RAL Tier1 Experiments Liaison Meeting

Wednesday 28 Jun 2023, 12:30 → 14:30 Europe/London

Access Grid (RAL R89)

13:00 Major Incidents Changes

1 Summary of Operational Status and Issues

Speakers: Brian Davies (Lancaster University (GB)), Darren Moore (Science and Technology Facilities Council STFC (GB)), Kieran Howlett (STFC RAL)

Weekly Report 28 June 2023.docx

Weekly Report 28 June 2023.pdf

2 GGUS /RT Tickets

https://tinyurl.com/T1-GGUS-Open
https://tinyurl.com/T1-GGUS-Closed

3 Site Availability

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 Experiment Operational Issues

4 VO Liaison CMS

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

Katy is investigating tape transfers that failed earlier in the week. Suspects that it's related to data trying to arrive without asking for 'approval' in Rucio - hence not having tape family assigned. Nevertheless, Mihai wanted to get feedback from the xrootd developers on the error message seen. There were also a couple of other curiosities Katy followed up with CMS DM.  (e.g. was 'cancel-requests' functionality broken? - answer: no)

James W did a test on one of the AAA proxies (ceph-gw10) to see if the token tests would 'just work' since he already has a solution for davs. However, it seems that the xrootd solution is different to the davs solution and further work is needed to cater for tokens with an xrootd endpoint. Katy had the xrootd test suite added to the test GW ceph-dev-gw4 and JW will look at making a solution when he finds time.

CMS saw a slight drop in running cores this morning due to the WN patching campaign, but appear to be back to full strength again now. 

5 VO-Liaison ATLAS

Speakers: James William Walder (Science and Technology Facilities Council STFC (GB)), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)

6 VO Liaison LHCb

Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

slides.pdf

Tickets:

• Vector read:
  • See slides attached
• host certificate on the vobox
  • Still with the security team
• Job memory  limits
  • Batch admins are investigating, it might be that the lack of memory on the old WNs is the cause
     

News:

• LHCb is using arex at RAL for job submission now

7 VO Liaison LSST

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

8 VO Liaison Others

13:31 AOB

9 Any other Business

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