CTA Dev Meeting

513/R-068 (CERN)



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Michael Davis (CERN)
    • 3:00 PM 3:10 PM
      CTA Release Workflow 10m
    • 3:10 PM 3:20 PM
      CTA Release Roadmap 10m

      See CTA Release Roadmap

      Release 4.8.3-1

      • Milestones link
      • Release date: 18 Jan
      • Pre-prod deployment date: 18 Jan
      • Prod deployment date: 19 Jan
      • Added counters for profiling high-rate DB queries (MR link)

      Release 4.8.4-1

      • Milestones link
      • Release date: 23 Jan
      • Pre-prod deployment date: 25 Jan
      • Prod deployment date: 26 Jan
      • Will include only the catalogue DB query optimisations resulting from the 4.8.3-1 analysis

      Release 4.8.5-1

      • Milestones link
      • Release date: TBD
      • Pre-prod deployment date: TBD
      • Prod deployment date: TBD
      • This will be a large release, with many new features/fixes added since December.

      Public Release

      • Latest version available on public repo: v4.7.14-1, v5.7.14-1
      • Release 4.8.5-1, should be done next week.
      • Before, we need to merge:
        • Changes from 4.8.4-1 (including removal of counters).
        • Usage of new CTA-catalogue schema
      • Next public release can be done on 4.8.5-1, as long as it performs well in our production environment.
    • 3:20 PM 3:30 PM
      CTA dev topics 10m

      Add new physical tape library table to the CTA catalogue

      • For details check #276
      • Do we enforce a normalisation form to the CTA catalogue schema?

      Tape server querying DB at very high rate

      • Improvements to DB queries done by the tape server.
      • Tape server querying DB at very high rate: #155
      • Fix 1 worked: #275
      • Fix 2 seems not to have worked: #274

      "Needs discussion" topics

      "Dev issue needed" topics

      Add new physical tape library table to the CTA catalogue

      • For details check #276
      • We will use 3NF in most cases, but for this specific table it was decided that it is unnecessary.

      Tape server querying DB at very high rate

      • It seems that the changes are having the expected results (significant reduction in number of DB queries).
      • In addition, this seems to have reduced the average duration of fetchMountInfo(...) from 8 to 2 seconds.
      • On monday a new analysis will be done to confirm these results.


      • We must develop the counter logging system, ASAP. This can be added as part of the stress tests and monitoring to detect important variations in performance.
      • Add a dCatche stick topic to the CTA dev planning


    • 3:30 PM 3:40 PM
      CTA dev board review 10m


      • Look at the active issues in our CTA dev board.
      • Decide if they should be kept, removed, reassigned, prioritised, etc.

      Review unlabelled issues

      • Unlabelled issues list: link

      Review "In progress" issues

      • Full CTA board: link

      Review specific topic

    • 3:40 PM 3:50 PM
      AOB 10m


      • Room 513/R-068 is booked every week, until the EOY, for the CTA dev meeting.