I evaluate deploying ovirt 4.2 on centos 7.5 with VDO dedup in production. When deploying gluster with cockpit, after selecting deduplication/compression, the option to have the brick thin provisioned is grayed out. As a result, gluster snapshots are not possible. : - Neither in CLI : "snapshot create: failed: Snapshot is supported only for thin provisioned LV. Ensure that all bricks of data are thinly provisioned LV. " - Nor through the scheduler in volume management : I see the icon "Volume snapshots are scheduled" but I do not see any being created. There are no snapshot creation failure message in the manager. So I have two questions : - At deployment, is changing the gdeploy option manually from thick to thin supported for a LV on VDO device(or even a good idea)? - Should I open a bug report?