[pve-devel] Storage migration: online design solution

[Michael Rasmussen]

On Wed, 09 Jan 2013 09:24:15 +0100 (CET)
Alexandre DERUMIER <aderumier at odiso.com> wrote:

> 
> 
> Maybe I'm wrong, but I don't think we need nbd for storage migrate on the same host. (just use new device/file as target option of qmp mirror)
> 
That was also what I ment. NBD is only required if you need to migrate
to another host.

> start ndb server on remote server
> Launch drive-mirror on remote nbd, 
> at the end of block mirror,the vm run on source server with remote storage on target server through nbd socket
> the migrate vm to the target server
> then rattach the target volume to the vm (drive-reopen (?))
> stop nbdserver
> 
> This is the way is implemented in libvirt
> 
I cannot see why it is required to migrate the VM also? Maybe libvirt
is having another agenda than my proposal?

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