Run multiple operating system on one physical machine Fully utilize server resources Shared data is cluster-ready for failover and redundancy	Fault and security isolation at hardware level CPU,RAM,Disk and network resources controls perserve performance Establised service levels	Entire state of the VM is encapsulated: Memory, disk images, I/O Device state VM state can be saved to a file - "check pointing," "Suspend/Resume" Re-use or transfer whole VMs with a file copy

We have developed a utility approach whereas the elements of the infrastructure that were once disparate are now integrated into a highly available services backbone.