Yes, native GPFS access can be used by AFM, but only for shorter distances
(10s of miles, e.g.).  For intercontinental or cross-US distances, the
latency would be too high for that protocol so NFS would be recommended.

Lyle




From:   "Marc A Kaplan" <[email protected]>
To:     gpfsug main discussion list <[email protected]>
Date:   03/29/2019 03:05 PM
Subject:        Re: [gpfsug-discuss] A net new cluster
Sent by:        [email protected]



I don't know the particulars of the case in question, nor much about ESS
rules...
But for a vanilla Spectrum Scale cluster -.

1) There is nothing wrong or ill-advised about upgrading software and then
creating a new version 5.x file system... keeping any older file systems in
place.

2) I thought AFM was improved years ago to support GPFS native access --
need not go through NFS stack...?

Whereas your wrote:
 ... nor is it advisable to try to create a new pool or filesystem in same
cluster and then migrate (partially because migrating between filesystems
within a cluster with afm would require going through nfs stack afaik) ...





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