*Separate management from raw cloud resources.
*Underlying VSphere clusters should be split into two logical groups:
-A single management cluster running all core component and services needed to run the cloud.
-Remaining available Vcenter cluster should be aggregated into a resource pool called “Cloud consumer resource”.
The question is why should vsphere resource be separated and divided single organization units?
*Ensuring management cluster resources are for manageability.
*Reducing overhead for cloud consumer resources and allocation for client usage and consumption requirements.
* Dedicate resource for private/public separation cloud requirements.
VMware vCloud Director 5.1 Performance and Best Practices: