The allocation of storage resources is the same for all allocation models and is charged as capacity is allocated. The vCloud provider manages storage resource overcommitment by defining a maximum amount of storage that can be consumed within the organization virtual datacenter and by controlling whether storage is thin-provisioned (not pre-allocated) or thick-provisioned (pre-allocated in full).

A vCloud Director 5.1 feature provides multiple classes or tiers of storage capacity within an organization virtual datacenter. This allows an application owner to deploy a multitier application with different classes of storage for different tiers.