[gpfsug-discuss] Removing GUI nodes

[Jan-Frode Myklebust]

mmperfmon config update --collectors othernode1,othernode2



  -jf

lør. 7. feb. 2026 kl. 18:32 skrev Ryan Novosielski <novosirj at rutgers.edu>:

> 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.
>
> --
> #BlackLivesMatter
> ____
> || \\UTGERS,     |---------------------------*O*---------------------------
> ||_// the State  |     Ryan Novosielski (he/him) - novosirj at rutgers.edu
> || \\ University | Sr. Technologist - 973/972.0922 (2x0922) ~*~ RBHS Campus
> ||  \\    of NJ  | Office of Advanced Research Computing - MSB
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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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