RAL Tier1 Experiments Liaison Meeting

Wednesday 3 Feb 2021, 13:30 → 14:30 Europe/London

Access Grid (RAL R89)

Please attend via the following Zoom meeting:

https://ukri.zoom.us/j/98562731547?pwd=UU9Wb2xCL05tWmROT1h6SUlWdUJ3dz09

13:38 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))

RT1EL-20210302.docx

RT1EL-20210302.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

13:42 Experiment Operational Issues

4 VO-Liaison ATLAS

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

NTR

5 VO Liaison CMS

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

I have been trying to fix the AAA service which has been causing SAM tests both directly for AAA and indirectly on the WN (xrootd-access) to fail over the last week or more. Also RALPP and other T2s in the UK were affected at times. I found the redirector based at RAL was full of logs. Chris and I cleaned up and restarted services. I also changed the throttling value on gw10 (not gw11) to try to allow more traffic, and hence give the tests a better chance of reaching our AAA. Restarts of all services from the proxies to the redirector (again) were then required. As of now, things are looking better, although we do see periods of passing tests, so it could just be that. I see no effect in the Vande monitoring of increased throughput from the changed throttling, so I don't know if that config is effective.

 

6 VO Liaison LHCb

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

LHCb:

1. Low number of running jobs at RAL
   • Jose aware and looking at it
2. Streaming issue from ECHO ongoing
   • Development ongoing (? no news)
   • Looking at mitigation with Tom

DUNE

1. Normal operations

7 VO Liaison Others

13:53 Experiment Planning

8 Dune/protoDune

9 Euclid

10 SKA

13:57 AOB

11 Any other Business

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