Q2 2026 Report and Planning

Wednesday 1 Jul 2026, 16:00 → 16:55 Europe/Zurich

32/S-C22 (CERN)

Round Table

Marciej Szymanski:

• Expressed interest in RNTuple attributes asking whether they can be tested even if they are experimental. Entities in the Experimental name space are for their own nature to be tested: ROOT encourages the testing of attributes and is eager to hear feedback!

 

ATLAS: Excused (ATLAS Week)

CMS: Excused

ALICE: Anton Alkin

• RNTuple directly integrated; essentially ready. Waiting for the green light of the management to switch.

• ROOT versions: Can't comment in detail on version plans, but ALICE is most likely flexible to switch to the latest during LS3

• RDataLoader: Will organise a meeting with RDataLoader developers in August

• Level of SOFIE usage: No widely known use cases, but possibility to check in more detail. They have the possibility to use ONNX.

• Could ONNX loading be more configurable?

 

LHCb: Ben Couturier

• RDataLoader: Happy with how the ROOT liaison advertised it.

• Object auto registration: Marco is aware of the possibility to test it.

• Level of SOFIE usage: To be checked

 

Dune: Andrew Olivier

• Release schedule: Using 6.28 currently, will try moving to 6.40

• RDataLoader: Looks interesting

• TDirectory auto registration testing: Will bring up the feature with the relevant experts

• Not aware of SOFIE usage for now

• Can token authentication be used with the "roots:" protocol?
  A: Need to check in detail, but "roots:" is an old protocol. Likely better to use the "root:" protocol and let XRootD handle the authentication.

 

FCC: Excused

FairROOT: Florian Uhlig

• RNTuple integration into FairROOT ongoing. 20% gains.

• RDataLoader: Interesting for experiments, but not necessarily for the FairROOT framework. Will forward the information to experiments.

• Ownership: Looking into it, cleaning up the code.

• SOFIE: Not aware of use cases, but will discuss this in the context of FairROOT.

• New histograms interesting for the experiments. Will see how to proceed.

• Q1: Is ROOT compiling on macOS27?

  • Yes, fixes are here have been merged here: https://github.com/root-project/root/pull/22625

  • These are available in ROOT master and v6.40

• Q2: What is CERN doing about the AI company crawlers?

  • Deployed anubis to limit the rates on heavily visited services. See https://security.web.cern.ch/reports/en/monthly_reports/2026/2026-05.shtml

16:00 → 16:20 Q2 Report and Planning

Items:
- PoW completion status
- 6.42 Release: foreseen feature, planned innovations to be integrated
- Status of the issue trackers and review of the performance metrics

Speakers: Danilo Piparo (CERN), Stephan Hageboeck (CERN)

260701 - ROOT Q2 2026 Report.pdf

16:20 → 16:55 Discussion