Hi Alex,
Thanks for the interesting reply. We are running kvm/qemu so I'm
not sure how this would work for us although we may use it in out Citrix
infrastructure. I have a question: after the xNDB proxy is shutdown and
restarted where does the cache get stored?
In our OpenNebula installation, is it possible to switch system the
datastore from 0 to some other datastore without interruption?
Regards,
Gerry
On 19/04/2013 14:50, Alexandre Bezroutchko wrote:
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
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Gerry O'Brien
Systems Manager
School of Computer Science and Statistics
Trinity College Dublin
Dublin 2
IRELAND
00 353 1 896 1341
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