[gpfsug-discuss] Services on DSS/ESS nodes

Jonathan Buzzard jonathan.buzzard at strath.ac.uk
Sat Oct 3 18:16:39 BST 2020

On 03/10/2020 12:19, Luis Bolinches wrote:
> Are you mixing those ESS DSS in the same cluster? Or you are only 
> running DSS

Only running DSS. We are too far down the rabbit hole to ever switch to 
ESS now.

> Mixing DSS and ESS in the same cluster is not a supported configuration.

I know, it means you can never ever migrate your storage from DSS to ESS 
without a full backup and restore. Who with any significant amount of 
storage is going to want to do that? The logic behind this escapes me, 
or perhaps in that scenario IBM might relax the rules for the migration 

> You really need to talk with Lenovo as is your vendor. The fact that in 
> your region your support is being given by an IBMer or not is not a 
> relevant point. High enough in the chain always will end at IBM on any 
> region as GNR is IBM tech for 17 years (yes 17) so if weird enough even 
> on regions where Lenovo might do even third level it might end on 
> development and/or research. But that is a Lenovo/IBM agreement not you 
> and IBM.
> So please get the support statement from Lenovo about this and pls share 
> it if you want/can so we all learn their position.

Will attempt that, though I do think it should be a supported config out 
the box :-)


Jonathan A. Buzzard                         Tel: +44141-5483420
HPC System Administrator, ARCHIE-WeSt.
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG

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