#isc25 — Public Fediverse posts

My keynote talk at #IXPUG #ISC25 is finally online! 🖖🤠
GigaScale #FluidX3D #CFD Simulations from Communication and IO Perspective
https://www.youtube.com/watch?v=uAIkpcX5EFc&list=PLA-vfTt7YHI2HEFrpzPhhQ8PhiztKhHU8

#ISC25 Interview: What Keeps Satoshi Matsuoka Up at Night? www.hpcwire.com/2025/07/18/i... #HPC #AI

ISC 2025 Interview: What Keeps...

Scott Atchley, who co-keynoted #ISC25, posted a really meaningful response to my ISC25 recap blog post on LinkedIn (https://www.linkedin.com/posts/scottatchley_isc25-olcf-frontier-activity-7345786995765395457-lGoq). He specifically offered additional perspective on the 20 MW exascale milestone and the pitfalls of Ozaki. It's short but very valuable context.

#HPC

Honored to be #ISC25 Research Paper Chair (with Vice Chair Hatem Ltaief)! Proud of our strong program, record 3,585 attendees, quantum insights, & HPC truly is the engine of AI. Bring on ISC26!

Looking at the Top500 list from #ISC25, it looks like JUPITER ran HPL with 5,884 nodes--perhaps the full system (advertised as "roughly 6,000" nodes).The run only hit ~33 TF/H200 tho; by comparison, Isambard-AI hit 43 TF/H200. If JUPITER can get up to 43 TF/GPU, it should post at 1.01 EF FP64. #HPC

For most that missed the #ISC25 Flux Framework Tutorial, we just posted our slides online:

https://github.com/flux-framework/Tutorials/blob/master/2025-ISC-AWS/Flux-ISC-2025.pdf

Thank you to those that attended, and see you next time! 👋

What an amazing exhibition experience last week was! 😀 ISC High Performance was an adventure, and we are delighted that we were able to welcome visitors not only at our joint GCS stand, but also at our⚡JUPITER booth. 💪 Find out all about our experiences, activities and successes right here: https://www.fz-juelich.de/en/ias/jsc/news/news-items/news-flashes/2025/isc25-action-packed-days-dedicated-to-jupiter-quantum-power-and-networking
#ISC25! #JUPITER #HPC #Supercomputing #Quantumcomputing #FZJ

Our reflections from #ISC25 are live.

From standout sessions to big-picture trends and community moments (including our Roco casting a few spells), we’ve pulled together the key takeaways from Hamburg in our latest blog by Muneeb Khan, Senior HPC Managed Services Specialist.

📬 Read here: https://www.redoakconsulting.co.uk/blog/postcards-from-isc-2025/

#ISC#HPC #Supercomputing

The #isc25 is over and I half-recovered from the weekend, too. Time to continue my thread summing up the #SnakemakeHackathon2025 !

To me, an important contribution was from Michael Jahn from the Charpentier Lab: A complete re-design of the workflow catalogue. Have a look: https://snakemake.github.io/snakemake-workflow-catalog/ - findability of ready-to-use workflows has greatly improved! Also, the description on how to contribute is now easy to find.

A detailed description has been published in the #researchequals collection https://www.researchequals.com/collections/hm1w-cg under https://doi.org/10.5281/zenodo.15574642

#Snakemake #ReproducibleComputing #ReproducibleResearch #OpenScience

Wir sind noch ganz im Zeichen der #ISC25 und haben diesen Artikel über die Entwicklung von Rechenkraft gefunden: Selbst mit Beschleunigern und anderen Acceleratoren ist das #MoorschesGesetz nicht mehr zu schaffen. Bis vor einigen Jahren konnte Rechenkraft noch in etwa zwei Jahren verdoppelt werden. Die Architektur fürs Supercomputing muss auch für eine nachhaltige Energienutzung komplexer, heterogener geplant werden. https://www.nextplatform.com/2025/06/10/top500-supers-even-accelerators-cant-bend-performance-up-to-the-moores-law-line/

#IT4Science

I ended up presenting five distinct slidedecks at #ISC25. If I find time, about what should I blog?
Here are title slides. Luckily, I needed to use PowerPoint only once 😊.

If you missed the #FluxFramework tutorial at #ISC25, have no fear! We have a little portion to share. Learn more about Flux Environments:

https://bsky.app/profile/vsoch.bsky.social/post/3lrj2y7w7gk2f

@AlanSill

Oh? Bookmark set. I am currently travelling by train. Back from #isc25 . Yet, always eager to learn something new.

#HPC Hallway Huddle alert! ~2 hours to next #hpc-huddle! Will we have lots of news from #ISC25 and other happenings this past week? Join to find out! https://hpc-hallway.github.io/The-Hallway/

Interesting take from an #Nvidia engineer I met at #ISC25: "Do you need IEEE-754 compliant #FP64, or do you need digits? Digits we can get you through FP64 emulation."

Not sure what to make of that. Things were an absolute mess before the IEEE-754 standard, and I wouldn't want to ever go back to that. No standards means you cannot at all port software between hardware architectures even from within the same vendor. Having to re-architect software for each and every new chip is not gonna happen.

🚀 Keynote talk "Exascale in Europe and Beyond" at the workshop "#HPC on Heterogeneous #Hardware (H3)".
The workshop provides a platform for novel work in algorithmic research, software library design, programming models, and workflow development.
#ISC25
https://icl.utk.edu/~luszczek/conf/2025/h3/

⚡ Workshop: Efficient Distributed #GPU #Programming for Exascale
Learn to efficiently program large-scale multi-GPU systems. Besides #MPI, also advanced tuning techniques and complementing programming models like NCCL and NVSHMEM are presented.
#ISC25
https://isc.app.swapcard.com/widget/event/isc-high-performance-2025/planning/UGxhbm5pbmdfMjU4MTc5Ng==

📈Join the 2nd Workshop on Readiness of HPC Extreme-Scaling Applications
This workshop provides a forum to discuss common challenges, ideas, solutions, & opportunities from the point of view of #HPC #applications developers preparing for exa-scale.
#ISC25
https://isc.app.swapcard.com/widget/event/isc-high-performance-2025/planning/UGxhbm5pbmdfMjU4MTc0Nw==

🔬 Workshop: Research Software Engineering in High-Performance Computing - Tools and Techniques for Continuous Integration and Benchmarking (CI/CB)
Impact, usages, and implementations of #CI and #CB for heterogeneous, extreme-scale #HPC systems.
#ISC25
https://isc.app.swapcard.com/widget/event/isc-high-performance-2025/planning/UGxhbm5pbmdfMjU4MTc1Mg==

Returning from the #isc25 I will continue this thread with something applicable everywhere, not just on #HPC clusters:

Workflow runs can crash. There are a number of possible reasons. Snakemake offers a `--rerun-incomple` flag (or short `--ri`) which lets a user resume a workflow.

This contribution from Filipe G. Viera describes a small fix to stabilize the feature. Not only will incomplete files be removed after a crash, now it is ensured that all metadata with them are deleted too, before resuming: https://zenodo.org/records/15490098

#Snakemake #SnakemakeHackathon2025 #ReproducibleComputing #OpenScience

Waiting for my train and going through slides of a BOF from the #isc25 . Apparently, students prefer tutored online courses.

I as a lecturer always prefer onsite courses. Spiced with lots of exercises. Such that I get an immediate impression of proceedings and reception of the material.

Yes, I understand the need-to-travel overhead when living in somewhat remote areas. On the other hand: All those demanding online or even hybrid courses - have you considered that the average participant might learn less? The literature supporting online courses at least is rather underwhelming.

Plus, actually meeting people is way better than chatting online. Same with conferences. I just me people from @SURF and other places whom I only met online before. Such a difference!

Then again, I only travel by train - which cannot expected by everyone ...

#online vs. #onsite #teaching #conferences #AcademicChatter

Impressionen und ein kurzes Fazit zur #ISC25 in #Hamburg
🚀 Selbst mit Acceleratoren ist das Moore'sche Gesetz nicht mehr zu schaffen. Mehr Rechenleistung ist schwer aufzubauen.
🚀 Beschleunigung basiert nicht nur auf GPU, Q.ANTaus #Stuttgart interessante photonische Lösungen
🚀 Forschung mit HPC braucht oft auch Visualisierung
🚀 Quantum etabliert sich im HPC
🚀 Quantum und AI rücken näher zusammen und befeuern sich gegenseitig.
Es bleibt spannend.

@tu_muenchen , @CAS_LMU @lmu_osc

#IT4Science

#ISC25 #Intel IXPUG let's gooooo! 🖖🧐

👩‍💻 PPP 01: First Workshop on the Pain of #ParallelProgramming
Application people share their pain in programming parallel systems with people working on frameworks and models. The goal is to gain insights and find solutions to alleviate the pain.
#ISC25
https://isc.app.swapcard.com/widget/event/isc-high-performance-2025/planning/UGxhbm5pbmdfMjU4MTc1OA

🤖 Join Marcel Aach's talk today on "Optimizing Edge AI Models on HPC Systems with the Edge in the Loop" at the 5th International Workshop on Computational Aspects of Deep Learning
#ISC25
https://isc.app.swapcard.com/widget/event/isc-high-performance-2025/planning/UGxhbm5pbmdfMjU4MTc2MQ==

📈Tutorial: Determining Parallel Application Execution Efficiency and Scaling using the POP Methodology
#HPC application developers gain the methodology to locate and diagnose efficiency & scalability issues in their parallel application codes.
#ISC25
➡️ https://isc.app.swapcard.com/widget/event/isc-high-performance-2025/planning/UGxhbm5pbmdfMjU4MTgwMQ==

We will participate in a variety of exciting events on the last day of #ISC25, Friday, June 13 – stop by & join the discussion https://go.fzj.de/isc25
Workshops, talks & tutorials on #EdgeAI🤖, #Benchmarking📏, #ParallelProgramming👩‍💻, #GPUProgramming, & the future of #Exascale⚡.

Oh! Here at the #isc25 I noticed, I got my first #nanopub PR merged: https://github.com/Nanopublication/nanopub-py/pull/193 🥳

#ReproducibleResearch

Questions to HPC technology are raising at #ISC25 Is AI replacing HPC? What does it mean for new Supercomputers in Germany? Dieter Kranzlmueller from LRZ and GCS, explains why technical diversity is a winning factor: "Each centre follows a complementary strategy in designing computing architectures, so the 3 supercomputers can demonstrate strengths in different tasks. We are discussing, whether large CPU resources will continue to be provided at the GCS centres." https://tiny.badw.de/raLviY