2024-08-15 Meeting Notes

Date

Aug 15, 2024

Participants

@James Walder
@Alexander Rogovskiy
@Thomas, Jyothish (STFC,RAL,SC)
@Mariam Demir
@Katy Ellis
Lancs: Matt, Steven, Gerard
Glasgow:

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

Item	Presenter	Notes
Operational Issues Gateways and WNs: - Current status and upcoming changes	@Thomas, Jyothish (STFC,RAL,SC)	svc23/24 LB not working as intended. Focussing on one gateway. Testing with the ‘upstream’ LB to check if resolves the issues. Default socket timeout is ‘never’. Setting to 1 hour for testing.
Compilation status with XrdCeph and rocky 8: 5.7.x	@Thomas, Jyothish (STFC,RAL,SC)	working with XrdCeph (compiling together) testing on gw15. Includes the upstream pgreads fix.
Gateway Auth failures	@Thomas, Jyothish (STFC,RAL,SC)	Auto-restarting on this failure mode is enable. Still observing occasional cases.
XrootD Workshop plan	@Alastair Dewhurst @Katy Ellis	XRootD and FTS Workshop @ STFC UK One month to go! @Alastair Dewhurst to set up meetings, for filling up of agendas, etc. (11 am this Friday) @Alastair Dewhurst will send out confirmations of accommodation (and sort out MP and AH extra day). @Katy Ellis to forward details on the XRootD Dev. meeting to AD.
Shoveler	@Katy Ellis	Shoveler installation and monitoring Working on how to send monitoring to two different IPs (now working). To be tested on WN preprod.
Future developments ideas planning work	@Ian Johnson @Thomas, Jyothish (STFC,RAL,SC)	Notes from planning meeting 22-04-2024
Deletion studies through RDR	@Ian Johnson
Deletions	https://stfc.atlassian.net/browse/XRD-83
Planning for ALICE CMSD redirection	@Thomas, Jyothish (STFC,RAL,SC)	Now managed by redirector, using the DNS round robin. (change to dns round robin for today).
Checksums fixes	@Alexander Rogovskiy @Thomas, Jyothish (STFC,RAL,SC)
Prefetch studies and WN changes	@Alexander Rogovskiy	Read requests fail for proxy+origin setup under heavy load · Issue #2308 · xrootd/xrootd
Tokens Status		To split this into Operational aspects and any development / long-term planning aspects.
Xrootd testing framework	@Mariam Demir	XRootD Site Testing Framework Pull requests · stfc/xrootd-testing-framework
SKA Gateway box	@James Walder	https://stfc.atlassian.net/wiki/spaces/UK/pages/215941180 No progress with DHCP config. Still issues with DHCP and booting. Work arrounds being investigated

on GGUS:

Site reports

Lancaster: Quiet. Steven is working on a monitoring talk for the XRootD workshop (with a plea to improve the xroot logging). Gerard is working on a Slow Ops investigation for CHEP. Kicked our “what to do about no el8 reef?” decisions until post-CHEP, we’re likely looking at a much-much-much earlier then planned move to Alma9.

Glasgow: gridpp scheduling.

XRootD