The nfs-provisioner dynamically creates persistent volumes on the K8s node where a database instance is deployed. The provisioner type is really dependent on the infrastructure (ie. under cloud) being used for the ONAP deployment. Therefore, it should be possible to configure the PV solution to use. This will be possible once OOM-722 is complete, as it allows use to move the  PV definition to the top-level ONAP parent chart. It can then be referenced by PVCs to acquire the storage needed for each application.