Brian Paul Bockelman (University of Wisconsin Madison (US)), Maria Arsuaga Rios (CERN), Petr Vokac (Czech Technical University in Prague (CZ))

Topic: WLCG DOMA BDT Meeting (twiki)

    • 4:30 PM 4:35 PM
      News 5m
    • 4:35 PM 4:45 PM
      Tape REST access 10m
      Speaker: Mihai PATRASCOIU (CERN)

      StoRM TAPE REST implementation

      • should be already available according Stephan

      CMS status

      • ~ 3 sites ready to be switched to TAPE REST
      • davs protocol in Rucio already configured for TAPE RSEs
        • Rucio automatically sends transfers requests from TAPE RSEs with "bringonline timeout"
        • this is sufficient for FTS to use TAPE REST for davs transfers
      • now it is sufficient just to delete SRM protocol

      ATLAS status

      • details tracked in the Tape REST twiki timeline (FZK, CERN in production)
      • stuck while trying to understand if it would make sense to reorganize storage namespace for tokens
        • no reorganization
      • revive effort to move away from SRM
    • 4:45 PM 5:00 PM
      Transfers with tokens 15m
      Speakers: Petr Vokac (Czech Technical University in Prague (CZ)), Francesco Giacomini (INFN CNAF)

      Rucio / FTS & tokens

      dCache access with just tokens including storage.* scopes

      • latest dCache allows more simple configuration that gives access only to tokens with storage scopes
        • available in 9.2 and backported to 8.2.33
      • ongoing tests before we ask dCache sites to configured tokens
        • DESY is testing this configuration
        • FNAL also for CMS
        • PRAGUELCG2 is going to test it for ATLAS
      • preferred solution for WLCG experiments
        • sites will be most probably asked to move to the most recent dCache releases when they would like to enable tokens
    • 5:00 PM 5:10 PM
      Packet marking 10m
      Speakers: Marian Babik (CERN), Shawn Mc Kee (University of Michigan (US))

      Scitags support announced:

      • Rucio from 32.4.0 (interface to FTS to be defined)
      • FTS from 3.12.11 and GFAL2 from 2.22.0
        • release next week / deployed on CERN pilot instance
        • other production instances with standard schedule (+ 2 week)
      • Xrootd (this ticket now becomes relevant: https://github.com/xrootd/xrootd/issues/1984 HTTP-TPC support)
        • Brian contacted Cedric - XRootD development can move forward with SciTag support
        • currently XRootD supports just static configuration (can't be used on multi-VO instances and no activity details)

      UCSD/Caltech testing flowd, interested in both fireflies and packet marking
      .  - Looking into flowd integration with Kubernetes
      .  - Packet marking readout already available via sFlow

      Preparations for SC23 on-going, plans:
      .   - Show 400Gbps packet marking (with xrootd, disk-to-disk and iperf3)
          - Use fireflies and show R&E dashboard based on data received (in collaboration with ESnet)
      We will submit abstract to DC24 workshop to give an update on our plans.

      Meetings on BBRv3, TC, jumbo frames testing (https://indico.cern.ch/event/1329666 https://indico.cern.ch/event/1337182/)

    • 5:10 PM 5:25 PM
      WebDAV Error Message Improvement Project & unified error message format 15m

      Discuss with experts improvements in the error messages produced by failed transfers.

      Speaker: Stephan Lammel (Fermi National Accelerator Lab. (US))
    • 5:25 PM 5:30 PM
      AOB 5m

      Next meeting only after DC24 Workshop (November 9-10)