[one-users] Best way to migrate datastores 0 & 1 to new storage area

[Alexandre Bezroutchko]

On 04/18/2013 06:42 PM, Gerry O'Brien wrote:
> Hi,
>
>     We would like to migrate out installation to a new storage, so
> that we can use ZFS instead of EXT4 for datastores 0 and 1. Are there
> guidelines on how best to achieve this? If we just shut-down the
> service it will take a long time to move existing files as they are
> large so the disruption will be substantial.
I would be interested to know a proper answer to this question too. To
my knowledge such an operation would be outside of what Opennebula
can/want to support, but you probably can achieve what you want with
some trickery.

If you can afford some downtime, you can try using the following
approach to keep it to minimum:
http://www.bouncybouncy.net/ramblings/posts/xen_live_migration_without_shared_storage.

If you are looking for even shorted downtimes, there is another trick
described here
https://bitbucket.org/hirofuchi/xnbd/wiki/Home#!scenario-3-live-vm-disk-migration-with-xen.
Note that the article's title suggests this is xen-specific, there are
some kvm/qemu-specific information in the article.

What hypervisor you use?

Best regards,
Alex
>
>         Regards,
>             Gerry
>