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Presenter

Notes

Impact of Vector Read update to Echo

Vector Read

Timeline on Batch farm

5th May: ` wn-2020-xma - wn-2022-lenovo` will be set to drain.
9th May:
- Merge the sandbox http://aquilon.gridpp.rl.ac.uk/sandboxes/diff.php?sandbox=update_cvmfs_client into production.
- Drained workers will have the package `egi-cvmfs` manually removed.
- Manually remove the `xrootd-proxy.service` (/etc/systemd/system/xrootd-proxy.service)
- Manage workers into ~~http://aquilon.gridpp.rl.ac.uk/sandboxes/diff.php?sandbox=xrootd-patch~~ ~~(will include cherry-picked commit for the Docker patch~~). http://aquilon.gridpp.rl.ac.uk/sandboxes/diff.php?sandbox=docker-cvmfs-xrootd-combo This sandbox combines all changes and gives a clear view of all changes (DO NOT DEPLOY).
- Confirm workers have successfully compiled:
- Check: `healthcheck_wn_condor` outputs healthy status.
- Check ` xrootd-gateway.service` outputs healthy Docker status.
- Bring online tranche at a time confirming with data team xrootd is working as expected.
10-11th May: Let the updated workers run for a few days.
12th May: `wn-2017-dell (all 2017’s) - wn-2019-dell` will be set to drain.
15th May: Repeat above process for second half of workers.
16th May: Merge all required sandboxes into prod and manage farm back into `prod_batch` in AQ

Discussion on merging bufferedIO into master.
Also to discuss pushing changes to “upstream” (xrootd/xroot-ceph”

Needs testing for ‘correctness’

Also some discussion ongoing on xrootd “issues” on the xrootd-ceph sub-module:
https://github.com/xrootd/xrootd/pull/2008

SEGV investigations with -S multi-stream flags

Jira Legacy

fix in ‘master’ of core xrootd; not yet added to a tagged xrootd release; to follow up with Ian Johnson

CMSD status

Jira Legacy

CC document

Transfers of 0-byte files

Jira Legacy

Observed Dune transfer failures using 0-byte files

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