When you deploy the vCenter Server appliance, you can select to
deploy an appliance that is suitable for the size of your vSphere environment.
The option that you select determines the number of CPUs and the amount of
memory for the appliance.
The hardware requirements for a vCenter Server appliance depend
on the size of your vSphere inventory
Storage
Requirements for the vCenter Server Appliance
When you deploy the vCenter
Server appliance, the ESXi host or DRS cluster on which you
deploy the appliance must meet minimum storage requirements. The required
storage depends not only on the size of the vSphere environment and the storage
size, but also on the disk provisioning mode.
The storage requirements are
different for each vSphere environment size and depend on your database size
requirements
For information about the
requirements for network client machine,