Marc Joos
@marcjoos.bsky.social
Studied borning stars (astro PhD), worked on big computers (HPC @CEA). Solutions architect @NVIDIA. Ally (gender equality supporter). Free software enthusiast. Listen to music (loud & dissonant). Guitar player. Born @347ppm. En/Fr. He/him. Views are my own
Pinned
Marc Joos
@marcjoos.bsky.social
· Apr 28
GitHub - cea-hpc/wi4mpi: Wrapper interface for MPI
Wrapper interface for MPI. Contribute to cea-hpc/wi4mpi development by creating an account on GitHub.
github.com
Today we released the latest version of #Wi4MPI that includes major changes, in particular in the internals of the library. It doesn't change much for the users but it has a huge impact on the flexibility, versatility and robustness of the library.
github.com/cea-hpc/wi4mpi
#HPC #MPI
github.com/cea-hpc/wi4mpi
#HPC #MPI
Reposted by Marc Joos
By annual tradition, the HPC, Big Data, and Data Science devroom will be part of FOSDEM again next year (Sat-Sun 31 Jan + 1 Feb 2026 in Brussels). \o/
Please help us spread the word, and/or submit a talk proposal by 1 Dec 2025.
All details available via hpc-bigdata-fosdem26.github.io 🍻
Please help us spread the word, and/or submit a talk proposal by 1 Dec 2025.
All details available via hpc-bigdata-fosdem26.github.io 🍻
FOSDEM'26 HPC, Big Data, and Data Science Devroom
FOSDEM'26 HPC, Big Data, and Data Science Devroom
hpc-bigdata-fosdem26.github.io
November 5, 2025 at 4:59 PM
By annual tradition, the HPC, Big Data, and Data Science devroom will be part of FOSDEM again next year (Sat-Sun 31 Jan + 1 Feb 2026 in Brussels). \o/
Please help us spread the word, and/or submit a talk proposal by 1 Dec 2025.
All details available via hpc-bigdata-fosdem26.github.io 🍻
Please help us spread the word, and/or submit a talk proposal by 1 Dec 2025.
All details available via hpc-bigdata-fosdem26.github.io 🍻
Reposted by Marc Joos
Deadline for submissions for the 11th #hpc, #bigdata, and #datascience devroom at #fosdem26 (Brussels, Sat-Sun 31 Jan + 1 Feb 2026) is Mon 1 Dec 2025. Please see details at the link below. Looking forward to another dynamic, exciting, packed session! https://hpc-bigdata-fosdem26.github.io/
FOSDEM'26 HPC, Big Data, and Data Science Devroom
FOSDEM'26 HPC, Big Data, and Data Science Devroom
hpc-bigdata-fosdem26.github.io
November 12, 2025 at 4:33 PM
Deadline for submissions for the 11th #hpc, #bigdata, and #datascience devroom at #fosdem26 (Brussels, Sat-Sun 31 Jan + 1 Feb 2026) is Mon 1 Dec 2025. Please see details at the link below. Looking forward to another dynamic, exciting, packed session! https://hpc-bigdata-fosdem26.github.io/
Reposted by Marc Joos
Mathematician Karl Weierstrass was born #OTD, Halloween, in 1815. 🧪 🎃
The fools at The Academy all said he was mad, but he showed them all in 1872 when he announced that he had created a MONSTER. Let's learn about the terrible thing he did.
Image: Smithsonian Institution Libraries
The fools at The Academy all said he was mad, but he showed them all in 1872 when he announced that he had created a MONSTER. Let's learn about the terrible thing he did.
Image: Smithsonian Institution Libraries
October 31, 2025 at 5:04 PM
Mathematician Karl Weierstrass was born #OTD, Halloween, in 1815. 🧪 🎃
The fools at The Academy all said he was mad, but he showed them all in 1872 when he announced that he had created a MONSTER. Let's learn about the terrible thing he did.
Image: Smithsonian Institution Libraries
The fools at The Academy all said he was mad, but he showed them all in 1872 when he announced that he had created a MONSTER. Let's learn about the terrible thing he did.
Image: Smithsonian Institution Libraries
Reposted by Marc Joos
💥Spack v1.0 is out!💥
This is a huge milestone. We reworked the core to add compiler dependencies, and we're introducing a stable package API.
🚀1.0 also adds concurrent builds, better includes, and much more -- read it all in the release notes!
github.com/spack/spack/...
This is a huge milestone. We reworked the core to add compiler dependencies, and we're introducing a stable package API.
🚀1.0 also adds concurrent builds, better includes, and much more -- read it all in the release notes!
github.com/spack/spack/...
github.com
July 20, 2025 at 10:45 AM
💥Spack v1.0 is out!💥
This is a huge milestone. We reworked the core to add compiler dependencies, and we're introducing a stable package API.
🚀1.0 also adds concurrent builds, better includes, and much more -- read it all in the release notes!
github.com/spack/spack/...
This is a huge milestone. We reworked the core to add compiler dependencies, and we're introducing a stable package API.
🚀1.0 also adds concurrent builds, better includes, and much more -- read it all in the release notes!
github.com/spack/spack/...
Reposted by Marc Joos
"HPC Finally Found Its Killer App -- Can It Survive?" My views in HPCwire.
#HPC #AI
www.hpcwire.com/2025/06/06/h...
#HPC #AI
www.hpcwire.com/2025/06/06/h...
HPC Finally Found Its Killer App – Can It Survive?
Where We Are: On June 3, Intersect360 Research released our most recent market numbers for the HPC market. At the top level, things look great. We found a 24.1% growth […]
www.hpcwire.com
June 6, 2025 at 8:41 PM
"HPC Finally Found Its Killer App -- Can It Survive?" My views in HPCwire.
#HPC #AI
www.hpcwire.com/2025/06/06/h...
#HPC #AI
www.hpcwire.com/2025/06/06/h...
Reposted by Marc Joos
🚨 Last call! Our next EUPEX webinar is tomorrow!
Join Aurélien Cedeyn (CEA) as he presents OCEAN, the admin software stack used in production for HPC cluster management.
📅 June 4, 11 AM CEST
🔗 Register: us06web.zoom.us/meeting/regi...
#HPC #Webinar
Join Aurélien Cedeyn (CEA) as he presents OCEAN, the admin software stack used in production for HPC cluster management.
📅 June 4, 11 AM CEST
🔗 Register: us06web.zoom.us/meeting/regi...
#HPC #Webinar
June 3, 2025 at 10:02 AM
🚨 Last call! Our next EUPEX webinar is tomorrow!
Join Aurélien Cedeyn (CEA) as he presents OCEAN, the admin software stack used in production for HPC cluster management.
📅 June 4, 11 AM CEST
🔗 Register: us06web.zoom.us/meeting/regi...
#HPC #Webinar
Join Aurélien Cedeyn (CEA) as he presents OCEAN, the admin software stack used in production for HPC cluster management.
📅 June 4, 11 AM CEST
🔗 Register: us06web.zoom.us/meeting/regi...
#HPC #Webinar
Reposted by Marc Joos
I worked at the Living Computer Museum from 2014 until it closed due to Covid (and then never reopened because Paul Allen did a shitty job with his estate planning.) It's been a bit over 5 years since the museum closed to the public and I thought I'd share some pictures I took around that time.
April 2, 2025 at 3:39 AM
I worked at the Living Computer Museum from 2014 until it closed due to Covid (and then never reopened because Paul Allen did a shitty job with his estate planning.) It's been a bit over 5 years since the museum closed to the public and I thought I'd share some pictures I took around that time.
BlueSky: Attack of the Clones
The one with Jango Fett was more entertaining!
The one with Jango Fett was more entertaining!
May 2, 2025 at 10:09 PM
BlueSky: Attack of the Clones
The one with Jango Fett was more entertaining!
The one with Jango Fett was more entertaining!
Today we released the latest version of #Wi4MPI that includes major changes, in particular in the internals of the library. It doesn't change much for the users but it has a huge impact on the flexibility, versatility and robustness of the library.
github.com/cea-hpc/wi4mpi
#HPC #MPI
github.com/cea-hpc/wi4mpi
#HPC #MPI
GitHub - cea-hpc/wi4mpi: Wrapper interface for MPI
Wrapper interface for MPI. Contribute to cea-hpc/wi4mpi development by creating an account on GitHub.
github.com
April 28, 2025 at 4:21 PM
Today we released the latest version of #Wi4MPI that includes major changes, in particular in the internals of the library. It doesn't change much for the users but it has a huge impact on the flexibility, versatility and robustness of the library.
github.com/cea-hpc/wi4mpi
#HPC #MPI
github.com/cea-hpc/wi4mpi
#HPC #MPI
Reposted by Marc Joos
🚨 Last call! Our next EUPEX webinar is tomorrow!
Join Aurélien Cedeyn (CEA) as he presents OCEAN, the admin software stack used in production for HPC cluster management.
📅 April 9, 11 AM CEST
🔗 Register: us06web.zoom.us/meeting/regi...
#HPC #Webinar
Join Aurélien Cedeyn (CEA) as he presents OCEAN, the admin software stack used in production for HPC cluster management.
📅 April 9, 11 AM CEST
🔗 Register: us06web.zoom.us/meeting/regi...
#HPC #Webinar
April 8, 2025 at 7:02 PM
🚨 Last call! Our next EUPEX webinar is tomorrow!
Join Aurélien Cedeyn (CEA) as he presents OCEAN, the admin software stack used in production for HPC cluster management.
📅 April 9, 11 AM CEST
🔗 Register: us06web.zoom.us/meeting/regi...
#HPC #Webinar
Join Aurélien Cedeyn (CEA) as he presents OCEAN, the admin software stack used in production for HPC cluster management.
📅 April 9, 11 AM CEST
🔗 Register: us06web.zoom.us/meeting/regi...
#HPC #Webinar
Reposted by Marc Joos
EasyBuild now has a blog!
blog.easybuild.io
First post is a report on the 10th EasyBuild User Meeting (EUM'25) -> blog.easybuild.io/2025/03/28/e...
#HPC
blog.easybuild.io
First post is a report on the 10th EasyBuild User Meeting (EUM'25) -> blog.easybuild.io/2025/03/28/e...
#HPC
EasyBuild blog
blog.easybuild.io
April 8, 2025 at 7:23 PM
EasyBuild now has a blog!
blog.easybuild.io
First post is a report on the 10th EasyBuild User Meeting (EUM'25) -> blog.easybuild.io/2025/03/28/e...
#HPC
blog.easybuild.io
First post is a report on the 10th EasyBuild User Meeting (EUM'25) -> blog.easybuild.io/2025/03/28/e...
#HPC
Reposted by Marc Joos
If you are interested in running #HPC apps in cloud with #Kubernetes "Trends for Pulling HPC Containers in Cloud" - a look at the ecosystem since 2014 and a robust pulling study - is published this week at Cloud Computing 2025. It is work driven by my love and curiosity of container technologies. ❤️
ThinkMind(TM) Digital Library
www.thinkmind.org
April 7, 2025 at 12:42 AM
If you are interested in running #HPC apps in cloud with #Kubernetes "Trends for Pulling HPC Containers in Cloud" - a look at the ecosystem since 2014 and a robust pulling study - is published this week at Cloud Computing 2025. It is work driven by my love and curiosity of container technologies. ❤️
Reposted by Marc Joos
Kicking off day two of the 10th EasyBuild User Meeting at Jülich Supercomputing Centre (JSC) with a keynote by Jeff Hammond (NVIDIA)
Live stream via www.youtube.com/watch?v=2-4p...
Slides will be made available via easybuild.io/eum25/#program
@fzj-jsc.bsky.social #HPC
Live stream via www.youtube.com/watch?v=2-4p...
Slides will be made available via easybuild.io/eum25/#program
@fzj-jsc.bsky.social #HPC
March 26, 2025 at 8:13 AM
Kicking off day two of the 10th EasyBuild User Meeting at Jülich Supercomputing Centre (JSC) with a keynote by Jeff Hammond (NVIDIA)
Live stream via www.youtube.com/watch?v=2-4p...
Slides will be made available via easybuild.io/eum25/#program
@fzj-jsc.bsky.social #HPC
Live stream via www.youtube.com/watch?v=2-4p...
Slides will be made available via easybuild.io/eum25/#program
@fzj-jsc.bsky.social #HPC
Very nice to see French #QuantumComputing companies (Pasqal and Alice & Bob) on stage at #GTC25, we do indeed have a very exciting quantum ecosystem here!
And if you're an EU researcher, a Pasqal QPU will soon be available at @cea.fr TGCC!
And if you're an EU researcher, a Pasqal QPU will soon be available at @cea.fr TGCC!
March 20, 2025 at 10:15 PM
Very nice to see French #QuantumComputing companies (Pasqal and Alice & Bob) on stage at #GTC25, we do indeed have a very exciting quantum ecosystem here!
And if you're an EU researcher, a Pasqal QPU will soon be available at @cea.fr TGCC!
And if you're an EU researcher, a Pasqal QPU will soon be available at @cea.fr TGCC!
That's big news for France as the AI2F consortium is one of the #AIFactories selected. It strengthens the AI dimension of Alice Recoque, the EuroHPC exascale system deployed in France at @cea.fr, and it will help to foster & support an already very lively AI ecosystem in France
#HPC #AI #Europe
#HPC #AI #Europe
News Flash! ⚡
The @eurohpc-ju.bsky.social has selected #six new #AIFactories to strengthen Europe's #AI leadership! 🌍
Austria, Bulgaria, France, Germany, Poland, and Slovenia will host cutting-edge AI hubs, to boost #European AI innovation.
Read more: europa.eu/!rP6D6M
The @eurohpc-ju.bsky.social has selected #six new #AIFactories to strengthen Europe's #AI leadership! 🌍
Austria, Bulgaria, France, Germany, Poland, and Slovenia will host cutting-edge AI hubs, to boost #European AI innovation.
Read more: europa.eu/!rP6D6M
March 13, 2025 at 6:38 AM
That's big news for France as the AI2F consortium is one of the #AIFactories selected. It strengthens the AI dimension of Alice Recoque, the EuroHPC exascale system deployed in France at @cea.fr, and it will help to foster & support an already very lively AI ecosystem in France
#HPC #AI #Europe
#HPC #AI #Europe
Reposted by Marc Joos
The recorded video of our talk at FOSDEM25 is available: fosdem.org/2025/schedul...
Many thanks again to @marcjoos.bsky.social who did an excellent job presenting the talk and answering questions.
Many thanks again to @marcjoos.bsky.social who did an excellent job presenting the talk and answering questions.
fosdem.org
March 11, 2025 at 7:28 AM
The recorded video of our talk at FOSDEM25 is available: fosdem.org/2025/schedul...
Many thanks again to @marcjoos.bsky.social who did an excellent job presenting the talk and answering questions.
Many thanks again to @marcjoos.bsky.social who did an excellent job presenting the talk and answering questions.
Reposted by Marc Joos
I wrote a little text to accompany this slide. It sums up the hour-long presentation in just a few words.
www.glennklockwood.com/garden/diffe...
#HPC #AI
www.glennklockwood.com/garden/diffe...
#HPC #AI
differences between AI and HPC
System architecture There are a few differences between designing a supercomputer for AI and designing a supercomputer for traditional modeling and simulation ...
www.glennklockwood.com
February 16, 2025 at 7:13 PM
I wrote a little text to accompany this slide. It sums up the hour-long presentation in just a few words.
www.glennklockwood.com/garden/diffe...
#HPC #AI
www.glennklockwood.com/garden/diffe...
#HPC #AI
Reposted by Marc Joos
If you actively use or contribute to EasyBuild, please participate in the 8th EasyBuild User Survey:
ugent.qualtrics.com/jfe/form/SV_...
Help us reach our goal of at least 100 participants by the end of the month!
#HPC
ugent.qualtrics.com/jfe/form/SV_...
Help us reach our goal of at least 100 participants by the end of the month!
#HPC
8th EasyBuild User Survey
8th EasyBuild User Survey
ugent.qualtrics.com
February 6, 2025 at 7:25 AM
If you actively use or contribute to EasyBuild, please participate in the 8th EasyBuild User Survey:
ugent.qualtrics.com/jfe/form/SV_...
Help us reach our goal of at least 100 participants by the end of the month!
#HPC
ugent.qualtrics.com/jfe/form/SV_...
Help us reach our goal of at least 100 participants by the end of the month!
#HPC
Reposted by Marc Joos
ClusterShell 1.9.3 is now available in EPEL and Debian. Not using clustershell groups on your #HPC cluster yet?! Check out the new bash completion feature! Demo recorded on Sherlock at @stanford-rc.bsky.social with ~1,900 compute nodes and many group sources!
asciinema.org/a/699526
asciinema.org/a/699526
clustershell bash completion (v1.9.3)
This short recording demonstrates the bash completion feature available in ClusterShell 1.9.3, showcasing its benefits when using the clush and cluset command-line tools.
asciinema.org
February 3, 2025 at 5:49 AM
ClusterShell 1.9.3 is now available in EPEL and Debian. Not using clustershell groups on your #HPC cluster yet?! Check out the new bash completion feature! Demo recorded on Sherlock at @stanford-rc.bsky.social with ~1,900 compute nodes and many group sources!
asciinema.org/a/699526
asciinema.org/a/699526
Reposted by Marc Joos
Lmod is getting a shoutout during the talk on Environment Modules (@envmodules.bsky.social) at the 10th #HPC, Big Data, and Data Science.
There’s no rivalry between “competing” FOSS projects at #FOSDEM, only mutual respect and exchange of ideas!
There’s no rivalry between “competing” FOSS projects at #FOSDEM, only mutual respect and exchange of ideas!
February 2, 2025 at 10:26 AM
Lmod is getting a shoutout during the talk on Environment Modules (@envmodules.bsky.social) at the 10th #HPC, Big Data, and Data Science.
There’s no rivalry between “competing” FOSS projects at #FOSDEM, only mutual respect and exchange of ideas!
There’s no rivalry between “competing” FOSS projects at #FOSDEM, only mutual respect and exchange of ideas!
Reposted by Marc Joos
We are accepting mini-donations for HPC.social in the 10th #HPC, Big Data, and Data Science devroom at #FOSDEM25.
I’ll pool these together and donate it all in one go right after FOSDEM, pinky swear!
You can also donate directly yourself, see github.com/sponsors/hpc...
I’ll pool these together and donate it all in one go right after FOSDEM, pinky swear!
You can also donate directly yourself, see github.com/sponsors/hpc...
February 2, 2025 at 11:11 AM
We are accepting mini-donations for HPC.social in the 10th #HPC, Big Data, and Data Science devroom at #FOSDEM25.
I’ll pool these together and donate it all in one go right after FOSDEM, pinky swear!
You can also donate directly yourself, see github.com/sponsors/hpc...
I’ll pool these together and donate it all in one go right after FOSDEM, pinky swear!
You can also donate directly yourself, see github.com/sponsors/hpc...
Reposted by Marc Joos
EESSI will be featured in two back-to-back talks today at 12:30 in the #HPC devroom at #FOSDEM25.
Thomas Röblitz (UBergen) will talk about RSM on top of EESSI, Henrik Nortamo (CSC.fi) presenting the EuroHPC Federation Platform, in which EESSI will be integrated.
fosdem.org/2025/schedul...
Thomas Röblitz (UBergen) will talk about RSM on top of EESSI, Henrik Nortamo (CSC.fi) presenting the EuroHPC Federation Platform, in which EESSI will be integrated.
fosdem.org/2025/schedul...
FOSDEM 2025 - HPC, Big Data & Data Science
fosdem.org
February 2, 2025 at 6:35 AM
EESSI will be featured in two back-to-back talks today at 12:30 in the #HPC devroom at #FOSDEM25.
Thomas Röblitz (UBergen) will talk about RSM on top of EESSI, Henrik Nortamo (CSC.fi) presenting the EuroHPC Federation Platform, in which EESSI will be integrated.
fosdem.org/2025/schedul...
Thomas Röblitz (UBergen) will talk about RSM on top of EESSI, Henrik Nortamo (CSC.fi) presenting the EuroHPC Federation Platform, in which EESSI will be integrated.
fosdem.org/2025/schedul...
I'm very excited to announce that I'll be speaking at #FOSDEM this year to talk about @envmodules.bsky.social in the #HPC devroom, on behalf of Xavier Delaruelle, #EnvModules lead developer. If you want to know more about the tool and its current & future evolution, join us on Sunday at 11:05!
January 30, 2025 at 6:04 PM
I'm very excited to announce that I'll be speaking at #FOSDEM this year to talk about @envmodules.bsky.social in the #HPC devroom, on behalf of Xavier Delaruelle, #EnvModules lead developer. If you want to know more about the tool and its current & future evolution, join us on Sunday at 11:05!