RAL Tier1 Experiments Liaison Meeting

Name: RAL Tier1 Experiments Liaison Meeting
Start: 2023-06-07T12:30:00+01:00
End: 2023-06-07T14:30:00+01:00
Location: RAL R89

Wednesday 7 Jun 2023, 12:30 → 14:30 Europe/London

Access Grid (RAL R89)

Access Grid

RAL R89

66811541532

Alastair Dewhurst

Join via phone

- 13:00 → 13:01
  
  Major Incidents Changes 1m
- 13:01 → 13:02
  
  Summary of Operational Status and Issues 1m
  
  Speakers: Brian Davies (Lancaster University (GB)), Darren Moore (Science and Technology Facilities Council STFC (GB)), Kieran Howlett (STFC RAL)
  
  Weekly Report 07 June 2023.docx
  
  Weekly Report 07 June 2023.pdf
- 13:02 → 13:03
  
  GGUS /RT Tickets 1m
  
  https://tinyurl.com/T1-GGUS-Open
  https://tinyurl.com/T1-GGUS-Closed
- 13:04 → 13:05
  
  Site Availability 1m
  
  https://lcgwww.gridpp.rl.ac.uk/utils/availchart/
  
  https://cms-site-readiness.web.cern.ch/cms-site-readiness/SiteReadiness/HTML/SiteReadinessReport.html#T1_UK_RAL
  
  http://hammercloud.cern.ch/hc/app/atlas/siteoverview/?site=RAL-LCG2&startTime=2020-01-29&endTime=2020-02-06&templateType=isGolden
- 13:05 → 13:06
  
  Experiment Operational Issues 1m
- 13:15 → 13:16
  
  VO Liaison CMS 1m
  
  Speaker: Katy Ellis (Science and Technology Facilities Council STFC (GB))
  
  Uneventful week for CMS. A few webdav SAM test failures over the weekend.
  We remain capped at 6k cores for network reasons. Job performance is good.
- 13:16 → 13:17
  
  VO-Liaison ATLAS 1m
  
  Speakers: James William Walder (Science and Technology Facilities Council STFC (GB)), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)
- 13:20 → 13:21
  VO Liaison LHCb 1m
  
  Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)
  Tickets:
  Memory limits issues
  ETF tests started to fail since 17th of May
  LHCb pilots were failing for ~1 day last week
  The issue is solved via limit increase (it was 4GiB, now it is 8GiB).
  Network issue (redirector setup)
  One of the issues that delays redirector deployment is a "single slash" urls problem
  LHCb uses single slash urls
  This was requested by RAL some time ago
  An attempt will be made to switch to double slash urls
  Vector read
  Correct configuration was deployed last week on lcg2268
  Only a handful of user jobs were executed on the WN since then (~30).
  Operational issues
  A lot of upload failures last Sunday
  probably due to gateway issues
  some "dark" objects were identified in LHCb pool on ECHO
- 13:25 → 13:28
  
  VO Liaison LSST 3m
  
  Speaker: Timothy John Noble (Science and Technology Facilities Council STFC (GB))
- 13:30 → 13:31
  
  VO Liaison Others 1m
- 13:31 → 13:32
  
  AOB 1m
- 13:32 → 13:33
  
  Any other Business 1m
  
  Speakers: Brian Davies (Lancaster University (GB)), Darren Moore (Science and Technology Facilities Council STFC (GB))