[Users] Attach NFS storage to multiple datacenter

[Amedeo Salvati]

Il 16/01/2014 18:00, users-request at ovirt.org ha scritto:
> From: "Tobias Fiebig"<mail at wybt.net>
> To: "Elad Ben Aharon"<ebenahar at redhat.com>
> Cc:"Users at ovirt.org List"  <Users at ovirt.org>
> Sent: Thursday, January 16, 2014 6:37:24 PM
> Subject: Re: [Users] Attach NFS storage to multiple datacenter
>
> Heho,
> On Thu, 2014-01-16 at 11:10 -0500, Elad Ben Aharon wrote:
>> >You don't have to attach/detach the domain for every VM export. Sorry for not being clear. You can export all your VMs to the export domain at once and then detach the export domain and attach it to the second DC.
> May have miscommunicated that...
> I can not do this because this kind of means that the vms will be down
> during the whole movement process. I'd like to reduce the per-vm
> downtime as much as possible.
>
> With best Regards,
> Tobias
you can decrease the downtime by:

- live snapshot VM1;
- clone VM1 from snapshot to VM1-NEW (during this process VM1 is 
up&running);
- export VM1-NEW to export domain (VM1 up&running);
- detach export domain from old DC;
- attach export domain to new DC;
- import VM1-NEW (VM1 still up&running);
- start VM1-NEW on single mode and configure;
- stop apps from VM1 (downtime);
- optionally sync app data from VM1 to VM1-NEW (downtime);
- start apps on VM1-NEW (apps up&running on new DC).
- stop VM1 on old DC.

HTH
a

-- 
Amedeo Salvati
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