2024-01-25 Meeting Notes
Date
Jan 25, 2024
Participants
@Thomas, Jyothish (STFC,RAL,SC)
@Alexander Rogovskiy
@Thomas Byrne
Lancs: Steven, Gerard, Matt
Glasgow: Sam
Apologies:
CC:
Goals
List of Epics
New tickets
Consider new functionality / items
Detailed discussion of important topics
Site report activity
Discussion topics
Current status of Echo Gateways / WNs testing
Recent sandbox’s for review / deployments:
Item | Presenter | Notes |
|
---|---|---|---|
Operational Issues | @Thomas, Jyothish (STFC,RAL,SC) | packet loss on perfsonar?
|
|
Gateways and WNs: | @Thomas, Jyothish (STFC,RAL,SC) | stable status currently
To resist installing 5.6.4; before the break, one sets of sets (TPC transfers) was failing against another site. To repeat the tests and see |
|
bugfix for calculating striper objects in direct reads |
| https://github.com/stfc/xrootd-ceph/pull/50 passed test on gw8 and code reviewed |
|
ECHO File transfer / throughput studies | @Katy Ellis | Tests of per-file transfer writes into Echo. tests ongoing on svc20 and gw8 |
|
Checksums fixes | @Alexander Rogovskiy | Status and plans for improving Checksumming work … https://github.com/alex-rg/xrd_ckslib/tree/main (Sandbox prepared and applied to GW8) |
|
Prefetch studies and WN changes | @Alexander Rogovskiy | Sandbox ready and applied to 1 WN, pending envroinment variable for timeout increase |
|
Deletion studies through RDR | @Ian Johnson | continuining with mixed results, previous set was 500 files 5000 files could not get uploaded, wasn’t completed after 20+ hrs (seems to have been a bad time - last Tuesday) 100 X 1GB deletion in 5 s check with Alessandra on rucio deletion concurrency (for DC24) ceph is performing better at the moment |
|
Tokens testing | @Thomas, Jyothish (STFC,RAL,SC) @Katy Ellis | https://stfc.atlassian.net/browse/XRD-63 |
|
Understanding CMSD Loadbalancing | @Thomas Byrne | explore different load balancing scheme (weighted placement) testing in internal cluster? how to measure improvements? more instrumented current version to measure improvement things look ~ok at the moment so lower in priority |
|
SKA Gateway box | @James Walder |
| |
Architectural review ‘hackathon’ | All | Plan the process for the Architectural planning of XRootD across the External Gateways and WNs |
|
2024 Planning |
| JW to prepare a summary of the plans for 2024 |
|
on GGUS:
Site reports
Lancaster - Unbalanced redirector issues from last week just disappeared… Currently disabled tokens for the reasons.
Glasgow - relatively stable, few network issues. OS/Ceph version update to do.
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.