RAL Tier1 Experiments Liaison Meeting

Wednesday 12 Feb 2025, 13:30 → 15:50 Europe/London

Access Grid (RAL R89)

13:30 → 13:31 Experiment Operational Issues

13:35 → 13:45 VO-Liaison ATLAS

Speakers: Brij Kishor Jashal (Rutherford appelton laboratory), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)

ATLAS liason meeting notes Brij

13:45 → 13:55 VO Liaison CMS

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

Katy is at CERN and won't be able to attend the liaison meeting.

Not much to report. CMS took a lot of slots when LHCb had some issues at CERN. Last week's errors on the AAA machines haven't been seen since Jyothish did an XRootD upgrade as well as implementing priority scheduling. Job performance is good. Tom Birkett reported a spike in failures but this did not appear in CMS monitoring. We think CMS removed the jobs (although they also did not appear in Cancelled jobs).

Mini-DC for Echo in week of 3rd March: A meeting is scheduled for later today between me, Alessandra and Alex. The list of tests is already discussed, but we will agree on a draft timetable for that week, rates to start with, etc. 

13:55 → 14:05 VO Liaison LHCb

Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

News:

• Writable WNs sandbox is being deployed
  • LHCb configuration amendment is planned for tomorrow morning (allowing writes for 2018 and 2020 gens)
    • This is because we have to wait for full pilot turnaround to make sure that the jobs have proper DNS records in their local `/etc/hosts`
• The number of running LHCb jobs is a bit low, slowly recovering from the drain on Sunday.
• ETF tests for xrootd.echo.stfc.ac.uk is in Warning state since the redirector rearrangment
  • Lack of PTR records in the reverse DNS zone for manager addresses
• Token tests for ARC CEs are now in preprod
  • Not used for A&R calculation or propagated to any dashboards

14:10 → 14:20 VO Liaison ALICE

Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

Problems:

• Alice people can not access RAL vo-box (GGUS 682088)
  • Misconfiguration, fixed now, ticket closed

14:20 → 14:30 VO Liaison LSST

Speaker: Timothy John Noble (Science and Technology Facilities Council STFC (GB))

14:30 → 14:40 VO Liaison APEL

Speaker: Thomas Dack

14:45 → 14:55 WP-D - GPU, Data Management, Other

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

15:00 → 15:01 Major Incidents Changes

15:05 → 15:15 Summary of Operational Status and Issues

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

Weekly Report 12 February 2025.docx

Weekly Report 12 February 2025.pdf

15:20 → 15:21 AOB

15:22 → 15:32 Any other Business

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