Glenn K. Lockwood
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glennklockwood.com
Glenn K. Lockwood
@glennklockwood.com
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.
It’s funny to see the HPE K3000 docs pitch DAOS’s key capability as bypassing POSIX, when the DAOS team openly states that the majority of DAOS users access it via POSIX. Something doesn’t line up in the value prop.
=>
"The Future of Supercomputing Storage", HPE, DAOS UG at SC25 daos.io/wp-content/u...
HPE Cray K3000 DAOS
GX5000 bsky.app/profile/ogaw...

SmartNIC Offload, RESDIS 2025 dl.acm.org/doi/10.1145/...
www.dropbox.com/scl/fi/ymjo4...

DAOS on 400 Gbps, HPE, WIP, PDSW 2025 www.pdsw.org/pdsw25/paper...
November 25, 2025 at 2:29 PM
As much as I like DAOS and Denis, he was asking for trouble when he implied that DAOS is better than others for single, huge systems. For example, the largest VAST namespace in production is larger (in exabytes) than the largest single Lustre or DAOS namespace in existence.
November 24, 2025 at 9:59 PM
Reposted by Glenn K. Lockwood
St. Louis's weather is working in our favor! 😁 Join us in room 260 for the Interactive and Urgent #HPC workshop at #SC25. Starting at 8:30. Keynote by Alan Chalker of OOD fame!
November 21, 2025 at 1:50 PM
Reposted by Glenn K. Lockwood
=>
"The Future of Supercomputing Storage", HPE, DAOS UG at SC25 daos.io/wp-content/u...
HPE Cray K3000 DAOS
GX5000 bsky.app/profile/ogaw...

SmartNIC Offload, RESDIS 2025 dl.acm.org/doi/10.1145/...
www.dropbox.com/scl/fi/ymjo4...

DAOS on 400 Gbps, HPE, WIP, PDSW 2025 www.pdsw.org/pdsw25/paper...
November 21, 2025 at 1:04 PM
Reposted by Glenn K. Lockwood
📆 Our activities at #SC25 on Friday:

📈 Workshop: Third International Workshop on HPC Testing and Evaluation of Systems, Tools, and Software (HPCTESTS 2025)
⌚ 8:30 am - 12:30 pm
📍 Room: 276
👤 Andreas Herten

go.fzj.de/sc25

#HPCignites #HPC4Germany
November 21, 2025 at 12:01 AM
This years venue for the #SC25 Tech Program Reception took me back to my childhood, going to my local science center in New Jersey. As has happened all week though, I kept running into friends and colleagues, so I didn’t actually get to see many of the exhibits. Alas!
November 21, 2025 at 5:00 AM
Reposted by Glenn K. Lockwood
Come work on GROMACS mixed precision algorithms!
New #HPC Job! ⭐️
HPC Software Scientist
Location: Stockholm, Sweden
Employer: KTH Royal Institute of Technology
Remote: Remote friendly
November 21, 2025 at 3:51 AM
Reposted by Glenn K. Lockwood
November 20, 2025 at 5:43 PM
Reposted by Glenn K. Lockwood
November 20, 2025 at 7:05 PM
I sometimes have this nightmare where I am at SC on the last day, forget that the exhibit closes early (at 3pm), and wind up never getting to walk the floor at all. I don’t know what Freud would say about it, but I’m worried that it’ll come true this year. Feels like I missed the whole of #SC25.
November 20, 2025 at 4:49 AM
Reposted by Glenn K. Lockwood
If you are attending the Friday workshops at #SC25, please consider attending the Sixth Combined Workshop on Interactive and Urgent High-Performance Computing. Keynote by Alan Chalker from OSC, talking about Open OnDemand.
www.interactivehpc.com
@larofeticus.bsky.social #HPC
InteractiveHPC
Interactive and Urgent HPC Workshops and BoFs
www.interactivehpc.com
November 19, 2025 at 1:20 PM
Andreas Dilger is now working for The Lustre Collective (thelustrecollective.com) after leaving DDN. I am glad to see his leadership continue to drive Lustre into the future. Say what you will about it, Lustre is the standard to which every other #HPC file system is compared.

#SC25
November 18, 2025 at 11:50 PM
It’s hard to not be a little cynical about Lustre sometimes after working in a Lustre-free world for the last two years. Want to expand your Lustre file system? Step 1 is stand up redis.
November 18, 2025 at 11:43 PM
they must be too busy breaking the yottaflop barrier to staff their booth
November 18, 2025 at 11:22 PM
Complete with Ian Buck kung fu gestures! But Ian’s message is right; AI doesn’t replace scientific computing as much as doomsayers want to decry that the AI/science communities want it to.

#HPC
November 18, 2025 at 12:23 PM
When I spent a Thanksgiving week after SC writing the non-MPI layer for Darshan years ago, I thought to myself “surely this work will make me famous!”

I guess my ship finally came in at the PDSW keynote by Rob Ross.

#SC25
November 17, 2025 at 3:26 PM
Reposted by Glenn K. Lockwood
You'll find the full schedule of EPCC activity at #SC25 on our website: www.epcc.ed.ac.uk/whats-happen...
November 17, 2025 at 8:42 AM
The exhibit hall overflows into the old stadium this year. Fun to watch the setup from afar, but feel bad for the vendors who didn’t get a spot in the main room.

#SC25
November 17, 2025 at 1:35 AM
Here’s Rob gesturing about the nuances of PnetCDF. Sadly I didn’t think to snap a photo of @adrianjhpc.bsky.social for completeness.

#SC25
November 17, 2025 at 1:33 AM
Reposted by Glenn K. Lockwood
#HPC #SC24. Current registration is 15,446. Peak Scinet bandwidth is 14.72 TBPS. 560 exhibitors.
November 16, 2025 at 5:48 PM
Apparently I was the first DAOS user to complain about having to refer to DAOS containers by UUIDs, so they added container labels. Don’t know if this is completely true, but I remember voicing this and will accept the credit if Mohamad is willing to give it to me 🙂

(#SC25 tutorial in rm. 120)
November 16, 2025 at 4:41 PM
Reposted by Glenn K. Lockwood
Arrived at #SC25

I’m away from my computer today 😁 mostly … you’ll understand if you see me …

Feel free to say hello if you see me around.

Looking forward to a great week of people and technology etc.

#HPC #AI #cloud #supercomputing
November 16, 2025 at 1:33 PM
New SC record: ran into a colleague within 2 minutes of walking into the airport terminal from the curb. Been catching up nonstop straight through takeoff. Conference starts earlier and earlier every year.
November 15, 2025 at 6:27 PM
Frontiere ran on Frontier. This alone is worth recognition.

The TLDR is that a really big HACC job ran on Frontier with a bunch of new algorithmic optimizations. Neato.
November 15, 2025 at 2:54 PM