Olli-Pekka Lehto
opele.bsky.social
Olli-Pekka Lehto
@opele.bsky.social
HPC, large-scale data engineering, rants etc.
Mahdollisuus kyllä, mutta pelkkä toivo ei riitä. Meidän pitäisi oikeasti laittaa paketti kasaan: selkeä brändi, helppo polku tulla ja aito vetovoima. En ole nähnyt ainakaan Suomessa vielä juurikaan konkreettisia askeleita. Potentiaalia olisi, mutta kuka ottaa kopin?
March 15, 2025 at 3:25 PM
One lesson I learned back in the day the hard way: Using CLOCK_REALTIME to calculate precise intervals. Things get messy when NTP adjusts the time. CLOCK_MONOTONIC or CLOCK_BOOTTIME FTW in these cases.
February 18, 2025 at 9:31 PM
Back in the day the Cray T3E could do checkpointing very nicely: www2.lbl.gov/Science-Arti... Someone could correct me if I’m wrong but I don’t think any system since that has been able to achieve the same functionality in a real production environment.
NERSC First To Reach Goal of Seamless Shutdown, Restart of Supercomputer
www2.lbl.gov
December 1, 2024 at 9:07 AM
It was called the Avalanche installer and was prertty slick. www.rocksclusters.org/assets/paper...
www.rocksclusters.org
November 30, 2024 at 8:17 PM
Reposted by Olli-Pekka Lehto
In this paper, researchers have presented an exploration of fuzzy hashing to classify #HPC application executables, inspired by malware detection techniques.

arxiv.org/pdf/2411.18327
November 28, 2024 at 11:29 AM
Kajaani region in #Finland seems to be turning into a globally significant datacenter hub. 🎉
November 28, 2024 at 11:04 PM
Proud to be a part of the long tail of #HPC lurkers 🫡
November 27, 2024 at 11:38 AM
Reposted by Olli-Pekka Lehto
5400W (!) per GB200 NVL4 board exemplifies the hot Winter of Moore's Law.

The next five years' next 10X @ constant power must somehow shave 90% of today's energy: new algorithms & abstractions, codesign, integration, specialization, accelerators, processing near & in-memory, and new interconnects.
November 20, 2024 at 2:48 PM
That is a fantastic book! Seems that y'all know what you are doing
November 19, 2024 at 9:44 PM