\uD83D\uDDD3 Date
\uD83D\uDC65 Participants
Lancs: Matt, Gerard
Glasgow:
Apologies:
CC:
\uD83E\uDD45 Goals
List of Epics
New tickets
Consider new functionality / items
Detailed discussion of important topics
Site report activity
\uD83D\uDDE3 Discussion topics
Current status of Echo Gateways / WNs testing
Recent sandbox’s for review / deployments:
Item | Presenter | Notes | |
---|---|---|---|
Operational Issues | |||
Further observations from Data Challenge Future testing plans (RAL initiated / VO initiated) ? | All |
| |
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 | - XRD-83Getting issue details... STATUS 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 |
on GGUS:
Site reports
Lancaster: As mentioned in storage, Dune root TPC hit by https://github.com/xrootd/xrootd/issues/2202 at Lancs.
Had one slow OSD cause a lot of issues for ~12 hours this week. Coincided with a period of heavy CEPH traffic, and caused a lot of CEPHFS mounts to be dropped.
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.