On Sun, Nov 22, 2015 at 6:14 PM, Johan Kooijman <mail@johankooijman.com> wrote:
> Hi all,
>
> I have about 100 old VM's in my cluster. They're powered down, ready for
> deletion. What I want to do is delete the VM's including disks without
> actually deleting the disk images from the storage array itself. Is that
> possible?

Select the vm, click "remove", in the confirmation dialog, uncheck the
"Delete disks"
checkbox, confirm.

> At the end I want to be able to delete the storage domain (which
> then should not hold any data, as far as ovirt is concerned).

Ovirt deleted the vms, but is keeping the disks, so the storage domain
does hold all
the disks.

>
> Reason for this: it's a ZFS pool with dedup enabled, deleting the images one
> by one will kill the array with 100% iowa for some time.

So what do you need is to destroy the storage domain, which will
remove all the entities
associated with it, but will keep  the storage without any change.

Do this:
1. Select the storage tab
2. select the domain
3. In the data center sub tab, click "maintenance"
4. When domain is in maintenance, click "detach"
5. Right click the domain and choose "destroy"

This will remove the storage domain from engine database, leaving
the contents of the domain.

You can now delete the contents using favorite system tools.

Now, if we want to add support for this in ovirt, how would you delete
the entire domain in a more efficient way?

Nir