RAL Tier1 Experiments Liaison Meeting

Wednesday 18 Aug 2021, 13:10 → 14:30 Europe/London

Access Grid (RAL R89)

13:18 → 13:19 Major Incidents Changes

13:19 → 13:20 Summary of Operational Status and Issues

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

Weekly Report 18 August 2021 .docx

Weekly Report 18 August 2021 .pdf

13:20 → 13:21 GGUS /RT Tickets

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

13:21 → 13:22 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

13:22 → 13:23 Experiment Operational Issues

13:24 → 13:25 VO-Liaison ATLAS

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

13:25 → 13:26 VO Liaison CMS

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

13:30 → 13:31 VO Liaison LHCb

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

LHCb:

 

Tickets

 

https://ggus.eu/index.php?mode=ticket_info&ticket_id=152009

https://ggus.eu/index.php?mode=ticket_info&ticket_id=153050

Title : FTS3 transfers Failed (RAL => CERN) RAL-LCG2

Issue : Data corruption at RAL again. Cause of corruption understood as a race condition, but underlying cause still unknown.

Status : On hold. Wait for end of year

 

https://ggus.eu/index.php?mode=ticket_info&ticket_id=150653

Title : FTS error: libX509SciTokensIssuer.so ...    

Issue : RAL FTS does not support macaroons. FTS upgrade needed at RAL.

Resolution : Upgraded - to be tested by LHCb when Brian gets some information about authentication from FTS developers

Status : Waiting for upgrade

 

https://ggus.eu/index.php?mode=ticket_info&ticket_id=142350

Title : Proble accessing some LHCb files at RAL 

Issue : xrootd vector reads from CEPH (ECHO@RAL) not properly implemented.

Status : Waiting for fix.

 

https://ggus.eu/index.php?mode=ticket_info&ticket_id=152927

Title : Singularity for LHCb at RAL 

Issue : Singularity does not start at RAL as we run jobs within docker container.

Status : Fix is to run docker with additional security options which are available only from docker v19.03. RAL currently runs docker v18.03. To be solved in the next month after various batch farm upgrades are finished.

 

Other stuff

 

No specific issue seen regarding job failures w.r.t. the docker version on the WNs

Downtime was incorrectly scheduled to end on Sunday - caused a ticket from LHCb.

 

DUNE:

 

Looking forward to http(s) access for ECHO (xrootd5)

Waiting for CTA to go into production at RAL for testing tape access.

 

13:35 → 13:38 VO Liaison LSST

Speaker: Joshua Kitenge

13:40 → 13:41 VO Liaison Others

13:45 → 13:46 Experiment Planning

13:50 → 13:51 Euclid

13:55 → 13:56 SKA

14:00 → 14:10 Dune/protoDune

14:10 → 14:11 AOB

14:15 → 14:16 Any other Business

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