Hardware Virtualization
Short Description
Virtualization
• Multiple consumers share a resource while maintaining the illusion that each consumer owns the full resource
– Memory, processor(s), storage, peripherals, entire machines
• Goes all the way back to Popek and Goldberg [1974]
• Virtual Machine Monitor (VMM) or hypervisor is the software layer that provides one or more Virtual Machine (VM) abstractions
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Example: Datacenter Consolidation
• Reduce total cost of ownership (TCO)
– Increased systems utilization (current servers have less than 10% average utilization, less than 50% peak utilization)
– Reduce hardware (25% of the TCO)
– Space, electricity, cooling (50% of the operating cost of a data center)
• Management simplification
– Dynamic provisioning
– Workload management/isolation
– Virtual machine migration
– Reconfiguration
• Better security
• Legacy compatibility
• Virtualization protects IT investment
• Virtualization is a true scalable multi-core work load
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