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.

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.

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.

----- 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?

----- Original Message ----- > From: "Itamar Heim" <iheim(a)redhat.com&gt; > To: "Gilad Chaplik" <gchaplik(a)redhat.com&gt; > Cc: "Jorick Astrego" <j.astrego(a)netbulae.eu&gt;, "users" <users(a)ovirt.org&gt; > Sent: Sunday, April 6, 2014 7:06:51 PM > Subject: Re: [Users] scheduling storage migration > > On 04/06/2014 06:16 PM, Gilad Chaplik wrote: >> ----- 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? > > you can't move things around not via engine or you will lose the sync > between them > sure, meant using the python SDK within the hook (the trigger).