Virtualization

Virtualization

the process of using software known as the hypervisor to allocate hardware for more efficient usage of the operating system

What does virtualization enable the user to do?

Allows multiple operating systems to run concurrently on one physical machine and to deploy multiple virtual images

What is the benefit of using virtualization?

Enables the user to ensure that a program is capable of being cross-platform (work on multiple operating systems)

Type 1 (Bare-metal) hypervisors

a layer of software installed directly on top of a physical server and its underlying hardware

What is the benefit of using type 1 (bare-metal) hypervisors?

No pre-existing operating system, so 100% of hardware resources can be given to virtual machines (VMs)

Where are type 1 (bare-metal) hypervisors typically reserved for?

Servers & the cloud

Type 2 (hosted) hypervisors

exists on an operating system, relying on the host machine’s pre-existing operating systems to manage calls to CPU, memory, storage, and network resources

What are type 2 (hosted) hypervisors used for?

Typical set-up for workstations/end user devices

What does the Host OS contribute through a type 2 (hosted) hypervisor?

Portion of CPU and ram resources to guest OS

What does the Guest OS contribute through a type 2 (hosted) hypervisor?

virtualization to new operating systems