[gpfsug-discuss] Removing GUI nodes

[Jonathan Buzzard]

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