3 ms·
I used Crays under Unicos for quite a while and they weren't crummy at all... given a batch-oriented scientific workload. Even though the memory management was
by wumpus 5y ago
I used Crays under Unicos for quite a while and they weren't crummy at all... given a batch-oriented scientific workload.
Even though the memory management was antiquated, there was an enormous, fast swap device available on every vector Cray.
- pinewurst 5y agoBut users were always hitting that device making it a bottleneck as job sizes grew, at least in my experience. Swap isn’t partial either, just roll out, roll it. Lustre btw was originally designed as a networked substitute HPC swap - the source of many original issues. I didn’t say Unicos was crummy - it was the feel of the system with more than a small few on it.
- wumpus 5y agoIt had amazing bandwidth to the swap device, so no, I've never seen interactive use be slow. Of course that's just my actual usage (NCSA, SDSC, Stennis, etc) and not the only possible experience.