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\uD83D\uDC65 Participants
Lancs: Matt, Gerard
Glasgow:
Apologies:
CC:
\uD83E\uDD45 Goals
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Recent sandbox’s for review / deployments:
Item | Presenter | Notes | Thomas, Jyothish (STFC,RAL,SC) |||||||||
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Operational Issues | |||||||||||
Further observations from Data Challenge Future testing plans (RAL initiated / VO initiated) ? | All | To improve still: LB, Checksums (inflight + metadata),
RR with failsafe hotspotting | |||||||||
Rocky 8 migration planning | |||||||||||
Deletion studies through RDR | Previous deletion times reported were from the client side, end-to-end. Now analysing times for individual ceph_posix_unlink calls, and will look at deletion request times with XRootD itself. That is, looking at the amounts of time that a deletion request takes travelling though layers of XRootD code. I’ve noted some strange outliers from an initial sample (y-axis times in ms, last tick should read 80000 ms.) Outlier for ceph_posix_unlink at 90s? stddev of 4476 for the plot below. 6808 samples taken for a single gateway from 22nd Feb:  | ||||||||||
Deletions |
Next steps: Identify potential solutions. | ||||||||||
Planning for ALICE CMSD redirection | INC-163994 - DNS ip additions | ||||||||||
Checksums fixes | |||||||||||
Prefetch studies and WN changes | |||||||||||
Tokens Status | |||||||||||
CMSD Load balancing | PR: It replaces the current algorithm in xrootd. testing for simulated behaviour in progress. | ||||||||||
SKA Gateway box | |||||||||||
5.6.x root TPC issue | https://github.com/xrootd/xrootd/issues/2202 issue open, under investigation |
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Putting first new storage nodes in a long time into production next week, any tips?
Tom: better control of number of placement groups that could be moving.
Glasgow
✅ Action items
James Walder to schedule a ‘hackathon’ within a F2F to have a session on architectural planning.
James Walder to prepare an outline of the expected roadmap for XRootD developments in 2024.
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