Virtualization

·       Virtualization is the technology to generate virtual instances of computer resources for multiple uses of the same physical resource.

Types of virtualization

Operating System Virtualization

In operating system virtualization, the virtual machine software installs in the operating system of the host rather than directly on the hardware system.

Types:

·       Linux OS Virtualization
·       Windows OS virtualizations

Hardware Virtualization

In hardware virtualizations, virtual machine software installs in the hardware system and then it is known as hardware virtualization.
It consists of a hypervisor which use to control and monitor the process, memory, and other hardware resources.

Software Virtualization

Software Visualization in Cloud Computing allows the single computer server to run one or more virtual environments.

Storage Virtualization

In storage virtualization, a grouping is done of physical storage which is from multiple network storage devices this is done so it looks like a single storage device.
Storage virtualization is done for the backup and recovery process.

Server Virtualization

In server virtualization, the software directly installs on the server system and use for a single physical server can divide into many servers on the demand basis and balance the load.
Hypervisor
The hypervisor uses to enable server virtualization in Cloud Computing
A hypervisor is often termed as a Virtual Machine Manager (VMM)

Types:
·       Bare Metal Hypervisor
·       Hosted Hypervisor

Type one is the bare-metal hypervisor that are deployed directly over the host's system hardware without any underlying operating systems or software

Eg:- Microsoft Hyper-V hypervisor, VMware ESXi, Citrix XenServer.

Type two is a hosted hypervisor that runs as a software layer within a physical operating system.

Eg:- Parallels Desktop and VMware Player