On 05/14/2017 06:11 PM, Michael Hierweck wrote:
up to now to use LVM (thick) provisioning to provide virtual disks for
VMs: RAID => LVM => LV => DRBD => KVM/QEMU (virtio).
We would like to be able to take snapshots from our virtual disks in
order to be able to use them as readonly source to consistent backups.
Therefore we would need to introduce a LVM thin provisioning layer
somewhere.
Do I understand correctly that you are not planning to store the VM
images in a filesystem (on the host), but in (thin-provisioned) block-devices?
If yes, then you might also want to consider to use one of the COW-capable
image formats qemu supports (qcow2, qed) on an ordinary (XFS) filesystem
on the host.
Regards,
Lutz Vieweg
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