Q:

Does Proxmox VE Support LVM as block storage for KVM guests?

Does Proxmox VE Support LVM as block storage for KVM guests to avoid the overhead of going through the filesystem layer on the host system ?

A:

Yes.
Go into Datacenter > Storage > Add > LVM Group, specify an existing LVM volume group, and you are good to go.
New "disks" will be created as logical volumes on the LVM group you've specified.

