RAL Tier1 Experiments Liaison Meeting

Wednesday 13 Apr 2022, 12:30 → 13:50 Europe/London

Access Grid (RAL R89)

12:38 → 12:39 Major Incidents Changes

12:39 → 12:40 Summary of Operational Status and Issues

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

Weekly Report 13 April 2022.docx

Weekly Report 13 April 2022.pdf

12:40 → 12:41 GGUS /RT Tickets

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

12:41 → 12:42 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

12:42 → 12:43 Experiment Operational Issues

12:44 → 12:45 VO-Liaison ATLAS

Speakers: James William Walder (Science and Technology Facilities Council STFC (GB)), Dr Tim Adye (Science and Technology Facilities Council STFC (GB))

12:45 → 12:46 VO Liaison CMS

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

Jobs: I see a period between 17/03/22 and 03/04/22 which is dominated by offsite reading jobs. The efficiency of these jobs is between 50 and 75%, which seems pretty good. I'd need to do a more detailed analysis between particular campaigns running on different sites and also pulling the data from offsite to check if we are 'as good' at this as other sites, but the evidence so far is promising.

Webdav: James W made some code changes and rolled them out. From Sunday until now the SAM tests are green, which is good, although the traffic with Echo as source has been relatively light. Today's traffic looks higher so could be a better test. 

Antares: We may have understood the problem where files are successfully transferred to Antares, and even written to tape, but not acknowledged by Rucio. I previously wondered if this was a problem of communication between FTS and Rucio, since transfers were appearing in FTS monitoring but not Rucio (neither successful nor failed). But George tells me that an example file we investigated had written to tape on the day the request was submitted. There is then supposed to be a signal to tell EOS that this has happened...but he saw no evidence of this. So there is now an RT ticket for this. (Rucio will not acknowledge a completed transfer until the file confirms it is physically written to tape, since CMS started using the 'check on tape' functionality.)

12:50 → 12:51 VO Liaison LHCb

Speaker: Raja Nandakumar (Science and Technology Facilities Council STFC (GB))

12:55 → 12:58 VO Liaison LSST

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

13:00 → 13:01 VO Liaison Others

13:05 → 13:06 Experiment Planning

13:10 → 13:11 Euclid

13:15 → 13:16 SKA

13:20 → 13:30 Dune/protoDune

13:30 → 13:31 AOB

13:35 → 13:36 Any other Business

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