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From Douglas Land <...@looprock.com>
Subject Re: Question about migrating local storage datadisks
Date Wed, 06 Jul 2016 21:35:15 GMT
Thanks Somesh, I'll try just moving the VM and see if it triggers a
datadisk migration.

Sorry, by 'bring up' I just meant migrate to a new host.

On Wednesday, July 6, 2016, Somesh Naidu <Somesh.Naidu@citrix.com> wrote:

> First off, for datadisks, you may not explicitly need to move them around.
> If you detach it from the existing VM and attach it to another VM
> (essentially the host running that VM) that does not have access to the
> storage where the datadisk currently resides, then cloudstack will copy the
> datadisk to a storage accessible to that host.
>
> > I’m confused why we can’t snapshot a datadisk, which, if I understand
> > correctly, should then get copied to secondary storage, and then bring it
> > up on another host. I hope I’m just missing something obvious.
>
> You can snapshot a datadisk and the snapshot will reside on the secondary
> store, that bit is straight/correct.
>
> I do not understand what you mean when you say "bring it up on another
> host".
> The part that is not clear is what does "bring it up" mean? Also, what you
> mean by "host", hypervisor or storage? Do you mean the datadisks are
> bootable and you want to start them on a different host? If so, know that
> you can't launch a VM directly off of a snapshot, you’d have to convert it
> to a template and then launch a VM from it. The VM could be launched on any
> host - if this is the use-case/scenario you had in mind then yes, you will
> achieve what you need this way.
>
> Regards,
> Somesh
>
>
> -----Original Message-----
> From: technopathology@gmail.com <javascript:;> [mailto:
> technopathology@gmail.com <javascript:;>] On Behalf Of Douglas Land
> Sent: Wednesday, July 06, 2016 3:03 PM
> To: users@cloudstack.apache.org <javascript:;>
> Subject: Question about migrating local storage datadisks
>
> We use local storage for everything, including datadisks. We need to
> migrate these to another host, which docs all seem to say isn’t supported.
> I’m confused why we can’t snapshot a datadisk, which, if I understand
> correctly, should then get copied to secondary storage, and then bring it
> up on another host. I hope I’m just missing something obvious.
>

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