VMware has finally delivered the update to its core virtualization platform, announcing that vSphere 4 is generally available worldwide, positions as a "cloud operating system" that will allow companies to centrally manage servers, storage and networks in their data center as if they were one big computer. A new feature called VMware Fault Tolerance can create a live replica of an application on a different server that can be used in the event of a hardware failure. Also new is vStorage Thin Provisioning, which allows less physical storage to be allocated to a virtual machine, and Distributed Power Management, which can consolidate virtual machines onto fewer machines during periods of low usage.

More info: PC World