2024-03-07 Meeting Notes

Owned by James Walder
Last updated: Mar 08, 2024
2 min read

 Date

Mar 7, 2024

 Participants

  • @James Walder

  • @Thomas, Jyothish (STFC,RAL,SC)

  • @Thomas Byrne

  • @Alexander Rogovskiy

  • @Thomas, Jyothish (STFC,RAL,SC)

  • Lancs: Gerard, Steven, Matt

  • Glasgow: Sam

Apologies: @Ian Johnson

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)

wk 19th March, moving gateways to the new network.

 

Further observations from Data Challenge

Future testing plans (RAL initiated / VO initiated) ?

All

 

 

Rocky 8 and 9 migration planning

 

 

 

Deletion studies through RDR

@Ian Johnson

 

 

 

Deletions

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

 

 

Planning for ALICE CMSD redirection

@Thomas, Jyothish (STFC,RAL,SC)

INC-163994 - DNS ip additions

 

Checksums fixes

@Alexander Rogovskiy @Thomas, Jyothish (STFC,RAL,SC)

Noscript checksum by Jo-stfc · Pull Request #9 · stfc/xrootd

svc25 with updated checksum (also with the internal checksum calculation).

 

Prefetch studies and WN changes

@Alexander Rogovskiy

 

 

Tokens Status

@Thomas, Jyothish (STFC,RAL,SC) @Katy Ellis

Looking into tokens through redirection; (i.e. redacting the release of a token).
TPC still can see tokens in certain cases.

 

CMSD Load balancing

@Thomas Byrne @Thomas, Jyothish (STFC,RAL,SC)

PR:
revised load balancing algorithm - weighed random selection by Jo-stfc · Pull Request #8 · stfc/xrootd


 

 

SKA Gateway box

@James Walder

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

4 Nodes awaiting installation:

2 for Exit pod (+ 1 existing)
1 for cloud
1 for Tier-1 usage

 

5.6.x root TPC issue

 

root:// TPC transfer fail with xrootd 5.6.x · Issue #2202 · xrootd/xrootd

 

 

 

on GGUS:

Site reports

Lancaster: Had a bad time of it due to getting too full - a lot of slow ops. This caused xroot load and service drops there. Tightened atlas belt a bit helped free up some space, and we’re rolling out meatier MDSs (double the RAM).

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

 

 

 

 Action items

  • @James Walder to schedule a ‘hackathon’ within a F2F to have a session on architectural planning.

  • @James Walder to prepare an outline of the expected roadmap for XRootD developments in 2024.

  •  

 

 Decisions