[gpfsug-discuss] Removing GUI nodes

[Jonathan Buzzard]

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