Re: [Users] scheduling storage migration

----- Original Message ----- > From: "Itamar Heim" <iheim(a)redhat.com&gt; > To: "Jorick Astrego" <j.astrego(a)netbulae.eu&gt; > Cc: "users" <users(a)ovirt.org&gt; > 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?