Week of 210628

WLCG Operations Call details

• At CERN the meeting room is 513-R-068.

• For remote participation we use Zoom: https://cern.zoom.us/j/99591482961
  • The pass code is provided on the wlcg-operations list.
  • You can contact the wlcg-ops-coord-chairpeople list (at cern.ch) if you do not manage to subscribe.

General Information

• The purpose of the meeting is:
  • to report significant operational issues (i.e. issues which can or did degrade experiment or site operations) which are ongoing or were resolved after the previous meeting;
  • to announce or schedule interventions at Tier-1 sites;
  • to inform about recent or upcoming changes in the experiment activities or systems having a visible impact on sites;
  • to provide important news about the middleware;
  • to communicate any other information considered interesting for WLCG operations.
• The meeting should run from 15:00 Geneva time until 15:20, exceptionally to 15:30.
• The SCOD rota for the next few weeks is at ScodRota
• Whenever a particular topic needs to be discussed at the operations meeting requiring information from sites or experiments, it is highly recommended to announce it by email to wlcg-scod@cernSPAMNOTNOSPAMPLEASE.ch to allow the SCOD to make sure that the relevant parties have the time to collect the required information, or invite the right people at the meeting.

Best practices for scheduled downtimes

• Best practices for scheduled downtimes

Monday

Attendance:

• remote: Alberto (MONIT), Andrew (NL-T1), Andrew (TRIUMF), Borja (Chair, MONIT), Chien-De (ASGC), Concezio (LHCb), David (FNAL), David (IN2P3), Doug (BNL), Jarka (Computing), Jose Enrique (ATLAS), Maarten (ALICE), Mihai (Storage), Pinja (Security)

Experiments round table:

• ATLAS reports ( raw view) -
  • NTR

• CMS reports ( raw view) -
  • CMS has a Computing & Offline Management workshop this Monday and Tuesday - Nobody available to join the call
  • Nothing to report

• ALICE
  • NTR

• LHCb reports ( raw view) -
  • running at ~120k jobs
  • P8 --> EOS / CTA transfers at nominal Run3 rates successfully tested last Tuesday
    • EOS accounting had some troubles GGUS:152707, space was exhausted and this impacted operations (transfers to CERN)

Sites / Services round table:

• ASGC: NTR
• BNL: NTR
• CNAF: NTR
• EGI: NC
• FNAL: NTR
• IN2P3: NTR
• JINR: NC
• KISTI: NC
• KIT: NC
• NDGF: NTR (Won't be able to participate)
• NL-T1: Nikhef: The source of the nfs issues reported last week was traced to a misconfiguration of our arc-ce. The configuration that set the work directories of batch jobs to a directory on a partition local to the batch node was not retained after the arc-ce was rebooted. This caused new batch jobs to use directories on our nfs server as the work directories for jobs. This overloaded the nfs server. The misconfiguration has been corrected.
• NRC-KI: NC
• OSG: NC
• PIC: NC
• RAL: NC
• TRIUMF: Updating ce's to ARC 6.12. Outage on Tuesday June 29 17:00-1900HRS UTC. GOCDB: https://goc.egi.eu/portal/index.php?Page_Type=Downtime&id=30843

• CERN computing services: NTR
• CERN storage services: NTR
• CERN databases: NC
• GGUS: NTR
• Monitoring:
  • OTG:0064696 Removal of MONIT Kafka plain text listener on the 14th of July
• Middleware:
  • Reminder: please upgrade your ARC CEs to 6.12.0 for accounting and privacy reasons
• Networks: NTR
• Security: NTR

AOB: