RAL Tier1 Experiments Liaison Meeting

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

Access Grid (RAL R89)

13:30 → 13:34 Site Operations

13:34 → 13:35 Experiment Operational Issues

13:35 → 13:40 ATLAS Operations Report

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

ADCSwitcher_Brij (1).pdf

Brij ATLAS notes

13:40 → 13:45 CMS Operations Report

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

Katy is at the FTS/XRootd workshop.

SAM test failures on the AAA machines. This is understood, as config still contained mon machines retired by Jyothish. 

Otherwise smooth running. 

Katy is at CMS O&C week next week. 

13:45 → 13:50 LHCb Operations Report

Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

lhcb_token_transfers_15102025.png

Squid upgrade.pdf

Squid upgrade.pptx

Operational issues:

• Dirac problems on Saturday, resulting in a spike of rescheduled jobs
  • Not our fault
• Problems with downloads from ECHO to 3 RAL WNs during the weekend
  • 3 WNs were misconfigured after xrootd update, fixed on Monday morning

 

News:

• LHCb is using tokens for production transfers now!
  • All FTS transfers between disk SEs at Tier-1 sites, Tier-0 sites and most of the Tier-2 sites are now token-based
  • No issues at RAL so far

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))

14:00 → 14:01 Tier-1 Projects

14:02 → 14:07 Anatares Upgrade

Speakers: George Patargias, Thomas Byrne

14:08 → 14:13 XRootD Development

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

14:14 → 14:19 Utilizing GPUs

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

14:20 → 14:25 SSD Storage Evaluation

14:25 → 14:26 AOB

14:27 → 14:36 Summary of Operational Status and Issues

Speakers: Brian Davies (Science and Technology Facilities Council STFC (GB)), Darren Moore

Weekly Report 15 October 2025.docx

Weekly Report 15 October 2025.pdf

14:45 → 14:50 Any other Business

Speakers: Brian Davies (Science and Technology Facilities Council STFC (GB)), Darren Moore