CTA Dev Meeting

Thursday 12 Mar 2026, 15:00 → 16:00 Europe/Zurich

31/S-027 (CERN)

Joao Afonso (CERN)

1 CTA Release Roadmap

Latest CTA versions

Released

• Latest RPMs on public stable repo: 5.11.14.0-1 (link) (new public release)
• Latest RPMs on public testing repo: 5.11.17.0-1 (link)
• Latest RPMs on public unstable repo: 5.11.17.0-1 (link)

Deployed

• Pre-production: v5.11.17.0-1
• Production: v5.11.17.0-1

New versions

5.11.18.0-1:

• Milestones
• Release date: in 2-3 weeks
• Deploy date: TBD

2 Dev topics

Dev Issues

Other

• Dev issues link

Ops Issues

Other

• Ops issues link

SonarCloud review

• Link to CTA project on SonarCloud

3 AOB

CTA Ops Utilities

• Idris presentation about the Python SDK and the new CTA-ops CLI.
• Followed by Q&A.

EOS workshop review

• Workshop timetable

Topics relevant for CTA Development

XRootD 6.0

• Will add support for tokens with storage.stage and storage.poll.
• Will added to a release branch EOS shortly after. Release date TBD.

One File, Many Hashes: The New Alternative Checksums Feature

• Enables the calculation and storate of multiple hash types for a single file.
• Can be used with CTA, but needs to be performed synchronously (before data is evicted from disk.).

EOS File Notifications

• This can be used to send notifications to FTS/Rucio/etc when a file is archived or retrieved. Reduces the need for polling, which has been a long standing problem.
• Could also be used for other purposes (eg. monitor file deletions).
• We need to validate if it can work directly for all CTA workflow events.

I/O Shaping in EOS

• Bandwith can be limited on EOS.
• This could be used to avoid disk buffer overflows in a much more graceful way.

EOS Quotas by Logical Space

OC5 Subsidiary Rules

• Software Development & Configuration rules
• All CTA developers should read this document

For discussion

• SonarCloud license.

CTA-Operations-Toolkit.pdf