[gpfsug-discuss] Removing GUI nodes

[Ryan Novosielski]

You might need to change the perfmon config. Or disable perf monitoring.

You don’t need the GUI to take advantange of that stuff though, AFAIK.

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On Feb 7, 2026, at 12:23, Jonathan Buzzard <jonathan.buzzard at strath.ac.uk> wrote:


I am trying to remove the GUI nodes from our cluster as they are no longer required. I have managed one but the other is proving to be a problem

If I try and delete it I get

[root at gpfs0 ~]# mmdelnode gui1
mmdelnode: Node gui1.<redacted> is being used as a performance monitoring collector node.
mmdelnode: Command failed. Examine previous error messages to determine cause.

OK, lets change that

[root at gpfs0 ~]# mmchnode --noperfmon -N gui1
Sat  7 Feb 12:29:48 GMT 2026: mmchnode: Processing node gui1.<redacted>
mmchnode: Propagating the cluster configuration data to all
 affected nodes.  This is an asynchronous process.


That looks to have worked, lets try again 15 minutes later

[root at gpfs0 ~]# mmdelnode gui1
mmdelnode: Node gui1.<redacted> is being used as a performance monitoring collector node.
mmdelnode: Command failed. Examine previous error messages to determine cause.

Still no joy. From recollection the performance monitoring was only added as a requirement for setting up the GUI and was added to the GUI nodes.

Do I have to designate another node for performance monitoring or is there a way to get rid of it altogether, given we don't have GUI nodes any more and are unlikely to have them ever again either.


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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