On 13/08/15 15:32, Simon Thompson (Research Computing - IT Services) wrote:
I've set up a couple of VM hosts to export some of its GPFS filesystem
via NFS to machines on that VM host[1,2].
Provided all your sockets no the VM host are licensed.
Yes, they are.
Is live migration of VMs likely to work?
Live migration isn't a hard requirement, but if it will work, it could
make our life easier.
Live migration using a GPFS file-system on the hypervisor node should work
(subject to the usual caveats of live migration).
Whether live migration and your VM instances would still be able to NFS
mount (assuming loopback address?) if they moved to a different
hypervisor, pass, you might get weird NFS locks. And if they are still
mounting from the original VM host, then you are not doing what the FAQ
says you can do.
Yes, that's the intent - VMs get access to GPFS from the hypervisor -
that complies with the licence and, presumably, should get better
performance.
It sounds like our problem would be the NFS end of this if we try a live
migrate.
Chris
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