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WLCG Management Board #323

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513/R-068 (CERN)

513/R-068

CERN

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Simone Campana (CERN)
Description

16:00 CERN/10:00 EDT/09:00 CDT

URL for the ZOOM call: https://cern.zoom.us/j/66011416092  (the passcode has been distributed by email)

To join by phone (see the dedicated support page):
1) dial your local ZOOM number (e.g. +41432107108) then enter the MB meeting ID  660 1141 6092 then #
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Email Distribution List: worldwide-lcg-management-board@cern.ch
Email List Archive: worldwide-lcg-management-board (requires CERN authentication)
Minutes: Management Board Meeting Minutes
Action List: MbActionList
See also the: WLCG Document Repository,  WLCG Web Site

WLCG Management Board
Zoom Meeting ID
66011416092
Host
Andrea Sciabà
Alternative hosts
Simone Campana, Maarten Litmaath
Useful links
Join via phone
Zoom URL
    • 16:00 → 16:25
      Minutes and Matters Arising 25m
      • Clarification on tape buffers 5m
        Speaker: Simone Campana (CERN)

        Tape buffers are NOT part of the pledge, but rather part of the tape infrastructure (together with e.g. tape drives, tape libraries, ...).

        This is under the assumption that the buffer is used only to move data in and out of tape and not as a disk storage for data processing. 

      • Severe issue affecting the GEANT Trusted Certificate Service 10m
        Speaker: Maarten Litmaath (CERN)
        GEANT-TCS-crisis-241126.pdf
        GEANT-TCS-crisis-241126.pptx
      • Outcome of the LHCC meeting 10m
        Speaker: Simone Campana (CERN)
        20241119 Analysis Infrastructure Charge - LHCC-2.pdf
        • Positive statement of the LHCC about the Open Technical Forum as a mechanism to build consensus on the technical roadmap. The LHCC expects some progress from the TCB in defining the structure of such roadmap by mid 2025. 
        • The LHCC positively commented on the plan of DOMA mini-challenges in preparation for the next Data Challenges. It recognised that having tokens fully functional will be one of the main goals in preparation for the next DC.  
        • The LHCC acknowledges substantial progress in the transition to tokens. At the same time, it highlights that significant challenges in the area of tokens need attention. Convergence of different possible approaches is desired. The next year will be crucial. 
        • The LHCC looks forward to the establishment and initiation of activities by the HSF Advisory Group, for long term planning 
        • The GEANT4 collaboration has shown a solid roadmap, with a careful trade off between accuracy and speed. The progress made by Adept and Celeritas in offloading EM showering to GPUs will be benchmarked in Q1 2025. The expected bottleneck is the current geometry model (based on solids). The LHCC recommends the collaboration between GEANT4 and experiment teams in advancing the integration of Fast Simulation into GEANT4, including the one based on generative AI .
        • A focused session on Analysis Facilities will take place at the next LHCC.  A charge document was provided to the experiments (in attachment).
        • The LHCC reviewed in a focused session the experiment-specific parameters in use for resource requests. There was no report on that session. The LHCC will iterate with the experiments and prepare for a discussion with the CRSG for the 2026 resources. The review of the experiment specific parameters will be planned every year at around the same time.
        • The LHC schedule for 2025 and 2026 is being fine tuned. The volume of data in 2025 will be larger than anticipated (could be larger by up to 50%). We will need to mitigate the impact (no chance to re-discuss 2025 resource requests at the RRB). Priority will be ensuring the experiments can collect and retain data (i.e. storage and particularly tape). We will need to understand from the experiments what the 2025 needs will be as soon as the schedule is finalized (early Dec). Suggest to discuss this at the first MB in January 2025.     
      • News from WLCG TechCoords 5m
        Speakers: Alessandro Di Girolamo (CERN), James Letts (Univ. of California San Diego (US))

        News from Tech Coords

        • Open Technical Forum (OTF) meetings:
          • 10th of Dec OTF#2. Working on the agenda [1] now. We have 2 talks already (Alastair and CERN Storage team), we are going to ask for more contributions, feel free to propose.
          • The first OTF [2] was held on November 13th, co-scheduled with the DOMA General meeting. Interesting discussions on the token transition and CVMFS.
        • TCB membership: We would love to know from the MB members if they have suggestions for TCB members, based on the description we made last MB.
        • Tech Roadmap: We have started thinking about a structure and a list of topics we believe should be in our WLCG Tech Roadmap. We would like to know from the experiments how they see the WLCG Tech Roadmap wrt their CDR/Roadmaps/TDR, having a chat with the relevant persons would be useful for us.
        • Tokens: we discussed in detail with Maarten et al. to work on drafting a detailed plan.

         

        [1] https://indico.cern.ch/event/1478941/

        [2] https://indico.cern.ch/event/1471694/

    • 16:25 → 16:30
      Action List Review 5m
    • 16:30 → 16:40
      WLCG Service Report 10m
      Speakers: Guillermo Facundo Colunga, Maarten Litmaath (CERN)
      WLCG-svc-report-241126-v11.pdf
      WLCG-svc-report-241126-v11.pptx
    • 16:40 → 16:55
      First draft of a site decommissioning procedure - technical steps 15m
      Speaker: Julia Andreeva (CERN)
      Draft of the procedure which site has to follow in case it decides to withdraw from WLCG collaboration
    • 16:55 → 17:05
      Update on the WLCG/HSF workshop 10m
      Speaker: Michel Jouvin (Université Paris-Saclay (FR))
      WLCG_HSF Workshop @IJCLab - WLCG MB.pdf
    • 17:05 → 17:10
      AOB 5m
      • Next MB Meeting: Tuesday 17 December 2024 1m
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