Architecting a vCloud Director Solution : Deployment Model Considerations : 3.1 Service Offerings : 3.1.5 Consumption Models : 3.1.5.1 On-Demand Cloud
   
3.1.5.1 On-Demand Cloud
The customer does not subscribe to cloud resources up front, and pays based only on consumption. This is usually beneficial for bursty or seasonal workloads, which scale up and down in time. The customer consumes the resources from a seemingly infinite pool that the provider must maintain. Predicting such demand might be challenging for the provider. Therefore, the provider compensates by making such resources more expensive or more oversubscribed.
This offering directly maps to the organization virtual data center (Org VDC) pay-as-you-go allocation model.