer of wnlogs.tgz failed: HTTP response 500"\r

Some low-efficiency CMS jobs in the system recently, has hit RAL particularly, giving lower than usual CPU efficiency. 

13:45 → 13:50 LHCb Operations Report

Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

jobs.png

transfers_from.png

transfers_to.png

Operational issues:

• Failed transfers from Beijing to Antares (GGUS 1000160)
  • The issue disappeared a few days after the SHA-1 signed certs/crls were allowed on Antares
  • Ticket can be closed
• There were a few spikes of failed WGProduction jobs last week, due to faulty production
  
  • Some of the productions used buggy xrootd client (incompatible with xrootd servers), some had other "user" errors.

13:50 → 13:55 ALICE Operations Report

Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

13:55 → 14:00 LSST Operations Report

Speakers: Mathew Sims, Timothy Noble (Science and Technology Facilities Council STFC (GB))

• IngestD now tested, itterated on and now demonstrated to be running successfully
  • Documented setup and pushed changes to the github repo to act as template for future deployments
• CCMS1 data ready to go
• Running some jobs as part of the 4 site by 2 data set challenge for LSST, and no errors have been raise so far

14:00 → 14:01 Tier-1 Projects

14:15 → 14:25 Anatares Upgrade

New EOS nodes
Repack Progress

Speakers: George Patargias, Thomas Byrne

14:25 → 14:35 XRootD Development

Speakers: Alexander Rogovskiy (Rutherford Appleton Laboratory), Jyothish Thomas (STFC)

14:35 → 14:45 Utilizing GPUs

Speakers: Jyoti Prakash Biswal (Rutherford Appleton Laboratory), Thomas Birkett

14:45 → 14:50 SSD Storage Evaluation

14:50 → 14:55 Echo deployment

15:00 → 15:01 AOB

15:01 → 15:10 Summary of Operational Status and Issues

Speakers: Brian Davies (Lancaster University (GB)), Darren Moore

15:10 → 15:15 Any other Business

Speakers: Brian Davies (Lancaster University (GB)), Darren Moore