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François Tessier

@hephtaicie.bsky.social
363 followers 549 following 75 posts

Research Scientist at Inria Rennes 🇫🇷. #HPC, I/O, Storage. Recent focus on #SKA 🔭. French-Swiss, former ANL 🇺🇸 and @cscsch 🇨🇭. Father of one.

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Reposted by François Tessier
Fernanda Foertter @hpcprogrammer.bsky.social · 08/09/2026
Hey friends. I made public a tool I had been using for myself to keep up with what's happening in #HPC. It's called TheDailyFLOP.com Maybe it's also useful for you.
thedailyflop.com
The Daily Flop — flop around, find out
One page, one scan. Plain-language headlines and a single sentence of context on every chip, GPU, and HPC vendor announcement that matters today.
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Brice Goglin @bgoglin.bsky.social · 09/06/2026
#hwloc 2.14.0 is released. Big improvements for ARM hybrid CPU detection, and AMD GPU management. And many other fixes. #hpc #hardware #locality sympa.inria.fr/sympa/arc/hw...
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SNCS-FSU Inria @sncs-inria.bsky.social · 17/03/2026
L'Inria essaie de défendre le fait que la ZRR ne va pas impacter les libertés académiques et le fait de la pire manière possible : en disant que de toute façon les précaires n'y auraient pas le droit (aux libertés académiques) parce qu'elles ne sont pas en poste....
Est-ce que le dispositif a un impact sur l'autonomie de la démarche scientifique et la libre circulation des idées ?

L'autonomie de la démarche scientifique et la libre circulation des idées garantit aux chercheurs d'effectuer des travaux de recherche, de publier et d’exprimer des idées sans subir de pression, de censure ou de contrainte extérieure, à condition de respecter l’éthique, l’objectivité scientifiques et plus globalement les lois et règlements en vigueur.

Ces garanties protègent les chercheurs déjà recrutés ou investis officiellement de fonctions de recherche. Elles ne sont pas accordées aux candidats à un poste.

L’exclusion d’un candidat avant sa nomination ne constitue donc pas une atteinte à l'autonomie de la démarche scientifique, à la libre circulation des idées ou à la liberté académique, par construction.
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SNCS-FSU Inria @sncs-inria.bsky.social · 04/03/2026
C'est officiel, cette année il y aura donc plus de 240 candidatures au concours Chargé·e de Recherche Inria pour seulement 6 postes (Plus d'une vingtaine de postes avant 2017). Une catastrophe. Colère pour ces jeunes chercheur·euses.
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Sarah Neuwirth 🇪🇺👩🏼‍💻👩🏻‍🏫😄 @sneuwirth.bsky.social · 23/01/2026
📢 ISPDC 2026: Call for Papers, Posters, and Talks! 📢 I am happy to announce the 25th International Symposium on Parallel and Distributed Computing (ISPDC 2026) (July 1-3, Hamburg, Germany)! Submissions are due March 23, 2026 (AoE). Further info: indico.desy.de/e/ispdc2026 #HPC #supercomputing
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François Tessier @hephtaicie.bsky.social · 03/12/2025
📢 Call for Papers: 7th International Workshop on Extreme-Scale #Storage and #Analysis (ESSA 2026), held in conjunction with IPDPS (New Orleans, May 2026)! More info here: sites.google.com/view/essa-2026 #HPC #Cloud #IPDPS
7th Workshop on Extreme-Scale Storage and Analysis
Held in conjunction with IPDPS 2026, New Orleans, LA, USA

Paper submission deadline: January 23, 2026
Acceptance notification: February 25, 2026
Camera-ready deadline: March 6, 2026
Workshop date: May 26, 2026
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Animation Obsessive @ani-obsessive.bsky.social · 03/11/2025
It wasn't deep. It didn't have much to say. But Xiao Xiao inspired millions to try Flash animation for themselves. A Beijing artist made this series -- and turned stick fights into a phenomenon. We're exploring why and how he did it: animationobsessive.substack.com/p/when-stick...
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SNCS-FSU Inria @sncs-inria.bsky.social · 20/11/2025
La cour des comptes publie son rapport sur les agences de programme.
ccomptes.fr
Les agences de programmes
Depuis 2017, la France a cherché à développer une nouvelle modalité de financement de la recherche en déployant des programmes de « recherche dirigée », au sein des programmes d’investissements d’aven...
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Mark A. Hanson @hansonmark.bsky.social · 11/11/2025
We wrote the Strain on scientific publishing to highlight the problems of time & trust. With a fantastic group of co-authors, we present The Drain of Scientific Publishing: a 🧵 1/n Drain: arxiv.org/abs/2511.04820 Strain: direct.mit.edu/qss/article/... Oligopoly: direct.mit.edu/qss/article/...
A table showing profit margins of major publishers. A snippet of text related to this table is below.

1. The four-fold drain
1.1 Money
Currently, academic publishing is dominated by profit-oriented, multinational companies for
whom scientific knowledge is a commodity to be sold back to the academic community who
created it. The dominant four are Elsevier, Springer Nature, Wiley and Taylor & Francis,
which collectively generated over US$7.1 billion in revenue from journal publishing in 2024
alone, and over US$12 billion in profits between 2019 and 2024 (Table 1A). Their profit
margins have always been over 30% in the last five years, and for the largest publisher
(Elsevier) always over 37%.
Against many comparators, across many sectors, scientific publishing is one of the most
consistently profitable industries (Table S1). These financial arrangements make a substantial
difference to science budgets. In 2024, 46% of Elsevier revenues and 53% of Taylor &
Francis revenues were generated in North America, meaning that North American
researchers were charged over US$2.27 billion by just two for-profit publishers. The
Canadian research councils and the US National Science Foundation were allocated US$9.3
billion in that year.A figure detailing the drain on researcher time.

1. The four-fold drain

1.2 Time
The number of papers published each year is growing faster than the scientific workforce,
with the number of papers per researcher almost doubling between 1996 and 2022 (Figure
1A). This reflects the fact that publishers’ commercial desire to publish (sell) more material
has aligned well with the competitive prestige culture in which publications help secure jobs,
grants, promotions, and awards. To the extent that this growth is driven by a pressure for
profit, rather than scholarly imperatives, it distorts the way researchers spend their time.
The publishing system depends on unpaid reviewer labour, estimated to be over 130 million
unpaid hours annually in 2020 alone (9). Researchers have complained about the demands of
peer-review for decades, but the scale of the problem is now worse, with editors reporting
widespread difficulties recruiting reviewers. The growth in publications involves not only the
authors’ time, but that of academic editors and reviewers who are dealing with so many
review demands.
Even more seriously, the imperative to produce ever more articles reshapes the nature of
scientific inquiry. Evidence across multiple fields shows that more papers result in
‘ossification’, not new ideas (10). It may seem paradoxical that more papers can slow
progress until one considers how it affects researchers’ time. While rewards remain tied to
volume, prestige, and impact of publications, researchers will be nudged away from riskier,
local, interdisciplinary, and long-term work. The result is a treadmill of constant activity with
limited progress whereas core scholarly practices – such as reading, reflecting and engaging
with others’ contributions – is de-prioritized. What looks like productivity often masks
intellectual exhaustion built on a demoralizing, narrowing scientific vision.A table of profit margins across industries. The section of text related to this table is below:

1. The four-fold drain
1.1 Money
Currently, academic publishing is dominated by profit-oriented, multinational companies for
whom scientific knowledge is a commodity to be sold back to the academic community who
created it. The dominant four are Elsevier, Springer Nature, Wiley and Taylor & Francis,
which collectively generated over US$7.1 billion in revenue from journal publishing in 2024
alone, and over US$12 billion in profits between 2019 and 2024 (Table 1A). Their profit
margins have always been over 30% in the last five years, and for the largest publisher
(Elsevier) always over 37%.
Against many comparators, across many sectors, scientific publishing is one of the most
consistently profitable industries (Table S1). These financial arrangements make a substantial
difference to science budgets. In 2024, 46% of Elsevier revenues and 53% of Taylor &
Francis revenues were generated in North America, meaning that North American
researchers were charged over US$2.27 billion by just two for-profit publishers. The
Canadian research councils and the US National Science Foundation were allocated US$9.3
billion in that year.The costs of inaction are plain: wasted public funds, lost researcher time, compromised
scientific integrity and eroded public trust. Today, the system rewards commercial publishers
first, and science second. Without bold action from the funders we risk continuing to pour
resources into a system that prioritizes profit over the advancement of scientific knowledge.
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Suhaib Khan @suhaibkhan.bsky.social · 17/10/2025
Part 1 of the special HPCwire series about the future of #storage for #HPC and #AI lays out the current state of storage for AI and HPC and touches on some of the broad challenges that organizations are facing. www.hpcwire.com/2025/10/13/t...
hpcwire.com
The Future of Storage for HPC and AI
The AI arms race has made “GPU” and “gigawatt” household words, and for good reason: What’s happening with the scale of compute is unprecedented. But what about the underlying storage […]
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Torsten Hoefler 🇨🇭 @thoefler.bsky.social · 02/10/2025
Cool and impactful project led by the MPI-M: coupled simulation of the full Earth system in 1.25km resolution. Unprecedented complexity, fidelity, and performance at 82.5 simulated days per day. Accelerated by DaCe on GH200 - next generation #HPC for #climate science is here!
buff.ly
Global climate simulations achieve 1.25 km resolution—team nominated for Climate Gordon Bell Prize | CSCS
For the first time, scientists have run global coupled climate simulations at a resolution of just 1.25 kilometres. Using CSCS’s “Alps” supercomputer, the team including researchers from ETH Zürich…
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Astropierre @astropierre.com · 26/09/2025
126 millions de milliards d’opérations en virgule flottante par seconde : c’est la capacité du supercalculateur Jean Zay 4 depuis mai 2025. Une puissance énorme entièrement au service de la science. Reportage @cnrs.fr : www.youtube.com/watch?v=8Jdj...
youtube.com
Jean Zay 4 : Accélérer l'IA I Reportage CNRS
YouTube video by CNRS
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Glenn K. Lockwood @glennklockwood.com · 25/07/2025
I wrote up some notes on how to approach I/O and storage benchmarks in RFPs. I normally don't post here about updates to my digital garden, but I think this page is tidy and useful. www.glennklockwood.com/garden/bench... #HPC
glennklockwood.com
benchmarking
There are two ways to approach benchmarking. System-level capability: This tells you the best- and worst-case performance you can get out of the system regardless of whatever workload (or mix of workl...
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Sarah Neuwirth 🇪🇺👩🏼‍💻👩🏻‍🏫😄 @sneuwirth.bsky.social · 21/07/2025
📢 [FINAL] Call for Papers for the REX-IO 2025 Workshop! 📢 REX-IO 2025 is still accepting submissions (short & full papers) and your high-quality work can make a big difference! Final deadline: July 25, 2025 11:59PM AoE. 🤩 📜 🦖 More information: sites.google.com/view/rexio/ #HPC #supercomputing
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Drew Jolly @amjolly.bsky.social · 18/07/2025
Glenn Lockwood Joins VAST with Eye on Next-Gen AI Infrastructure Strategy ow.ly/flLQ50Ws29T #HPC #HPCwire
ow.ly
Glenn Lockwood Joins VAST with Eye on Next-Gen AI Infrastructure Strategy
July 18, 2025 — Editor’s Note: Glenn Lockwood, known for his work on Azure’s large-scale AI supercomputers and the Perlmutter supercomputer’s all-NVMe Lustre system, announced earlier this month he wa...
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François Tessier @hephtaicie.bsky.social · 04/06/2025
A global power outage during an ESSA workshop is not enough to stop us from sharing our work on I/O and Storage! #IPDPS25
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Sarah Neuwirth 🇪🇺👩🏼‍💻👩🏻‍🏫😄 @sneuwirth.bsky.social · 20/05/2025
📢 [CFP] REX-IO 2025 Workshop at IEEE Cluster Conference 2025! I'm happy to announce the 5th Workshop on Re-envisioning Extreme-Scale I/O for Emerging Hybrid HPC Workloads! Submissions are due July 9, 2025 (11:59PM AoE). 🤩 📜 🦖 Further info: sites.google.com/view/rexio/ #HPC #supercomputing
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Milène Testa-Rioux @milenerioux.bsky.social · 19/05/2025
🆕Comment simuler des phénomènes naturels complexes sur ordinateur pour les rendre compréhensifs et les étudier ?🔬 Au centre #Inria de l’ @univbordeaux.bsky.social : #modélisation, #data et #HPC s’unissent dans un #continuum scientifique puissant. 🔎Sur inria.fr : www.inria.fr/fr/modelisat...
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Au Poste @auposte.media · 04/05/2025
Au Poste, c’est vous. Sans vous, c’est silence radio. Aujourd’hui, nous avons besoin de vous pour notre chaine YouTube. Moins de 5000 followers manquent pour franchir un cap, trouver des appuis, tenir la ligne, et remplir les conditions pour demandes d'aides au CNC -> www.youtube.com/@au_poste?su...
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Glenn K. Lockwood @glennklockwood.com · 12/03/2025
Darshan now supports I/O profiling for (non-MPI) machine learning frameworks, and a new blog post explains how: www.mcs.anl.gov/research/projects/d… #HPC
mcs.anl.gov
Using Darshan with non-MPI applications (e.g., AI/ML frameworks) – Darshan
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Au Poste @auposte.media · 09/03/2025
Opération 50000 abonnés Youtube lancée: il nous manque 12.000 followers pour prétendre à traquer quelques menues aides financières ici ou là. Vous êtes 15000 ici à nous suivre sur BSKY. On serait tellement pas loin... youtube.com/@au_poste Merci de vous abonner à notre canal (gratuit)
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Ryohei Kobayashi @ryohei-kobayashi.bsky.social · 08/02/2025
🚀 𝐈𝐄𝐄𝐄 𝐂𝐥𝐮𝐬𝐭𝐞𝐫 𝟐𝟎𝟐𝟓 – 𝐂𝐚𝐥𝐥 𝐟𝐨𝐫 𝐏𝐚𝐩𝐞𝐫𝐬! 📢 Submission Deadline: April 25, 2025 📍 Location: Edinburgh, United Kingdom 📅 Dates: September 2-5, 2025 📢 The CFP is open! Submit your paper by April 25, 2025: clustercomp.org/2025/papers/
clustercomp.org
Welcome!
Website for IEEE Cluster 2025. The latest news is also shown in Twitter/ieeecluster
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François Tessier @hephtaicie.bsky.social · 31/01/2025
ECLAT, the Extreme Computing Lab for Astronomical Telescopes, now has an English website! eclat-lab.fr/en/ Next week will also be organized the first hackathon at the Paris Observatory. A great opportunity for the #HPC and #Astro communities to work together on scaling up #SKA processing pipelines.
eclat-lab.fr
Homepage - ECLAT
Introducing ECLAT, a laboratory of excellence dedicated to high-performance computing (HPC) and artificial intelligence (AI) for astronomical instrumentation. Created as a result of France's contribut...
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Nicolas Berrod @nicolasberrod.bsky.social · 27/01/2025
La communauté scientifique a massivement migré sur le ciel bleu, la preuve en chiffres : parmi 5 300 répondants à Nature... • 52,5 % ont quitté X • 14,9 % utilisent toujours X mais davantage Bsky • Seuls 13,6 % utilisent toujours davantage X que Bsky 1/3
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Stéphane @molloy.bsky.social · 28/01/2025
A review of the world scientific literature shows the number of supercomputer articles, growing rapidly after 1980. An Informal Survey of the Scientific and Social Impact of a Soda Can-Sized Super-Supercomputer doi: 10.1063/1.4822988 #supercomputer #HPC #retrocomputer #vintagecomputiong #research
Supercomputer articles. A review of the world scientific literature shows the number of supercomputer articles, growing rapidly after 1980.
1981 : 11
85 : 47
89 : 103
90 : 120
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François Tessier @hephtaicie.bsky.social · 23/01/2025
We have extended the deadline for ESSA! You still have a bit of time to submit your work on I/O, storage and data analytics at extreme scale, and join us in June in Milano, Italy. #HPC
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François Tessier @hephtaicie.bsky.social · 23/01/2025
Bye bye #PizDaint 🇨🇭. It was a real pleasure working with you for a while. #HPC
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seb(astien) @nseb.bsky.social · 23/01/2025
To kick start this account let's repost something I worked on last year at @epcc.bsky.social. Wind turbine flow simulation done with @xcompact3d.bsky.social by Andrew Mole and render and animation by me using @blender.org #hpc #blender #sc24 #cfd
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HPC Guru @hpcguru.bsky.social · 21/01/2025
Welcome to #BlueSky, @eurohpc-ju.bsky.social #HPC #AI
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Michael Papka @mpapka.bsky.social · 05/01/2025
The Argonne Leadership Computing Facility has released its 2024 Science report (bit.ly/3BTyEHW) highlighting some of the work of our great users. #hpc
alcf.anl.gov
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David Monniaux @monniauxd.bsky.social · 03/01/2025
(This is mostly for young academics, though science journalists might find it interesting.) I often receive suspicious advertisements about scientific journals and conferences. Why do I consider them suspicious?
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François Tessier @hephtaicie.bsky.social · 21/12/2024
Today, we present our work on simulation of #HPC storage systems at HiPC, India, ... remotely! I didn't get my visa on time, and had to give up boarding 1 hour before departure while standing in front of the check-in desk. Not my best travel experience, I have to say 😅
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v @vsoch.bsky.social · 09/12/2024
We are pleased to announce an #IEEE Computing in Science and Engineering (CiSE) Special Issue on Converged Computing! ☁️ www.computer.org/csdl/magazin... Discussion of the best of both worlds, #cloud and #HPC, on the level of technology and culture, is of utmost importance.
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François Tessier @hephtaicie.bsky.social · 06/12/2024
A priceless quote from @sneuwirth.bsky.social's talk today at the Inria center in Rennes: "Benchmarking can be benchmarketing at times". I think I'm going to frame it for my office 😅
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François Tessier @hephtaicie.bsky.social · 06/12/2024
Today is the Day! Julien Monniot, my first PhD student, is defending his PhD entitled "Enabling Accurate Simulation of #HPC Storage Systems: Methodology and Practical Techniques". So proud of him!
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David Ho @davidho.bsky.social · 29/11/2024
Ahem…do y'all know about sci-hub? 🌊🧪 sci-hub.se
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François Tessier @hephtaicie.bsky.social · 28/11/2024
Enter the Matrix.
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François Tessier @hephtaicie.bsky.social · 28/11/2024
Lots of newcomers to the #HPC community on Bluesky! I am therefore taking this opportunity to repost our CFP for the ESSA workshop which will be organized jointly with IPDPS next June. ESSA is dedicated to I/O challenges, storage management and analysis of large volumes of data.
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François Tessier @hephtaicie.bsky.social · 27/11/2024
HPE/Cray recently open the source code of the support library for Slingshot network (github.com/HewlettPacka...). Thanks to a Guix-HPC package, it's now possible to seamlessly deploy a Slingshot-capable MPI stack with performance on par with native MPI! #HPC hpc.guix.info/blog/2024/11...
hpc.guix.info
Guix-HPC — Targeting the Cray/HPE Slingshot interconnect
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François Tessier @hephtaicie.bsky.social · 27/11/2024
Today starts the first technical workshop of the Extreme Computing Laboratory for Astronomical Telescopes (ECLAT) in Bordeaux, France. Several of us will take turns to present our work on the very large-scale transition of SKA's operational workflow. #HPC 🖥️ and #radioastronomy 🔭 on the program 😎
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François Tessier @hephtaicie.bsky.social · 25/11/2024
I'm launching the hashtag #HPCTales to share ridiculous articles about #HPC. I'm starting with news from a French defense (!!) website that headlines: "The 2nd most powerful supercomputer in the world (Frontier) is now able to create its own Matrix-like universe thanks to Exascale" 🤦
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François Tessier @hephtaicie.bsky.social · 22/11/2024
We had a great program this morning at the #SC24 SuperCompCloud workshop ranging from cloud-based software ecosystem for radioastronomy workload to open platform for micro-services deployment. See you (hopefully) next year for SC25 😎
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François Tessier @hephtaicie.bsky.social · 22/11/2024
Even after living in the US for three years, one mystery remains: chicken and waffles. Why guys?! #SC24
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François Tessier @hephtaicie.bsky.social · 21/11/2024
⚠️ If you plan to attend the #SC24 reception tonight at the Aquarium, drop off your backpack beforehand! I just got that info from a SC Organizing Committee member. It will be way more complicated to get in with a bag. The Aquarium staff insisted a lot on that point during a meeting today.
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François Tessier @hephtaicie.bsky.social · 21/11/2024
Best #SC24 party though. Or should I say "best accelerated party"?
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François Tessier @hephtaicie.bsky.social · 21/11/2024
Everything is "accelerated" at Weka. They got a discount on the word. #SC24
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Sunita Chandrasekaran @sunitachandra.bsky.social · 20/11/2024
We are hiring!!! #RSE #SC24 #HPC #UDEL 🥁 🥁 🥁 🥁 🥁 careers.udel.edu/cw/en-us/job... Here you go with a project summary - www.udel.edu/udaily/2024/... #NSF Democratizing access to #RSE DARSE sites.udel.edu/darse/ #NSF SCIPE award www.nsf.gov/awardsearch/...
udel.edu
Building a data-intensive research workforce for the Mid-Atlantic | UDaily
University of Delaware program to create pipeline for new professionals
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François Tessier @hephtaicie.bsky.social · 19/11/2024
Marketing is getting out of control this year at the #SC24 exhibition! Everything is AI-enabled. I saw AI-ready network cables or AI-compatible cooling systems to name a few. I find it a bit AI-ridiculous.
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François Tessier @hephtaicie.bsky.social · 19/11/2024
Attending a nice #SC24 talk about managing I/O interference on supercomputers. However, the authors claim that part of the interference is due to non-exclusive node allocation. My experience with large-scale #HPC systems is that nodes are largely allocated exclusively. Thoughts?
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