W12 - Virtual Machine

Question 1

Name the 2 main Virtual Machine Manager (VMM).

Answer 1

Type 1 hypervisors

Type 2 hypervisors

Question 2

Type 1 hypervisor.

Answer 2

Run in kernel.
Implement device drivers for host HW.
Provide transition OS services like SPU and memory management.

Question 3

Type 2 hypervisor.

Answer 3

Very little OS involvement in virtualization.
Poor overall performance.
Pro in a sense that it does not require changes to host OS.

Question 4

Describe paravirtualization.

Answer 4

Guest operating system is modified to work in cooperation with the VMM to optimize performance.
Increased performance.
Less needed as hardware support for VMs grows.

Question 5

Briefly describe Application Containment.

Answer 5

Segregates applications from the OS, making them more secure, manageable.
Can do these things without full-fledged virtualization.

Question 6

Describe one major advantage to most virtualization implementations.

Answer 6

Ability to freeze (suspend) a running virtual machine.
Allows copies or snapshots to be made of the guest.
Copy can be used to create new VM or transferred to another machine.