RAL Tier1 Experiments Liaison Meeting

Wednesday 26 Jun 2024, 13:30 → 15:00 Europe/London

Access Grid (RAL R89)

14:00 → 14:01 Major Incidents Changes

14:05 → 14:06 Summary of Operational Status and Issues

Speakers: Brian Davies (Lancaster University (GB)), Darren Moore, Kieran Howlett (STFC RAL)

Weekly Report 26 June 2024.docx

Weekly Report 26 June 2024.pdf

14:10 → 14:11 Experiment Operational Issues

14:15 → 14:16 VO Liaison CMS

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

Not great for SAM tests, but the mitigation on gateways meant the weekend was green. Katy brought CMS out of drain on Monday. On Tuesday there were errors due to AAA failures after Rocky8 upgrades. AAA was fixed with service restarts. 

CMS appears to have respected the tape downtime (Monday) on webdav this time. 

For the new AAA proxy machine, Katy still to add to monitoring in Vande (also Shoveler once we have the production instance).

Discussion with CMS about IPv6 connectivity to AAA machines. 

Tape approvals are working ok with the temporary fix. 

Asked CMS to move job submission to EL9 queue only - this has not happened. I'm following up.

14:20 → 14:21 VO-Liaison ATLAS

Speakers: Brij Kishor Jashal (RAL, TIFR and IFIC), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)

ATLAS Liaison notes

14:25 → 14:26 VO Liaison LHCb

Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

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Tickets:

• ECHO issues
  • Most of the failures were caused by xrootd bug, mitigated by downgrading advertised protocol version
  • Ticket closed

 

Operational issues:

• Stratum-1 is down
  • That causes problems for other sites, not RAL-T1
• Any news on xrootd bug follow-up?

News:

• More vector read tests submitted this week
  
  • These tests were not so successfull as previous ones, some failures were present

14:30 → 14:33 VO Liaison LSST

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

14:35 → 14:36 VO Liaison APEL

Speaker: Thomas Dack

14:39 → 14:40 VO Liaison Others

Speakers: Alexander Rogovskiy (Rutherford Appleton Laboratory), Brij Kishor Jashal (RAL, TIFR and IFIC), Jyoti Prakash Biswal (Rutherford Appleton Laboratory), Katy Ellis (Science and Technology Facilities Council STFC (GB))

14:45 → 14:46 AOB

14:50 → 14:51 Any other Business

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