2024-12-12 Meeting Notes

Operational Issues
Gateways and WNs:
- Current status and upcoming changes

(Gateway Auth failures)

Upgrades of GWs complete

Mini-DC challenge not perturbing RAL performance.

Checksums issue with an ATLAS file

https://github.com/xrootd/xrootd/issues/2388

https://ggus.eu/index.php?mode=ticket_info&ticket_id=169360

Checksum requested before whole file is updated. No ability to do stale checksum check in ceph, so original checksum ‘sticks’ to the file.

cms-aaa naming convention

cms-aaa is the only remaining personality to use proxy/ceph as the xrootd service names

Separate naming convention would be more appropriate, to have main/supporting

(not so urgent).

CC created, but due to be reviewed December

XRootD Managers De-VMWareification

@Thomas, Jyothish (STFC,RAL,SC)

Option 2 preferred for efficiency, but Option 1 decided on

Option 1 would be simpler to implement for a temporary fix, as the move would be reversed

antares tpc nodes to be moved to an echo leafsw, to confirm ipv4 real estate with James
lfsw30 (UPS room) decided on destination

Compilation and rollout status with XrdCeph and rocky 8: 5.7.x

@Thomas, Jyothish (STFC,RAL,SC)

5.7.2 published.
Investigating xrootd.redirect for write operations.

Shoveler

@Katy Ellis

Shoveler installation and monitoring

Deletion studies through RDR

@Ian Johnson

Deletions

https://stfc.atlassian.net/browse/XRD-83

XRootD Writable Workernode  Gateway Hackaton

@Thomas, Jyothish (STFC,RAL,SC)

XRootD Writable Workernode  Gateway Hackaton (XWWGH)

Tues 12th Nov 1600
Hackaton writeable workernode

Outcomes

Xrootd testing framework

XRootD Site Testing Framework

100 GbE Gateway testing:
SKA / Tier-1

@James Walder @Thomas, Jyothish (STFC,RAL,SC)

https://stfc.atlassian.net/wiki/spaces/UK/pages/215941180

Open

Average per-file transfer speeds (for 10 concurrent transfers, 1 or 5 GiB files)

UKSRC Storage Architecture

Tokens Status

• Operational

• Technical

• Accounting