[gpfsug-discuss] Question about subnets parameter and remote cluster mounts

Leonardo Sala leonardo.sala at psi.ch
Fri May 5 14:45:06 BST 2023

Dear Achim

thanks, it is clearer now! I read the docs, but it was not very clear to 
me - now I understand that it is enough to specify the parameter on the 
client cluster.

Have a nice weekend!


Paul Scherrer Institut
Dr. Leonardo Sala
Group Leader Data Analysis and Research Infrastructure
Deputy Department Head a.i Science IT Infrastructure and Services department
Science IT Infrastructure and Services department (AWI)
Forschungstrasse 111
5232 Villigen PSI

Phone: +41 56 310 3369
leonardo.sala at psi.ch

On 5/4/23 00:00, Achim Rehor wrote:
> Dear Leonardo,
> you will find a description in the Concepts, Planning, and Installation
> Guide in the GPFS daemon communication section, explaining how the
> startup mechanism works.
> The Administration Guide contains an explanation on MROTs specifics for
> the subnets usage (Chapter 17 in the 5.1.7. version)
> Chapter 33 focuses on remote cluster mounts and contains examples.
> Basically, the node join triggers the compare and the matching, thus a
> client clusters node uses it's subnets configuration (including the
> remote clusters clustername) to initiate the connection.
> On the storage cluster you can also diffentiate your existing subnets
> for use with separate remote mounting clusters. I would recommend still
> to do it on both, just to be precise.
> Initially the idea (as can be seen in the examples in Chapter 33) was
> to force the daemon communication to the storage NSD servers to use the
> 'high speed' network, rather than the lower bandwidth common admin
> network.
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