[Users] scheduling storage migration

[Gilad Chaplik]

----- Original Message -----
> From: "Itamar Heim" <iheim at redhat.com>
> To: "Jorick Astrego" <j.astrego at netbulae.eu>
> Cc: "users" <users at ovirt.org>
> Sent: Friday, April 4, 2014 3:52:01 PM
> Subject: Re: [Users] scheduling storage migration
> 
> On 04/04/2014 03:34 PM, Jorick Astrego wrote:
> >
> > On Fri, 2014-04-04 at 15:02 +0300, Itamar Heim wrote:
> >> On 04/04/2014 10:51 AM, Jorick Astrego wrote:
> >> > Hi,
> >> >
> >> > I don't know if it's possible yet but can we schedule the (live) storage
> >> > migration?
> >> >
> >> > It would be awesome to have for example some VM data on SSD storage that
> >> > migrates to HDD storage when the VM is shutdown. Or have VM's with high
> >> > IO load during specific times migrate to a high IO storage domain during
> >> > these hours.
> >>
> >> if the VM is down, you can move it, not (live) storage migration.
> >> >
> >> > I realize it will generate extra load while migrating but this can be
> >> > planned for. Maybe the guys from glusterfs could enable storage
> >> > migration on their side so the migration can execute on the storage
> >> > server triggered by ovirt, that would be even better performance wise.
> >>
> >> in any case, you can script anything with the API...
> >>
> >
> > I was being lazy... So I can use the
> > http://www.ovirt.org/Features/oVirtSchedulerAPI for this? Or do I have
> > to hack around with the engine api. I will spend some time diving into it.
> 
> you can use the scheduler api, but I don't remember it having an event
> for OnVmStop.
> you can also use it for a periodic "balancing" call, but for that, you
> can also just use cron.
> in either case you will need to do the relevant api calls for moving the
> disks around. i'd go with the cron approach.

What about a vdsm hook?

Thanks, 
Gilad.

> 
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