Week of 201019

WLCG Operations Call details

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

• For remote participation we use the Vidyo system. Instructions can be found here.

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:

• local:
• remote: Miro (Chair, DB), Darren (NDGF), Maarten (ALICE), Pavlo (ATLAS) , Pedro (Monitoring), Vladimir (LHCb), Marian (Networks), Alberto (Monitoring), Julia (WLCG), Andrew (TRIUMF), Christoph (CMS), Dave (FNAL)

Experiments round table:

• ATLAS reports ( raw view)
  • UKI-NORTHGRID-LANCS-HEP: storage issues ATLDDMOPS-5539
  • INFN-MILANO-ATLASC: GGUS:149031, transfer issues
  • UNIBE-LHEP: GGUS:147937, transfer issues

• CMS reports ( raw view) -
  • CMS-R Oracle issue on weekend (10th/11th) let to submission issues with CRAB
    • Correlation was only fully confirmed after WLCG call
  • Opened a bunch of (low priority) tickets for various EU sites with request to restarted xrootd related services
    • Needed to activate reporting of monitoring data to a new host behind DNS alias

• ALICE -
  • NTR

• LHCb reports ( raw view) -
  • Activity:
    • MC and WG productions; User jobs.

Sites / Services round table:

• ASGC: NC
• BNL: NTR
• CNAF: Tomorrow there is a scheduled downtime to upgrade storm-fe-atlas (GOCDB link)
• EGI: NC
• FNAL: NTR
• IN2P3: NC
• JINR: NC
• KISTI: NC
• KIT: NTR
• NDGF: NTR
• NL-T1: NTR
• NRC-KI: NC
• OSG: NC
• PIC: NTR
• RAL: NTR
• TRIUMF: NTR

• CERN computing services: NC
• CERN storage services: NC
• CERN databases: NTR
• GGUS: NTR
• Monitoring:
  • OTG:0059806: ETF ATLAS and CMS production instances will be updated to the latest ETF release tomorrow
  • Request to restart XRootD servers in EU sites
    • XRootd servers reporting to atlas-fax-eu-collector.cern.ch:9330 (for ATLAS) and cms-aaa-eu-collector.cern.ch:9330 (for CMS)
    • Due to the migration of old Gled collectors to new VMs (host hypervisors reached end of life)
    • Alias already swapped (1 week ago) but it is not enough. XRootD connection is sticky and needs a restart.
    • List of nodes that require restart: atlas, cms
  • Final reports for the September availability sent around
• MW Officer: NC
• Networks: NTR
• Security: NTR

AOB: