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...
"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
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.
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.
How high-end supercomputer filesystem DAOS can break out of its niche
How high-end supercomputer filesystem DAOS can break out of its niche
DAOS needs user education, Nvidia GPU access, and better manageability to grow
DAOS has been a great success in the traditional HPC/supercomputing world, but is nowhere in the new, AI-focused, GPU supercomputing arena. What will it take for DAOS to find customers outside its high-end, legacy supercomputing niche?…
dlvr.it
November 24, 2025 at 9:59 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.
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...
"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
=>
"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...
"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...
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
📈 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
📆 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
📈 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
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
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!
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
HPC Software Scientist
Location: Stockholm, Sweden
Employer: KTH Royal Institute of Technology
Remote: Remote friendly
November 21, 2025 at 3:51 AM
Come work on GROMACS mixed precision algorithms!
Reposted by Glenn K. Lockwood
@glennklockwood.com and @willkill07.bsky.social in the house!
November 20, 2025 at 5:43 PM
@glennklockwood.com and @willkill07.bsky.social in the house!
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
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.
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
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
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
www.interactivehpc.com
@larofeticus.bsky.social #HPC
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
#SC25
November 18, 2025 at 11:50 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
#SC25
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
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.
they must be too busy breaking the yottaflop barrier to staff their booth
November 18, 2025 at 11:22 PM
they must be too busy breaking the yottaflop barrier to staff their booth
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
#HPC
The future of supercomputing will be AI accelerated • The Register share.google/7ImYZdHWRsOf...
The future of supercomputing will be AI accelerated
Interview: Nvidia's Ian Buck on the importance of FP64 to power research, in a world that's hot for inferencing
share.google
November 18, 2025 at 12:23 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
#HPC
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
I guess my ship finally came in at the PDSW keynote by Rob Ross.
#SC25
November 17, 2025 at 3:26 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
I guess my ship finally came in at the PDSW keynote by Rob Ross.
#SC25
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
You'll find the full schedule of EPCC activity at #SC25 on our website: www.epcc.ed.ac.uk/whats-happen...
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
#SC25
November 17, 2025 at 1:35 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
#SC25
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
#SC25
November 17, 2025 at 1:33 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
#SC25
Reposted by Glenn K. Lockwood
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)
(#SC25 tutorial in rm. 120)
November 16, 2025 at 4:41 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)
(#SC25 tutorial in rm. 120)
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
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
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
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
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
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.
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.
The TLDR is that a really big HACC job ran on Frontier with a bunch of new algorithmic optimizations. Neato.
ORNL: Largest-Ever Universe Simulation Up for Supercomputing’s Highest Prize
#ORNL #HPC #SC25
Link: ow.ly/9L6o50Xs2gv
#ORNL #HPC #SC25
Link: ow.ly/9L6o50Xs2gv
ORNL: Largest-Ever Universe Simulation Up for Supercomputing’s Highest Prize - HPCwire
DOE researchers are recognized for simulations on the Frontier supercomputer that capture the interactions between gravity and gas spanning 15 billion light-years of cosmic space Nov. 14, 2025 — Last ...
ow.ly
November 15, 2025 at 2:54 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.
The TLDR is that a really big HACC job ran on Frontier with a bunch of new algorithmic optimizations. Neato.