Dear HPC Users,
With the introduction of Claix 2025, we have changed the way default partitions are defined for jobs that provide none.
Prior to this change, the default partition was statically defined for all Slurm project accounts. A job submitted without a partition would fall back to this hard-coded default partition.
This has now changed. We now take a best-effort approach to define the default partition for each job dynamically, based on the login / submit node from which the job was submitted, the account used and the resources requested.
Jobs submitted from Claix23 machines will set a default c23ms partition for CPU only jobs and c23g partition for GPU jobs.
The same will now happen with jobs submitted from Claix25 machines (c25ms and c25g).
IH projects and login nodes will also be taken into account.
We still ask for users to try and explicitly define partitions for their jobs to avoid any undesired behaviors.
The best practice is therefore still to define partitions in the jobs explicitly.
This change should not affect the majority of jobs or how they are billed.
