5. vCloud Resource Design : 5.4 Organization Virtual Datacenters : 5.4.1 Allocation Models : 5.4.1.2. Allocation Pool Model
   
5.4.1.2. Allocation Pool Model
An Allocation Pool is a pool of allocated resources with a certain percentage guaranteed. The percentage guaranteed directly translates into reservations configured on the sub-resource pool. The difference between the reservation and the limit are resources that can be oversubscribed. In Figure 11, two tenants have organization virtual datacenters with 75% guaranteed. Resource usage of the two tenants cannot exceed the combined total of the reserved resources (75% for each) plus the resources available for overcommitment (25%). The percentage of resources guaranteed is not visible to end-consumers, who only see the total resources allocated.
Figure 11. Allocation Pool