Improved large-scale management is possible with vCenter Server since it is designed from the ground up to handle the largest IT environments. A single instance of vCenter Server 4.0 manages up to 300 hosts and 3000 virtual machines and with Linked Mode you can manage up to 1,000 hosts and 10,000 virtual machines across 10 vCenter Server instances. VMware HA and DRS clusters can support up to 32 hosts. All vCenter Server instances in a linked‐mode group can access a common view of the global data. The vSphere Client connects to other vCenter Servers using the connection information retrieved from ADAM.
With Linked mode it’s possible to create global role definitions, searches for inventory items across multiple vCenter Server instances, and a license model across multiple vCenter Servers.
