Re: [libvirt] [PATCH] ZFS: Support sparse volumes
On 03/05/2016 08:35 AM, Roman Bogorodskiy wrote:
What if allocation specified will be much larger than capacity?
Neither zfs nor virStorageBackendZFSCreateVol() prevent from creating a
volume with:
--capacity 2G --allocation 4G
Is this necessary to support? I don't see a use case where this is
helpful. If not, the easy solution seems to be to prohibit it.
If you really want to support this, then I suppose we can just remove
the clamping, which leads to...
What's the reason to limit displayed allocation?
I didn't want --capacity 1G --allocation 1G to show as 1.03G allocation.
PS I noticed that it could be an issue to set refreservation larger
than
volsize with ZFS on Linux:
https://github.com/zfsonlinux/zfs/issues/2468.
The issue is still open and at this moment I cannot check if I can
reproduce that on Linux.
I can reproduce this. Setting the refreservation as part of the initial
`zfs create` works, but it is not possible to do with `zfs set` later.
--
Richard