CTA deployment meeting

Thursday 5 Mar 2020, 14:00 → 15:30 Europe/Zurich

600/R-001 (CERN)

Michael Davis (CERN)

Operations and Monitoring

Monitoring

• We will make the Data Volume dashboards public (currently restricted to specified people but no reason to do this).
• The meter-cta dashboards will stay private, for CTA operations internal use.
• On KPIs, there are 3 graphs for CASTOR but only the first 2 are relevant for CTA. The 3rd graph, "Active Transfers", is for transfers to CASTOR disk. In EOS+CTA we use the EOS control tower for this.

CTA Service Availability

See CERN Service Portal: Service Availability Overview

In CASTOR, availability = drives up / total drives. If availability > 75% the box is green.

We need a new command like "cta-admin status" to provide this information.

In SNow, there is a global status for the service and a separate availability page with breakdown by VO. This more detailed info can include the status of each CTA EOS instance and CTA tape backend.

14:00 → 14:10 ATLAS Testing Update

ATLAS reprocessing campaign

• Status update (Julien)

ATLAS Write Stress Test (w/c 9 Mar)

• Write stress test with ATLAS
• Simultaneously run our own write/recall/delete tests on the instance
• Test dual-copy tape pools
• Tier-1 export test
• Test with XRootD 4.11.2 and EOS 4.6.9, to allow testing of TPC proxy delegation

ATLAS DAQ Test (w/c 16 Mar)

• Integration test with ATLAS online:
  • Writing without FTS
  • The "is file safely on tape" test
  • "What happens when the buffer is full" test

14:10 → 14:20 Operations and Monitoring Update

Brief updates on tasks that must be done before we go into production :

• Website cta.cern.ch (Michael)
• Tapepool summary statistics (Cédric)
• Monitoring dashboards (David)

14:20 → 14:30 ALICE

Status update on getting ready for ALICE:

• Garbage collector (Steve)
• When to start testing?