Next thing I am noticing that garbage collection is not able to coalesce vdi to vms that are running. garbage will keep trying to run every 30 - 45 seconds for 30 seconds run time. VDIs to coalesce will keep increasing unless a vm is powered off and given enough time for garbage collection to actually run.
Because garbage collection is spamming so often importing a vdi for health check will take logger.
Different use cases: Ceph is better with more hosts (at least 6 or 7 minimum) while XOSTOR is better between 3 to 7/8.
We might have better Ceph support in the future for large clusters.