[Users] oVirt 3.5 planning

[Ayal Baron]

----- Original Message -----
> On 02/25/2014 03:30 PM, Sven Kieske wrote:
> > Well, afaik the current workflow is like this:
> >
> > I have iso domain (hosted on NFS server) a, attached to host b.
> >
> > On host b I got vms c,d and e.
> >
> > When I attach an ISO from a to c, the iso gets
> > copied from the NFS server to /var/run/vdsm/payload/{UUID}/..
> >
> > When I attach the same ISO file from a to d the very same iso
> > file gets copied again to /var/run/vdsm/payload/{UUID_2}/ from
> > the NFS server.
> 
> linked, not copied?!

I think this needs to be stressed to prevent any misunderstanding.  There is NO data copy going on, a simple symbolic link is all.

> 
> >
> > This is unnecessary because there is already a copy of the iso in
> > the locale filesystem, so it would be cool if this is stored in a
> > way that multiple vms on the same host can utilize the same iso file
> > without downloading it multiple times.
> >
> > I hope I described the workflow in a correct way.
> > If this is done already I am not aware of it, so please correct
> > me if I'm wrong.
> >
> > An additional side effect would be that you can utilize this locally
> > stored iso files while the NFS server or the ISO Domain is in
> > maintenance mode for some reason. Or if you have a network maintenance
> > for the network path which leads to the ISO Domain.
> >
> > Of course this just works if the host has enough ram or dedicated local
> > storage to store these copies.
> >
> > I know that you can circumvent this, by using a locally created ISO
> > Domain on the host itself. But then you lose the ability of sharing
> > this ISO domain with different DCs, don't you?
> >
> >
> > Am 25.02.2014 14:16, schrieb Itamar Heim:
> >> On 02/25/2014 11:55 AM, Sven Kieske wrote:
> >>> RFE: Allow multiple local storage domains/ hosts within a cluster
> >>> with automigration via export domains (vm has to be shut down)
> >>> I will write a detailed BZ for this.
> >>
> >> this can only happen after we finish the removal of storage pool aspects
> >> (which is currently being worked on)
> >>
> >>>
> >>> RFE: temporary copys of iso-images on hosts which get mounted from
> >>> iso domains into vms, this would allow to detach an iso domain while
> >>> isos are attached and would also lower network traffic when an iso
> >>
> >> what's the use case for detaching an iso domain making this worth while?
> >> (it will also kill live migration, or force it to become live storage
> >> migration for the iso)
> >
> >
> 
> _______________________________________________
> Users mailing list
> Users at ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>