Ticket 17240

Summary:	Server and client version compatibility
Product:	Slurm	Reporter:	Mike Behan <michajb15>
Component:	slurmctld	Assignee:	Benjamin Witham <benjamin.witham>
Status:	RESOLVED INFOGIVEN	QA Contact:
Severity:	4 - Minor Issue
Priority:	---
Version:	23.02.1
Hardware:	Linux
OS:	Linux
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Description Mike Behan 2023-07-20 09:46:17 MDT

I have a slurm server that's CentOS 7 running the 23.02.1 slurm server processes.  I want to have slurm clients running Ubuntu, but the Ubuntu client versions of slurm we're getting are 21.x.

Is the client version too far away from the server version (23 vs. 21), or is that still supported?  Please advise.

Thanks,
Mike

Comment 1 Benjamin Witham 2023-07-20 10:46:24 MDT

Hello Mike, 

The setup you've described will be compatible with each other. Compatibility is determined on two conditions. 

First, the slurm daemons work on a hierarchy. At the top of this hierarchy is the slurmdbd (if you're using it), followed by the slurmctld, and finally the slurmds. As long as your slurmdbd version is greater than or equal to your slurmctld version, and the slurmcltd version must be greater than or equal to the version of your slurmd's version.

Next, all daemon versions must be within 3 versions of the slurmdbd/slurmctld. In your example, your cluster is good, as your server is running 23.02, and your clients would be running 21.08, which is within 3 versions of your server. (21.08 -> 22.05 -> 23.02)
However, if you decide to upgrade your slurm server to the next version, you would need to upgrade your clients as well. 

https://slurm.schedmd.com/quickstart_admin.html#upgrade
https://slurm.schedmd.com/troubleshoot.html#network

Comment 2 Mike Behan 2023-07-24 03:37:32 MDT

Thanks for the clarity; closing ticket

Comment 3 Mike Behan 2023-07-24 03:38:04 MDT

got information I was looking for, thx