LHCONE R&D and RNT-WG call

→ Europe/Zurich
Edoardo Martelli (CERN), Joe Mambretti (International Center for Advanced Internet Research Northwestern University), Marian Babik (CERN), Shawn Mc Kee (University of Michigan (US))
Zoom Meeting ID
97610360540
Host
Edoardo Martelli
Alternative host
Marian Babik
Useful links
Join via phone
Zoom URL
    • 17:00 → 17:20
      LHCONE 20m
      Particpants: Edoardo Martelli, Phil Demar, Dale Carder, Pablo Collasto Soco, Asif Shan, Joe Mambretti, Bill Johnston, Marian Babil, Luca Bassi, Bruno Hoeft, Ettore Tamiro. Andy Lake, Chris Walker. Thomas Tam.
       
      Next LHCONE meeting:
      - LHCOPN 20 year celebration: We would like to form a commitee to organize a small celebration. Volounteers: Bruno, Bill, Joe, Edoardo
      - Presentations for LHCONE meeting: send proposal to Edoardo.

      MultiONE new tags.
      discussion about the email sent by Edoardo to the mailing list. 
      There may be the need to for new tags for these cases:
      A) LHCONE Site affiliated with a given experiment, but offering Opportunistic Resources to other experiments. 
      - Should we add one community for such case? Is it one community enough for all the experiments, or should there more?
      B) LHCONE Site providing resources to other experiments which should not be connected to LHCONE.
      We have seen in the past that LHCONE can be used by experiments outside the AUP.  I got a question from a site worried that the day that MultiONE filtering is implemented, it could break connectivity for underground experiments it is serving.
      - Should we add a generic community for Other-not-LHCONE-Experiments? 

      Discuusion follow: For A) the solution would be to apply all tags for which  opportunistic resources are granted.  For (B) it would be better not to filter.
       
      Ettore presents a solution where every experiment has an additional tag for the opportunistic resources that can be offered to another experiment. 
       
      The problem is that the tagging must be symmetric to the filtering, otherwise the path will become asymmetric. 
      The matter will be discussed more in detail during the f2f meeting in Manchester

      Change of AUP 
      During the MultiONE email discussion, a site commented that they  "would certainly love the AUP language to be softened such that nodes on which LHC jobs could be scheduled dynamically at any time could use LHCONE to talk to any other LHCONE-connected networks"
       
      For the people in the call there should not be a problem to add servers that are in the same datacentre network with the WLCG nodes. It seems the AUP it's not clear enough and seems to restrictive.
      This also will be discussed in the meeting in Manchester
       
    • 17:20 → 17:50
      RNTWG 30m

      Outreach
      - CHEP paper deadline was postpone to end of February 
      - IETF 

      Collectors
      - Missing Kafka input/output plugin (A: Andy Lake)
      - Meeting with GEANT planned on 23rd of January (to discuss potential Scitags collector @GEANT)

      RCS-IT Scitags
      - Meetings with ATLAS and LHCb to be scheduled

      flowd-go
      - Re-implementation of flowd service in Go language (by Pablo from UAM)
      - https://github.com/scitags/flowd-go
      - flowd-go evaluation/review (A: Marian, Tristan)

      2025 plan/objectives:
      - Production infrastructure for firefly collectors 
      - Full CERN T0 production sending fireflies (including default non-marked traffic)
      - Continous rollout of fireflies to all sites running supported storages (in collab. with the experiments)
      - Collaboration with ESnet High-Touch to showcase we mini-challenge
            - Understand how we can correlate scitags and high-touch and show benefits
       - Sites network profiling - potential benefit for sites deploying flowd/go
             - New data - will require some learning 
      - Production deployment of packet marking 
             - We have pre-production running at UCSD/NPR 
      - Improve our understanding of packet marking performance (flow label, ext. headers) - SC25 ?
           
      Topical meetings to be scheduled:
      - BBRv3 and packet pacing tests 


      AOB.

    • 17:50 → 17:55
      AOB 5m
    • 17:55 → 18:00
      Next meeting 5m

      Next meeting: 28th of Janaury