[gpfsug-discuss] Dual server NSDs - change of hostname

[Uwe Falke]

Hi John, 

some last thoughts
mmdelnode/mmaddnode is an easy way to move non-NSD servers, but doing so 
for NSD servers requires to run mmchnsd, and that again requires a 
downtime for the file system the NSDs are part of (in Scale 4 at least, 
what we are talking right here). That could only be circumvented by 
mmdeldisk/mmadddisk the NSDs of the NSD server to be moved (with all the 
restriping).
If that's ok for you go ahead. 

Else I think you might give the mmchnode way a second thought. I'd stop 
GPFS on the server to be moved (although  that should also be 
hot-swappable) which should prevent any havoc for Scale and offers you 
plenty of opportunity to check your final new network set-up, before 
starting Scale on that renewed node. 

YMMV, and you might try different methods on your test system of course. 

 
Mit freundlichen Grüßen / Kind regards

 
Dr. Uwe Falke
 
IT Specialist
High Performance Computing Services / Integrated Technology Services / 
Data Center Services
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