Glenn K. Lockwood
@glennklockwood.com
1.2K followers 210 following 970 posts
I am a supercomputing enthusiast, but I usually don't know what I'm talking about. I post about large-scale infrastructure for #HPC and #AI.
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glennklockwood.com
Eye-opening since leaving MSFT: how many buyers are out there who just want to turn space+power into $$$. They have zero interest in #AI; it's just the next BTC. This is for them.

How this $130 billion energy management company is fueling Nvidia’s infrastructure growth www.cnbc.com/2025/09/30/h...
How this $130 billion energy management company is fueling Nvidia’s infrastructure growth
Schneider announced in June it would collaborate with Nvidia to serve the growing demand for sustainable, AI-ready infrastructure.
www.cnbc.com
glennklockwood.com
I couldn't wait to get early access to Copilot for Office when I worked at Microsoft. But as soon as I got it, I realized I always got better results (and infinitely fewer random timeout errors) when I fell back to ChatGPT.

I'm only paying for one AI service, and Copilot can't beat ChatGPT.
glennklockwood.com
Although I am not officially attending OCP this year, I will be participating in an early morning breakfast panel that will discuss future directions of #AI infrastructure. If you'll be in San Jose that week, consider attending!

solidigm.techarena.ai/ocp-panel/

#shameless #selfpromotion
Navigating the AI Compute Curve: Adoption of Efficiently Scalable Data Center Solutions
Join Solidigm and industry experts to discuss the challenges and opportunities managing, optimizing, and cooling today’s data centers.
solidigm.techarena.ai
glennklockwood.com
No, not a fan of the sweets. Closest I came was a small spoonful of rømmegrøt.
glennklockwood.com
Time for my vacation in North Dakota to come to an end. I can fly to either Denver or Denver. I guess I’m flying to Denver.
glennklockwood.com
A+. I didn’t even remember that episode til I saw it on the lutefisk wikipedia page. Your King of the Hill knowledge is noteworthy
glennklockwood.com
Lefse is hard to pass up. My wife makes it. But lutefisk…she won’t touch it, and certainly won’t make it.
glennklockwood.com
Here is the lutefisk (bottom right) that I had for dinner. If you don’t know what that is, it’s worth looking up. Sounds way worse than it tastes.
glennklockwood.com
Here’s the klub I had for lunch. Hard to see the ~cm of melted butter at the bottom of the container.
glennklockwood.com
I’m in North Dakota this week celebrating Scandinavian heritage.

That liquid on top is butter.
glennklockwood.com
I like Garth but this decision doesn’t really scream “modern and innovative.” If you stack the C-suite of an AI company with #HPC people, you wind up with an HPC company.
glennklockwood.com
Third(!) earthquake today, all centered along the Hayward fault in Berkeley. Not a huge fan of this.
glennklockwood.com
I vibe coded(ish) a numerical analysis of tens of thousands of checkpoints pulled from tens of millions of GPU-hours of production telemetry, and it just passed (lightweight) peer review.

Next stop: dodging tomatoes on stage at #SC25.
glennklockwood.com
VAST is the first job I’ve ever had where I didn’t have access to my own supercomputer, so I’ve never had a reason to run MPI over any home networks.
glennklockwood.com
Ultra Ethernet is attractive from that standpoint. You can run it over any Ethernet-compatible router, even home wifi junk. Gets you further than just using the Linux TCP stack, and you can see how its perf improves with better NICs and switches.
glennklockwood.com
Agreed 100%. But I don’t think Raspberry Pi is going to provide good exposure to those issues since its I/O subsystem is so minimal.
glennklockwood.com
That’s the thing—it’s fun, and it gets people interested in exploring parallel computing. But it’s not a cost-effective way to teach anything beyond the concepts. MPI runs just fine on VMs or containers on a basic laptop.
glennklockwood.com
Yes! This is exactly what I was hoping that someone has articulated. Also helps me figure out how to avoid going down that road.

I am also amazed you had this article locked and loaded. Clearly I am not the only one among us who’s thought about this 🙂
glennklockwood.com
Amazes me that people can claim to be an expert, regurgitate what others have said, and have audiences actually believe they are visionary. Do they truly drink their own kool aid, or do they know that they are actors on a stage? Genuinely curious what it takes to be that kind of person.
glennklockwood.com
Also, check out the earthworks being done in preparation for their upcoming Doudna system. Going to require a lot of cooling!
glennklockwood.com
Visited some of my old pals at @nersc.bsky.social this afternoon. It feels like a lot has changed, but at the same time, it’s the same old place. I do miss working here, but am glad I now get a chance to visit under the auspices of my new role at VAST.
glennklockwood.com
Breaking news everyone: spending $3K on Raspberry Pis does not get you anything close to a productive #HPC system.

There’s a reason people don’t do this.

www.jeffgeerling.com/blog/2025/i-...
I regret building this $3000 Pi AI cluster | Jeff Geerling
www.jeffgeerling.com
glennklockwood.com
I assume this +$4b buildout is the huge site next door to the just-disclosed Fairwater site. If you consider this a single "datacenter," this is what a ~gigawatt AI supercomputer is going to look like in 2027.