2024-11-14 Meeting Notes

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

(Gateway Auth failures)

@Thomas, Jyothish (STFC,RAL,SC)

accidentally broke preprod workernodes - docker had cached old layers for the new image

cms-aaa naming convention

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, but due to be reviewed December

XRootD Managers De-VMWareification

@Thomas, Jyothish (STFC,RAL,SC)

Option 2 preferred for efficiency, but Option 1 decided on

Option 1 would be simpler to implement for a temporary fix, as the move would be reversed

antares tpc nodes to be moved to an echo leafsw, to confirm ipv4 real estate with James

Compilation and rollout status with XrdCeph and rocky 8: 5.7.x

@Thomas, Jyothish (STFC,RAL,SC)

Upstream merging in process. Branch now exists.

Documention (particularly for the Buffered IO is needed).

Shoveler

@Katy Ellis

Shoveler installation and monitoring

Deletion studies through RDR

@Ian Johnson

Deletions

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

periodic hackaton?

@Thomas, Jyothish (STFC,RAL,SC)

XRootD Writable Workernode  Gateway Hackaton (XWWGH)

Tues 12th Nov 1600
Hackaton writeable workernode

Xrootd testing framework

XRootD Site Testing Framework

100 GbE Gateway testing:
SKA / Tier-1

@James Walder

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

Following up on server installs
awaiting hostname, cabled but not installed

UKSRC Storage Architecture

For v0.1 Requirements:

POSIX-like access be provided ‘next to’ the compute.
Via ‘some method', files / directories are mounted (RO) for applications (eg. Jupyterhub) to read from.

POSIX area ‘should be’ an RSE, to enable the transfers, and lifecylce management.
Bulk storage “May” exist, required a TPC into the ‘cache’ area.

Dissadvantages:
- Unnecessary data movement perhaps (and via TPC)
- Mounts and permissions

Other ideas:

Manilla style shares / volumes for each DID / container requested ?
- Rucio ‘download’ rather than TPC
- Lifecycle management on the Manilla share layer?

Tokens Status

• Operational

• Technical

• Accounting