[Engine-devel] move disk command

[Miki Kenneth]

----- Original Message -----
> From: "Omer Frenkel" <ofrenkel at redhat.com>
> To: "Jon Choate" <jchoate at redhat.com>
> Cc: engine-devel at ovirt.org
> Sent: Tuesday, January 17, 2012 10:41:43 AM
> Subject: Re: [Engine-devel] move disk command
> 
> 
> 
> ----- Original Message -----
> > From: "Jon Choate" <jchoate at redhat.com>
> > To: "Ayal Baron" <abaron at redhat.com>
> > Cc: engine-devel at ovirt.org
> > Sent: Monday, January 16, 2012 9:39:55 PM
> > Subject: Re: [Engine-devel] move disk command
> > 
> > On 01/16/2012 02:26 PM, Ayal Baron wrote:
> > >
> > > ----- Original Message -----
> > >> On 01/16/2012 05:26 PM, Jon Choate wrote:
> > >>> As part of the multiple storage domains feature there will be
> > >>> new
> > >>> functionality added to allow users to move individual disks.
> > >>>
> > >>> What are the prerequisites for moving a disk?
> > >>>
> > >>> 1) the disk must exist
> > >>> 2) the associated VM must be down
> > >> this can't just be a CanDoAction check - the lock has to be real
> > >> to
> > >> prevent a race from starting the VM after the validation.
> > >>
> > > Either down or disk is unplugged.
> > >
> > >>> 3) the associated VM must not be locked
> > >>> 4) the source storage domain must exist
> > >>> 5) the source storage domain must be available
> > >>> 6) the target domain must exist
> > >>> 7) the target domain must be available
> > >>> 8) the target domain must have adequate disk space
> > >>> 9) the target domain cannot be an ISO or export domain
> > >>> 10) the source domain cannot be an ISO or export domain
> > > This may be unrelated, but user would be allowed to export and
> > > import a floating disk, right?
> > > I would like the ability to import *any* disk in the export
> > > domain
> > > as a floating disk, but in the least, export and import disks not
> > > associated with a VM.
> 
> you are right, it is unrelated, this thread is about move disk of a
> vm between SDs,
> export and import is copy, and floating disks is part of the shared
> disk feature,
> this indeed need to be discussed in that scope.
So what is the behavior of a move of a floating disk? can I move any type of disk?
(shared?) between SDs? 
> 
> > This was not in scope for the work I am currently doing.  If this
> > is
> > something desirable I think it needs to be prioritized and worked
> > in
> > at
> > a later time.  If it does need to happen now then we are going to
> > need
> > to be able to do full crud for a floating disk I would think.
> > 
> > >> user must provide same/other quota for the target domain which
> > >> has
> > >> enough quota left for the requested size.
> > >>
> > >>> What am I missing?
> > >>>
> > >>> Also, should we allow the moving of a template disk that has VM
> > >>> disks based on it? Unless I'm wrong this would require all of
> > >>> the
> > >>> disks based on the template to be moved as well.
> > >> I'd say no. you can only move a template disk if it is not used.
> > >> I'd go further and say one should copy the template disk and
> > >> delete,
> > >> rather than support move for it at all (not relevant for VM
> > >> disk,
> > >> since
> > >> we don't have the same concept of multiple copies for it).
> > > As long as you can delete a copy of the disk from a domain where
> > > there are no VM disks derived from it.
> > >
> > >>> thoughts?
> > >>> _______________________________________________
> > >>> Engine-devel mailing list
> > >>> Engine-devel at ovirt.org
> > >>> http://lists.ovirt.org/mailman/listinfo/engine-devel
> > >> _______________________________________________
> > >> Engine-devel mailing list
> > >> Engine-devel at ovirt.org
> > >> http://lists.ovirt.org/mailman/listinfo/engine-devel
> > >>
> > 
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