On 29/05/2020 20:55, Stephen Ulmer wrote:
I have a question about multi-cluster, but it is related to this thread
(it would be solving the same problem).
Let’s say we have two clusters A and B, both clusters are normally
shared-everything with no NSD servers defined.
Er, even in a shared-everything all nodes fibre channel attached you
still have to define NSD servers. That is a given NSD has a server (or
ideally a list of servers) that arbitrate the disk. Unless it has
changed since 3.x days. Never run a 4.x or later with all the disks SAN
attached on all the nodes.
We want cluster B to be
able to use a file system in cluster A. If I zone the SAN such that
cluster B can see all of cluster A’s disks, can I then define a
multi-cluster relationship between them and mount a file system from A on B?
To state it another way, must B's I/O for the foreign file system pass
though NSD servers in A, or can B’s nodes discover that they have
FibreChannel paths to those disks and use them?
My understanding is that remote cluster mounts have to pass through the
NSD servers.
JAB.
--
Jonathan A. Buzzard Tel: +44141-5483420
HPC System Administrator, ARCHIE-WeSt.
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG
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