RAL Tier1 Experiments Liaison Meeting

Wednesday 14 Feb 2024, 13:30 → 15:00 Europe/London

Access Grid (RAL R89)

14:00 → 14:01 Major Incidents Changes

14:01 → 14:02 Summary of Operational Status and Issues

Speakers: Brian Davies (Lancaster University (GB)), Darren Moore, Kieran Howlett (STFC RAL)

Weekly Report 14 February 2024.docx

Weekly Report 14 February 2024.pdf

14:02 → 14:03 GGUS /RT Tickets

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

14:04 → 14:05 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

14:05 → 14:06 Experiment Operational Issues

14:15 → 14:16 VO Liaison CMS

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

DC24 has started! CMS/RAL rates are a bit up and down according to FTS monitoring but in general we are hitting the expected rates so far.

OPN is still down. LHCONE is showing zero traffic IN but we think this is monitoring problem.

SAM tests weren't running over the weekend. RAL was lucky that we remained green. Jobs continued but some periods of high failure rate and low efficiency (several days from 9th Feb). Possibly due to OPN being missing.

14:16 → 14:17 VO-Liaison ATLAS

Speakers: James William Walder (Science and Technology Facilities Council STFC (GB)), Jyoti Prakash Biswal (Rutherford Appleton Laboratory)

RAL_drop.png

• DC24 and RAL:
  • Live notes.
  • FTS monitoring link.
  • RAL had a massive drop (yesterday around 15:00 hrs) that is not understood -- something wrong with injection (plot attached)? 
  • RAL without cancelled jobs has mainly token errors -- not clear if it is correlated with the drops in transfers which was quite dramatic.
  • Off the tokens now. 
    
  • In general, the DC24 traffic for ATLAS went down because of the volatile data at the source and the system deleted it.

 

• RAL-LCG2_MCORE is back!

 

• Update of RAL storage pledge by 2 PB (Twiki has the procedure).
  
  • Could not make the change due to several permission issues!
  • Was hoping it to be taken care of by the Data Services team -- not done yet.
    

 

• switcher changes and ALMA9 migration:
  • CSOPS-2201
  • CSOPS-2204

 

• Status of Antares to Echo data transfers that started on Monday? 
  

 

14:20 → 14:21 VO Liaison LHCb

Speaker: Alexander Rogovskiy (Rutherford Appleton Laboratory)

antares_rate.png

echo_rate.png

DC24:

• Good efficiency for both RAL links (T0 -> ECHO and ECHO ->Antares)
• T0 -> ECHO link has lower throughput than expected
  
  • around 2.5GiB/s, while 4 is the desired value
• Second link is much faster, but starving sometimes

 

14:25 → 14:28 VO Liaison LSST

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

14:30 → 14:31 VO Liaison Others

14:31 → 14:32 AOB

14:32 → 14:33 Any other Business

Speakers: Brian Davies (Lancaster University (GB)), Darren Moore