[gpfsug-discuss] Removing GUI nodes

[Ryan Novosielski]

That does not sound wacky. I believe you can enable those roles without actually having the software installed (mine are that way, for the server side – client clusters, we don’t have that turned on). I would think if you were to remove the role from all of the systems, you should be able to do what you wanted to do. That role designates that the node should be monitored for performance, not host the service.

This one may be in the docs, although I’ve not looked myself – how to remove/disable the performance monitoring system.

Sent from my iPhone

> On Feb 8, 2026, at 06:08, Jonathan Buzzard <jonathan.buzzard at strath.ac.uk> wrote:
> 
> On 07/02/2026 23:00, Jan-Frode Myklebust wrote:
>> mmperfmon config update --collectors othernode1,othernode2
> 
> That just pushes the performance monitoring to other nodes. I am pretty sure prior to installing the GUI nodes I didn't have any "performance monitoring" and having never used it would like to get back to that state of affairs :-)
> 
> [root at gpfs0 ~]# mmperfmon config delete --all
> mmperfmon: The performance monitoring configuration cannot be deleted while there are nodes designated for performance monitoring. Please remove the designation with mmchnode --noperfmon.
> mmperfmon: Command failed. Examine previous error messages to determine cause.
> 
> Noting that I have already attempted to designate my one remaining performance monitoring node (aka GUI node) as not doing that with mmchnode which does not seem to do anything.
> 
> Noting that the manpage for mmperfmon say for config delete --all
> 
> removes the entire performance monitoring configuration from
> IBM Storage Scale.
> 
> I have tried upgrading the GUI node to 5.2.3 to match the rest of the system, and running the mmchnode --noperfmon on the node itself with GPFS both started and stopped. None of that made any difference :-( At least I can run mmchconfig release=LATEST now.
> 
> Interestingly mmlscluster shows the two DSS-G nodes as having a designation of "quorum-manager-perfmon" and the GUI node as having no designation. Noting the two DSS-G nodes don't have the pmcollector or pmsensors RPM's installed.
> 
> I suspect I am going to need to open a ticket for this one as something wacky is going on.
> 
> 
> JAB.
> 
> --
> Jonathan A. Buzzard                         Tel: +44141-5483420
> HPC System Administrator, ARCHIE-WeSt.
> University of Strathclyde, John Anderson Building, Glasgow. G4 0NG
> 
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