The service definition states that 50% of the virtual machines use the Reservation Pool model and 50% use the Pay-As-You-Go allocation model. The thing model is applied to small, medium, and large pools with a respective split of 75%, 20%, and 5%. Therefore, small represents 37.5% of the total, medium represents 10% of the total, and large represents 2.5% of the total number of virtual machines in the environment.

Table 4 following table lists the virtual machine count for the various virtual datacenters. The total virtual machine count of 1,500 reflects the specifications outlined in Service Definitions for the public vCloud service definition. Change this total to reflect your own target virtual machine count.

 

Note: Some total virtual machine values are rounded up or down due to percentages.

Service Definitions also calls out the distribution for virtual machines in the vCloud with 45% small, 35% medium, 15% large, and 5% extra large. The following table shows the total amount of CPU, memory, storage, and networking needed.

 

Before determining your final sizing numbers, refer to VMware design guidelines for common consolidation ratios. The following table shows what the final numbers might look like using typical consolidation ratios seen in field deployments.

 

Sixteen hosts with the following configuration can support the required capacity:

These calculations do not factor in storage consumed by consumer or provider templates, nor do they take into account the resources consumed by vCloud Networking and Security Edge (Edge) appliances. An Edge device backs each private organization virtual datacenter network and external routed organization virtual datacenter network.

The specifications for each Edge appliance are.