CTA deployment meeting

Contribution List

16. ATLAS recall exercise and next tests

06/02/2020, 14:00

• Julien e-mailed round a graph from DDM team about the 2018 data recall. BNL was first to finish but we reached the fastest recall speed.
• Next week is ATLAS Software Week.
• Recall exercise will resume the week after (17 Feb): reprocessing of 2017 data.

Action points to clarify

• Make a new release of CTA (Monday OK?) This will add new features including:
  • cta-admin...

25. Monitoring Status Update

06/02/2020, 14:15

• Cedric is working on the tape summary feature and long-term logging of data in CTA
• David will present on consolidation of monitoring dashboards

21. Next milestones

06/02/2020, 14:30

• 31 January milestone
  • Review of outstanding items and close the milestone
  • Review of issues raised by Julien
• CTA v1.0-4 next week to complete recall test
• Write Stress Test -> CTA v1.1 (24 February)
  • Backpressure
  • Do we need multi-hop for this? To be checked with Cédric Serfon.
  • XRootD v4.11.2 for TPC proxy delegation transfers
• Integration test with...

27. Technical discussion about Backpressure

06/02/2020, 14:45

We need to take a look at all of the backpressure/rate-limiting mechanisms in play in all of the system components (Rucio/FTS/XRootD/EOS/CTA) and come up with a plan as to how we will implement a workable backpressure mechanism for retrieval.

• Cédric will present the backpressure mechanism as it is implemented in the tapeserver.
• Clarify what problems have already been solved and which...

29. Other unresolved problems

06/02/2020, 15:15

List issues that still need to be resolved (not for discussion today)

• Zero-length files

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