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.
Reposted by Glenn K. Lockwood
Appreciate the candor, and will be making sure the team is aware of the issues.
I'd recommend to all to check out the article here:
www.theregister.com/2025/11/27/t...
I'd recommend to all to check out the article here:
www.theregister.com/2025/11/27/t...
Blackhole QuietBox, Tenstorrent's AI workstation reviewed
hands on: $12K machine promises performance that can scale to 32 chip servers and beyond but immature stack makes harnessing compute challenging
www.theregister.com
November 27, 2025 at 4:55 PM
Appreciate the candor, and will be making sure the team is aware of the issues.
I'd recommend to all to check out the article here:
www.theregister.com/2025/11/27/t...
I'd recommend to all to check out the article here:
www.theregister.com/2025/11/27/t...
I defended my doctoral dissertation thirteen years ago this month, and the only question I got from my entire committee was “why doesn’t the water fall out of jello?”
I still think about that.
I still think about that.
November 27, 2025 at 5:02 PM
I defended my doctoral dissertation thirteen years ago this month, and the only question I got from my entire committee was “why doesn’t the water fall out of jello?”
I still think about that.
I still think about that.
It was tradition at NERSC for the director to give everyone a half-day off on the Wednesday before Thanksgiving. By comparison, VAST has no company holidays, so technically, nobody gets Thanksgiving off (much less the half day before it!)
November 26, 2025 at 9:29 PM
It was tradition at NERSC for the director to give everyone a half-day off on the Wednesday before Thanksgiving. By comparison, VAST has no company holidays, so technically, nobody gets Thanksgiving off (much less the half day before it!)
A brave stake in the ground that defines what is (and isn’t) a parallel file system. I generally agree with Chris’ explanation. But I’m sure he’ll get hate from parallel storage elitists who don’t like how inclusive his take is.
An attempt - Parallel file systems explained: Metadata, striping, and throughput - blocksandfiles.com/2025/11/26/p...
Parallel file systems explained: Metadata, striping, and throughput
Although crucial for high-performance computing workloads, the different kinds of parallel file systems can be confusing.
blocksandfiles.com
November 26, 2025 at 4:50 PM
A brave stake in the ground that defines what is (and isn’t) a parallel file system. I generally agree with Chris’ explanation. But I’m sure he’ll get hate from parallel storage elitists who don’t like how inclusive his take is.
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