I've run into a similar problem when using VDO + LVM + XFS stacks, also with ZFS.

If you're trying to use ZFS on 4.4, my recommendation is don't. You have to run the testing branch at minimum, and quiet a few things just don't work.


As for VDO, i ran into this issue when using VDO and a NVME for LVM caching of the thin pool, VDO would throw a fit and under high load scenario, VM's would regularly pause. 

VDO with no cache was fine however, seems to be related to mixing device types / block sizes (even if you override block sizes).


Not sure if that helps.

On 2021-06-08 12:26, Strahil Nikolov via Users wrote:

Maybe the shard xlator cannot cope with the speed of the shard creation speed.
 
Are you using preallocated disks on the Zimbra VM ?
 
Best Regards,
Strahil Nikolov

On Tue, Jun 8, 2021 at 17:57, José Ferradeira via Users
<users@ovirt.org> wrote:
Hello,
 
running ovirt 4.4.4.7-1.el8 and gluster 8.3.
When i performe a restore of Zimbra Collaboration Email with features.shard on, the VM pauses with an unknown storage error.
When I performe a restore of Zimbra Collaboration Email with features.shard off, it fills all the gluster storage domain disks.
 
With older versions of gluster and ovirt the same happens. If I use a NFS storage domain it runs OK.
 
 
 
--

Jose Ferradeira
http://www.logicworks.pt
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