Virtualization

Requires running VM Monitor (Hypervisor) on the host, bare-metal machine. Coordinates host machine resource sharing.

Types of Hypervisors

Type1

Type2

Benefits

• cheaper than bare-metal
• isolation (guest OS is fully isolated from host and other guest OSes)
• 'easy' migration
• HA

Drawbacks

• performance overhead
• sometimes host performs overprovisioning, which can cause serious performance degradation
• Hypervisor is a single point of failure
• extra management