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@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@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@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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