2023-06-08 Meeting Notes

 Date

Jun 8, 2023

 Participants

  • @Thomas, Jyothish (STFC,RAL,SC)

  • @Alexander Rogovskiy

  • @Ian Johnson

  • Lancaster: Gerard, Matt, Steven

Apologies:
@James Walder

 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

 

Next steps for WN deployment

 

Planning for rollout; Anticipated for next week - Needs @Thomas Birkett to confirm.
June 2023: Vector Read rollout (with XCache)

Tentative start date of June 7th, rollout is simpler compared to previous attempt (no drain required)

  • Final steps:

    • Created RPM with final updates ?

    • tested Docker / xrootd configurations ?

    • other concerns ?

Alex: concern: to ensure that configuration is correct.
Confirmed on the one WN: lcg2268. (based on GitHub PRhttps://github.com/stfc/grid-workernode/pull/38/files

http://aquilon.gridpp.rl.ac.uk/sandboxes/diff.php?sandbox=workernode-xrootd

 

EBUSY in readV requests

 

https://stfc.atlassian.net/browse/XRD-64

Actions to analysis the existing behaviour with the read request (where EBUSY) is already handled.

 

SEGV investigations with -S multi-stream flags

 

@Ian Johnson set ‘git bisect run’ going with a shell script to compile, install and restart XRootD, and test a multi-stream transfer. This identified a problem in re-using the the initial build environment at each step, should be easy to resolve.

 

CMSD status

 

https://stfc.atlassian.net/browse/XRD-41

single slash behaviour with cmsd redirector

“/” vs “//” issue:

  • Characterise the behaviour

  • Understand if this is something we need to provide some mitigating action on?

Options:

  1. Insist clients use “filesystem” like access (i.e. //) for root

  2. Allow mixed use filesystem and object id access. Add all.export <pool> lines for each pool

    1. can even remove the “/” export and add explicitly:
      (/store would stay as /store)

      all.export <pool:> all.export /<pool:>
  3. Understand / create / fix(?) oss.statlib functionality to behave as expected from xrd-dev perspective

 

 

 

 

 

 

 

 

on GGUS:

Site reports

 Action items

  •  

 

 Decisions

  1. Continue