[ovirt-users] storage offload capability

[Paul Jansen]

Thanks Itamar.I heard the other day that NFS v4.2 is supposed to contain server side copy, so it's possible that we might see this kind of support in one of more storage domain available to ovirt at some stage perhaps next year (in Fedora at least).Is this something that Gluster will also likely provide in a subsequent release once we have proper gfapi support?
I'd be interested to hear if others on the list are clamouring for server side offload support in some form.

      From: Itamar Heim
 To: Paul Jansen ; users 
 Sent: Saturday, 13 December 2014, 2:16
 Subject: Re: [ovirt-users] storage offload capability
   
On 11/13/2014 06:09 AM, Paul Jansen wrote:


> I have an ovirt 3.5 cluster set up with three el7 hosts.  Storage is
> provided by two Fedora 20 machines and the connection is via multipath
> iscsi.
> The performance is quite good.  The Fedora 20 iscsi targets are using
> the 'target' (ie: lio) framework, which support the various t.10 scsi
> offloads.  Vmware supports a subset of these called VAAI and Microsoft
> has a subset called ODX.
> Cloning is one if the t.10 extensions that the lio target framework
> supports.
> I just tried cloning a vm and noticed that during the process there is a
> lof of traffic over the iscsi interfaces on the Storage Pool Manager
> host and the iscsi target machine.
> With proper support for t.10 cloning I shoudn't see any traffic on the
> isci links (or very minimal traffic)
> Is there some way to enable the storage offload functionality in Ovirt?
> If not, is this on the VDSM roadmap?  If support were worked in this
> should be able to be applied to FCP connections as well.  The lio target
> supports these offloads when acting as a Fiber Channel target also.
>
> I've asked this sometime back but there hasn't been much in the way of
> discussion on this users list or the devel list about this feature.
>

yes, on the roadmap, tbd yet on when. netapp did a plugin enabling this 
for their storage array (VSC plugin)
I hope the ceph integration will provide this, though that doesn't solve 
it for other type of storage domains yet.



  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20141215/7280fe9d/attachment-0001.html>