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WLCG Technical Coordination Board #7

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Live Notes
WLCG TCB
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68881153582
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James Letts
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Live Notes for WLCG TCB#7 on Tuesday, February 24, 2025 at 15:00 (CERN)

 

Indico: https://indico.cern.ch/event/1649097/



Attending: Ale Di Girolamo, James Letts, Johannes Elmsheuser, Latchezar Betev, Oxana Smirnova, Shawn McKee, Maarten Litmaath, Andrew Melo, Marco Mascheroni, Federico Stagni, Phat Srimanobhas, David South, Alessandro De Salvo, Stephan Lammel, José Carlos Luna, Eduardo Martelli, Alistair Dewhurst, Edward Moyse, Liz Sexton-Kennedy, 

 

Reference Document: 250623 - Possible TR Chapter Facilitators

 

 

The main focus of this OTF#7 are organizational around the WLCG Technical Roadmap, defining the timeline for producing drafts of each chapter.

 

Introduction

Details on various Chapters.

Chapter #1: 

  • CMS plots are already publicly available, 

  • ATLAS: tentative date by June LHCC, it might be possible to have the plots for CHEP26

Chapter #2 and #5:

  • Discussed the HEPiX organization, and main goals

  • Anyone volunteering for the OTF#7 Heterogeneous Architecture meeting in HEPiX is welcome.

  • From Pepe: a draft has now started, in the common folder.

  • About the HEPiX session, Pepe can chair and can also volunteer (as last resort). Remote connection will be possible. ⇒ TCB members are encouraged to propose names

Chapter #7:

  • WLCG services, focus of OTF#9 March 24 and 25

Chapter #9:

  • We need to reach out to the WLCG Sustainability wg group. 

Chapter #6:

  • Tokens: it has an already existing draft, 7 pages. Maarten will review  it, slightly shrink it down, but it is a solid draft already.

Questions for TCB

  • How to proceed with synthesizing the draft

  • Track progress: 

    • Maarten proposed we need a couple of checkpoints per year, with official documents, to report about the evolution of the status.

    • Latchezar pointed out that we need to have the “validity” of the document, could it be the start of Run4. Document might need several updates

    • Risk and mitigation will be in each chapters

    • Maarten mentioned also that there might be the need of “scenarios” (planB) if things do not happen.

TDR Timeline

ATLAS pointed out that it is complex having the same experts working on both the ATLAS TDR and the WLCG Technical Roadmap. It was mentioned that both the ATLAS TDR and the WLCG Technical Roadmap will be reviewed by LHCC in ~ November, thus we need to do as we can. It might be that by CHEP we will have to mention that for some of the chapters we have concrete ideas, but we need still some input and alignment.

Chapter 5 - Workflow Management - Marco Mascheroni

 

Q&A:

  • Relationship with Job Allocations and Handling TF: https://indico.cern.ch/event/1595858/#5-extension-of-the-mandate-of

  • Maarten: also this chapter will aim at ~5pages. Sustainability should also be included, a few sentences.

  • AndrewMelo: the way in which we schedule resources is important.

  • Maarten mentioned that K8s is great, but we are a very variegated community, not many sites will move now. WLCG WM systems need to be able to connect to such systems, though we are not asking sites to change, clearly not.

  • Federico Stagni asks about connections between WM and information systems (Ch. 7). This could be discussed in OTF#9 in March. Panos is not here today.

  • Some of the milestones will be answers to open questions we have today. Scheduling a decision point in the future is a valid milestone.

  • Latchezar: the focus could be the different access to the different kinds of resources.



Next meeting in 4-5 weeks. At the next meeting, should we have more advanced drafts? Ready for reading? Please communicate with Ale and James directly in the next weeks as drafts are ready.

 

Meeting time: 1h14

 

 

 






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