It’s worth noting that Polaris will be considered “at risk” on those days. Furthermore, there may be periods where commands like “qstat” & “qsub” will fail and there may be pauses when accessing files while they apply operating system updates.
Additionally, the compute nodes will be unavailable on the 27th April and will be drained of jobs ahead of the work.
Please accept our apologies for the impact this might have on your research. If you have any problems or concerns, please get in touch via our Twitter @N8HPC