RAL Tier1 Experiments Liaison Meeting

Wednesday 1 Apr 2020, 13:30 → 14:00 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))

report-t1l.docx

report-t1l.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))

New Accounting period starts:
  CPU (HEP-SPEC06) :   132,125 -> 156,436
  Disk (Tbytes)   :               11,000 ->   13,024
  Tape (Tbytes)   :               27,625 ->   32,708

Data Carousel: 
  Data15 started yesterday (9 datasets); already >50% done

GU queues:
New queues created; will start to disable the old queues; 

 

GGUS: 146360: Deletion failures from echo: 
e.g.:
   gsiftp://gridftp.echo.stfc.ac.uk:2811/atlas:datadisk/rucio/data17_13TeV/e1/71/data17_13TeV.00339387.physics_Main.daq.RAW._lb0525._SFO-6._0002.data
  The deletion error rate peaked at about 10% at 1600, 31 March (with ~70TB/h deletion volume), and ~ 12GB/s deletion throughput.
Now improved to near 100% efficiency, with ~ 2-3TB/h deletion volume; ~1GB/s throughput.

Can be related to the data carousel processing model.
No monitoring  seems to capture deletion information from Vande / kibana; needed?
Do we know where the 'bottleneck' appears?

'Lifetime model' data deletion set for next week (suspect a smaller effect).

 

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))

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))