RAL Tier1 Experiments Liaison Meeting

Wednesday 29 Jul 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-20200729.docx

RT1EL-20200729.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))

RAL may wish to consider updating their FTS to latest release:
https://its.cern.ch/jira/browse/FTS-1660
(BNL GGUS: https://ggus.eu/index.php?mode=ticket_info&ticket_id=148076) 
(not relevant for ATLAS, but if the information not otherwise propagated).

 

13:46 → 13:47 VO Liaison CMS

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

I am chasing a problem with the AAA service. I hear that Raul at Brunel is also seeing problems. I can see that IPv4 is performing at a lower rate than IPv6.

13:48 → 13:49 VO Liaison LHCb

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

LHCb:

1. Jobs running mostly fine at RAL
2. ECHO streaming issue :
   • Request from xrootd developers last Thursday to change some streaming block sizes on the xrootd client (Worker Node) side
     • Better compatibility with CEPH defaults
   • Struggling with different Worker Node issues since last Friday
     • Last Friday changes to WNs did not get picked up (overwritten by quattor)
     • Since Monday morning (known) issue with systemd vs failing xrootd containers, hopefully fixed today

DUNE:

1. No jobs in the current pipeline. Waiting for new simulation to be readied
2. Moved to using sl7 queue at RAL last Wednesday (22 July 2020)

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))