2024-05-02 Meeting Notes

\uD83D\uDDD3 Date

02 May 2024

\uD83D\uDC65 Participants

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 Gateways and WNs: - Current status and upcoming changes	Thomas, Jyothish (STFC,RAL,SC)	2024-04-23 LHCb WGprod Echo overload (further updates?) proxy memory has been increased to match allocated memory. Things have been ok since then. Rocky8 containers with checksum library to be deployed next week "curl changing the case on el9" - caused some issues on FTS to CNAF
CHEP Abstract ideas	Thomas, Jyothish (STFC,RAL,SC)	Inputs and thoughts on existing and possible abstracts `The XRootD software framework plays a pivotal role in data access at WLCG (Worldwide LHC Computing Grid) sites. However, when dealing with the Echo storage service, a Ceph-based Erasure Coded object store at the RAL Tier-1, challenges arise due to the unique characteristics of Echo. In this paper, we address the various improvements done to the service, to improve` improvements/studies on deletion rates, load balancing and throughput increase over DC24
XrootD Workshop plan	Alastair Dewhurst
Rocky 8 and 9 migration planning		CC today for rocky8
Future developments ideas planning work	Ian Johnson Thomas, Jyothish (STFC,RAL,SC)	https://stfc.atlassian.net/wiki/spaces/X/pages/459997229/Notes+from+planning+meeting+22-04-2024?atlOrigin=eyJpIjoiNDRmNDEwOWI3Y2NhNDg5MDg4ZmZiYTNhNTliOWUwNmUiLCJwIjoiYyJ9
Deletion studies through RDR	Ian Johnson	.
Deletions	XRD-83 - Getting issue details... STATUS
Planning for ALICE CMSD redirection	Thomas, Jyothish (STFC,RAL,SC)
Checksums fixes	Alexander Rogovskiy Thomas, Jyothish (STFC,RAL,SC)	Rocky8 containers with checksum library currently in preprod, to be deployed next week
Prefetch studies and WN changes	Alexander Rogovskiy
Tokens Status	Thomas, Jyothish (STFC,RAL,SC) Katy Ellis
CMSD Load balancing	Thomas Byrne Thomas, Jyothish (STFC,RAL,SC)	PR: https://github.com/stfc/xrootd/pull/8/files
SKA Gateway box	James Walder	/wiki/spaces/UK/pages/215941180 4 Nodes awaiting installation: 2 for Exit pod (+ 1 existing) 1 for cloud 1 for Tier-1 usage

Xrootd testing framework	Mariam Demir

on GGUS:

Site reports

Lancaster: Gerard embarked and a grand adventure in CEPH upgrades this week, first to the top of Pacific, then to Reef (all done whilst live). Nothing really important exploded, but the monitoring and dashboards have been finicky. In general smooth sailing though. In hindsight Gerard reckons he might well have skipped going to the top of Pacific first and just gone straight to Reef. On xroot, the LSST auth errors mentioned last week turned out to be on their side (they were using a defunct voms server to serve their proxies) - so not an xroot issue per se, but the fact that this impossible to debug from the xroot side is a huge niggle.

Glasgow: Sam build newer versions of xrootd on CC7 and 8. (anticipating 5.6.9), and awaiting any updates for LB.

https://github.com/stfc/xrootd-ceph/tree/variableobjectcleanup

https://github.com/xrootd/xrootd/pull/2246