If a PVC lays claim to a PV partially (10 GB out of 20 GB PV), can another PVC lay claim to the remaining part of PV?
If you are referring to a situation without dynamic PVs, no. A PVC will always get the full PV. In your example, the PVC for 10G would get the full 20G of the PV. The claim will get a PV that is at least the size of the request but always take the full PV. The relationship of PVs to PVCs is 1:1. This is why dynamic PVs are important; it allows for creation of persistent volumes that match the actual claim size.
Hi Rahul. No. You cannot have a single PV of 20G and have two PVC objects claim two separate 10G chunks of it.