[slurm-users] Fairshare tree after SLURM upgrade

[Gestió Servidors]

Hello,

 

I’m going to upgrade my SLURM version from 17.11.5 to 19.05.1. I know this is not the last version, but I manage another cluster that is running, also, this version. My question is: during the process, I need to upgrade “slurmdbd”. All the fairshare tree (with rawusage, effectvusage, fairshare, etc), will be kept in the new version after upgrading?

 

Thanks.

 

[Ole Holm Nielsen]

Beware: You can as a maximum upgrade only by 2 Slurm major versions!
This is well known, see a summary in
https://wiki.fysik.dtu.dk/niflheim/Slurm_installation#upgrading-slurm

All data in your database will be migrated correctly to the new Slurm
version. This assumes that your upgrade process worked without errors!
Older MySQL versions may have problems!

Therefore it is critical to first test the database upgrade on a test
system! Please see the above page for advice on the upgrade testing.

/Ole

[Lech Nieroda]

Also keep in mind that the default FairTree Algorithm changes in 19.05 to FAIR_TREE. You’d have to set the PriorityFlag to NO_FAIR_TREE in order to revert to the classic algorithm, otherwise your FairShare calculations will be quite different even though the raw usage data remains the same.

Kind regards,
Lech