Rucio Meeting

Thursday 19 May 2022, 15:00 → 16:00 Europe/Zurich

4/S-030 (CERN)

Martin Barisits (CERN)

1 News¶

• June meeting schedule
  • June 02
  • June 09
  • June 16 CANCELLED
  • June 23
• Next week no meeting! (Holiday @ CERN)
• Ticket review
  • eMail to component leads out for 1:1 meetings

2 Community News & DevOps roundtable¶

• ATLAS
  • Got Amazon S3 commercial cloud to run within WLCG infrastructure
    • Put in Rucio documentation together with the S3 article?
    • Very specific documentation to Amazon
• CMS
  • Started upgrade process to 1.28
    • So far on INT
  • Issue with DNs which have ',' inside them
    • Fixed by using LegacyDN
      • Legacy won't support unicode, special characters needs to be escaped, etc.
    • Added to helm-charts and containers (Option)
  • Getting Globus integrated
• Fermilab/DUNE/Ikarus/Rubin
  • DUNE waiting on DataChallenge
  • Ikarus accessing service off-site
  • Everyone
    • Looking at argo CD (Instead of Flux)
      • Argo CD specifically useful for multi-cluster setups
  • Dennis Lee joining Rucio efforts at FNAL
• DUNE
  • Data challenge
    • Staying with 1.26 LTS
    • Monitoring transactions and trans-atlantic throughput
  • QoS
    • Hope was to make more progress in DOMA QoS workgroup
    • Change of Pledging system is a barrier for established experiments
    • DUNE will critically rely on QoS
      • Need to find a way forward to make it a usable product for everyone
  • Token timeline in Rucio
    • DUNE timeline driven by RHEL goes end of service (2024)
  • Load into Rucio a custom proximity map
    • Especially for sites which do not have storage and thus no distance entry in Rucio
• Belle II
  • Waiting on migration for 1.28
    • Migration to 1.29 pending then on python 3 migration of DIRAC (End of summer)
  • Discussion on archival features for metadata
    • Discussion between Rob, Cedric, Martin yesterday, Cedric will work on it for 1.29
• ESCAPE
  • Moved from 1.28.2 to 1.28.4
  • Looks like after submitting a rule the submission of the transfer takes longer
    • Took 5h to submit a transfer
      • Although daemons looked not very busy
  • PR to fix Jupyterlab extension
    • Error was with the change of DIDTypes from strings to enums
• SKAO
• MultiVO/RAL
  • Issue #5319 for implementing posix protocol with symlink functionality
    • Unittest would be beneficial

3 Hot topics¶

4 Developers roundtable¶

Progress-2022-05-19.png

• Rucio 1.29 "Into the donkeyverse" progress tracking
  • In Progress​​
    • Further ingetragtion of CMS-style consistency checking #5438 [Igor]
    • Fix client API documentation page #5444 [Joel]
      • Basically done, some edge cases
    • Remove old readthedocs documentation once the new one is fully operational #5446 [Joel, Martin]
    • Ticket Cleanup Marathon [Martin, All]
    • Reduce logging of server & daemons #5449 [Mayank]
      • Now access to ES
      • Started to populate dashboards about frequency distribution of log patterns
    • Authentication workflows in WebUI 2.0 #5135 [Mayank]
      • stuck on setting up base repo for webui
    • Add python 3.10 tests to CI framework. #5145 [Mayank]
      • Fedora images are ready for 3.10
      • Stopped to work on CC7 - not worth it
      • Currently looking into centos stream 8
    • Setup WebUI repository for external collaboration #w/12 [Mayank]
      • Update next week
    • Introduce heartbeat handler to all daemons #5443 [Radu, ALL]
      • Started to move some daemons to the new daemon_handler
    • Further integration of temporary tables to other major workflows #5441 [Radu]
    • Further OIDC and SSO optimization and documentation #5437 [Rizart]
      • Ticket done, now looking on related ticket which will be submitted as one
    • Migration of SQLAlchemy queries to new query syntax (1.4 -> 2.0) #5247 [Yuyi, ALL]
      • ongoing (sessions.py)
      • not yet too scary :-)
      • Radu: also work on transfer part? how to enable warnings
        • SetEnv PYTHONWARNINGS always::DeprecationWarning
          SetEnv SQLALCHEMY_WARN_20 1
          https://docs.sqlalchemy.org/en/14/changelog/migration_20.html
      • Now trying to build a test to identify missing queries
  • In Review
    • Hermes 2 evolution #4610 [Cedric]
      • Comments to be included
    • Calculation of container length and events #5422 [Radu]
      • Difficult to calculate proper statistics for containers without performance degredation
      • Open PR, but unclear if it fully closes the issue
  • Done
    • re-evaluate the greedy = 1TB constant #5358 [Cedric]
    • Clean dead code in the probes (ATLAS and common) #83 [Eric, Dimitrios]
    • boto vs boto3 #5346 [James, Mario]
    • mypy static code analysis #4455 [Mayank, Ben, Joel]
      • Discussion for type checking and documentation for developers guide coming
    • Flag transfer errors coming from tape sources #5410 [Radu]
    • Re-factor/cleanup deletion workflow #5442 [Radu]
    • Add session object to API layer #5439 [Radu]
    • Remove author list from headers [Martin, Joel]
  • Todo
    • Create a contributor guide for probes #84 [Dimitrios]
    • Adherence to rule grouping dependent on order of ATTACH #5251 [Igor]
    • Create a server/daemon installation howto #5445 [Joel]
    • Add symlinks for the new daemon names #5131 [Joel]
      • Prepare a clear list of changes which need to be made to use new daemon names #5132 [Joel]
    • Reduce core component tickets to less than 10 [Mario, Martin, Gabriele]
    • Document and cleanup discrepancies between surl and lfn2pfn algorithms #5129 [Martin]
    • Unable to Delete File DID via Undertaker #5154 [Martin]
    • Removal of Python 2.7 dependencies from the code #5435 [Martin]
    • Reduce rule tickets to les than 10 [Martin]
    • Create developers testing guide in the documentation #5452 [Mayank, Joel]
      • Ben working on sub-task to test locally
    • Remove direct DB dependence from the WebUI #4319 [Mayank]
    • Analyze feedback on UI Survet #w/13 [Mayank]
    • Remove full_mode switch from conveyor-receiver #5453 [Radu]
    • Exchange of function-based indices with normal indices #5440 [Radu, Mario, Martin]
    • Re-work/cleanup distance table #5454 [Radu]
    • Create documentation page for S3-type storage #5450 [Rizart]
      • Exists as GGDoc (#5284)
    • Add support for S3 virtual hosted buckets #5451 [Rizart]
      • Test on-premise
      • Ongoing support issue with AWS/Fresno X.509 shenanigans
    • Update/Re-design core.meta module #5224 [Rob]
    • Merge list_dids and list_dids_extended methods #5448 [Rob]
• Container linux distribution
  • CC7 images harder to manage (Python 3.10++)
  • CS8 and CS9 already in testing
  • Any strong preference for an OS for the official rucio images?
    • Can it be something else than CentOS?
    • ATLAS -> CentOS (Stream)
    • Fermilab -> CentOS
    • CMS offline jobs moving to alma8
      • Otherwise no preference for the actual rucio container
  • Python versions - 3.10 needed?
    • Not strictly needed, but would be good eventually

5 AOB¶

• Rucio workshop 2022
  • For now operating assumption, due to Covid and travel restrictions we will have the workshop at CERN in September/October
  • However, if any institute would like to host the workshop please get in contact with me asap