Explanation
A PersistentVolume (PV) is a piece of storage in the cluster that has been provisioned by an administrator.
PVs are volume plugins like Volumes, but have a lifecycle independent of any individual Pod that uses the PV.
A PersistentVolumeClaim (PVC) is a request for storage by a user. It is similar to a Pod. Pods consume node resources and PVCs consume PV resources.
If you intend to create Kubernetespersistent volumes, sufficient block volume quota must be available in each availability domain to meet the persistent volume claim. Persistent volume claims must request a minimum of
50 gigabytes
You can define and apply a persistent volume claim to yourcluster, which in turn creates a persistent volume that's bound to the claim. A claim is a block storage volume in the underlying IaaS provider that's durable and offers persistent storage, enabling your data to remain intact, regardless of whether the containers that the storage is connected to are terminated.
With Oracle Cloud Infrastructure as the underlying IaaS provider, you can provision persistent volume claims by attaching volumes from the Block Storage service


https://oracle.github.io/weblogic-kubernetes-operator/faq/oci-fss-pv/
https://kubernetes.io/docs/concepts/storage/persistent-volumes/