#ISC25

2025-07-02

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

#HPC

2025-06-18

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

vsochvsoch
2025-06-18

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

github.com/flux-framework/Tuto

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

2025-06-17

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: fz-juelich.de/en/ias/jsc/news/
#ISC25! #JUPITER #HPC #Supercomputing #Quantumcomputing #FZJ

Red Oak ConsultingRedOakConsulting
2025-06-16

Our reflections from 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: redoakconsulting.co.uk/blog/po

#HPC

Christian Meestersrupdecat@fediscience.org
2025-06-16

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: snakemake.github.io/snakemake- - 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 researchequals.com/collections under doi.org/10.5281/zenodo.1557464

#Snakemake #ReproducibleComputing #ReproducibleResearch #OpenScience

Leibniz Supercomputing CentreLRZ_DE
2025-06-16

Wir sind noch ganz im Zeichen der und haben diesen Artikel über die Entwicklung von Rechenkraft gefunden: Selbst mit Beschleunigern und anderen Acceleratoren ist das 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. nextplatform.com/2025/06/10/to

Andreas Hertenandih
2025-06-13

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

Carsten Spillecsp@social.heise.de
2025-06-13

Dr. Lin Gan von der chinesischen Tsinghua University zitierte auf der #isc25 in Hamburg Forschungsergebnisse mit Skalierung bis zu 41 Millionen Cores. In den Papers ist von 107520 Nodes die Rede, macht 390 Cores pro Node auf einem (Nach-)Nachfolger des Sunway Taihu Light Supercomputers. Der steht mit rund 93 PFLOPS aus 10,6 Mio. Kernen derzeit auf Platz 21 der Top500.

vsochvsoch
2025-06-13

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

bsky.app/profile/vsoch.bsky.so

Christian Meestersrupdecat@fediscience.org
2025-06-13

@AlanSill

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

2025-06-13

#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! hpc-hallway.github.io/The-Hall

2025-06-13

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.

Red Oak ConsultingRedOakConsulting
2025-06-13

That’s a wrap on ! 🙌

It’s been a fantastic few days connecting with the HPC community, sharing ideas, and celebrating 40 years of ISC. Huge thanks to the organisers and to everyone who stopped by to chat with us.

See you next year!

2025-06-13

🚀 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
icl.utk.edu/~luszczek/conf/202

2025-06-13

âš¡ 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
isc.app.swapcard.com/widget/ev==

2025-06-13

📈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
isc.app.swapcard.com/widget/ev==

2025-06-13

🔬 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
isc.app.swapcard.com/widget/ev==

Christian Meestersrupdecat@fediscience.org
2025-06-13

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: zenodo.org/records/15490098

#Snakemake #SnakemakeHackathon2025 #ReproducibleComputing #OpenScience

Christian Meestersrupdecat@fediscience.org
2025-06-13

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

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