In the admin documentation it states at section 13.2.3 that over-provisioning is only supported for NFS?
Is this correct? with kvm/qcow2 I often have qcow2 files that never grow beyond 1-5GB even though the underlying qcow2 file can grow to 100GB. If I remember correctly in 3.0.x of cloudstack setting the over-provisioning factor to 3 or whatever would work. Is this not the case anymore? -Bryan