RAL Tier1 Experiments Liaison Meeting

Wednesday 7 Oct 2020, 13:30 → 14:30 Europe/London

Access Grid (RAL R89)

13:38 → 13:39 Major Incidents Changes

13:39 → 13:40 Summary of Operational Status and Issues

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

RT1EL-20201007.docx

RT1EL-20201007.pdf

13:40 → 13:41 GGUS /RT Tickets

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

13:41 → 13:42 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

13:42 → 13:43 Experiment Operational Issues

13:44 → 13:45 VO-Liaison ATLAS

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

13:46 → 13:47 VO Liaison CMS

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

13:48 → 13:49 VO Liaison LHCb

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

LHCb

1. ECHO streaming issue
   • Waiting for fix on vector reads
   • Test jobs running all over the farm currently
     • No longer running only on dedicated LHCb test WNs
     • CEs are not in stable situation yet in ARC6
     • Waiting for this to be resolved to reduce confusion
     • Once resolved get back to understanding the less frequent sources of errors
2. Concurrent job running rate went down to ~5K from 25 September
   • Was ~9K - 10K previously
   • Has recovered to ~7K now
   • Possibly a glitch in publishing which caused LHCb to reduce job submission rate temporarily around the 25 September
   • Wait and watch for now
3. One user not able to access files at RAL
   • Authentication rejected by ECHO
   • Not in "banned" list
   • Under investigation

DUNE

1. Moved to using CRIC for ETF tests
   • RAL CEs are fine
   • Updates to CRIC will automatically propagate to ETF tests for DUNE in future
2. Regularly running a few hundred jobs in the last week
   • Nowhere near request but still ...

13:52 → 13:53 VO Liaison Others

13:53 → 13:54 Experiment Planning

13:54 → 13:55 Dune/protoDune

13:55 → 13:56 Euclid

13:56 → 13:57 SKA

13:57 → 13:58 AOB

13:58 → 13:59 Any other Business

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