Posted: 23 Mar 2020 | 10:45
I was recently working with a colleague to investigate performance issues on a login node for one of our HPC systems. I should say upfront that looking at performance on a login node is generally not advisable, they are shared resources not optimised for performance.
We always tell our students not to run performance benchmarking on login nodes, because it's hard to ensure the results are reproducible. However, in this case we were just running a very small (serial) test program on the login node to ensure it worked before submitting it to the batch systems and my colleague noticed a performance variation across login nodes that was unusual.
Posted: 1 Mar 2020 | 10:37
Guido Giuntoli visited STFC's Daresbury Laboratory in December 2019 through the HPC-Europa3 programme. Here he describes his work and time in the UK.