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Notes

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

Worker Node writable XCache.
XrdCeph buffer size and numbers of buffers, resulting in OOM
(8 byte buffers). Still need some ‘buffering’ for writes/ or a method to make large writes. lcg2345 (lhcb) lcg2500 (has logs)
(Would be important to try and resolve pre-data challenges, for reduced external gateway load).
James Walder to check logs and code.

Compilation and rollout status of RAL XRootD versions

Thomas, Jyothish (STFC,RAL,SC)

5.7.3 released (awaiting other changes to gateways)

XRootD Managers De-VMWareification

(Moving to physical hosts)

Thomas, Jyothish (STFC,RAL,SC)

/wiki/spaces/GRIDPP/pages/872644647

XRootD Cluster Shuffle
complete, no issues

XRootD collaboration Meeting

https://indico.cern.ch/event/1510817/

Thursday 20 Feb 2025, 14:30 → 17:00 UTC

Cancel this meeting next week?

cms-aaa naming convention

Thomas, Jyothish (STFC,RAL,SC)

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, and sandbox is prepared and has been tested on a test host

cms-aaa jemalloc use

Thomas, Jyothish (STFC,RAL,SC)

testing on svc20, some memory leak still present

Shoveler

Katy Ellis

Shoveler installation and monitoring

On the fly Checksums

Jira Legacy
serverSystem Jira
serverId929eceee-34b0-3928-beeb-a1a37de31a8b
keyXRD-98

Ian Johnson

Deletions

Jira Legacy
serverSystem Jira
serverId929eceee-34b0-3928-beeb-a1a37de31a8b
keyXRD-83

NTR

XRootD Writable Workernode  Gateway Hackaton

Thomas, Jyothish (STFC,RAL,SC)

rolled back due to memory issues related to buffer size.

Plan: file query system to summarize XRootD Logs

Plan to create a system to store info from across all gateways to search a filename and get creation time, last write time, last successful stat and deletion time in case of ‘lost’ files. Possible graduate sideproject.

100 GbE Gateway testing:
SKA / Tier-1

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

UKSRC - Acting as source for SRCNet verification tests; not being stressed so far …

Teir-1 .

UKSRC Storage Architecture

Tom B. Working on CephAdm setup for the cluster. JW attempting to reinstall the hosts.

Tokens Status

  • Operational

  • Technical

  • Accounting

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