Virtualization and its TypesVirtualization is a term that refers to the abstraction of computer resources

Types of virtualization:

• Application Virtualization

• Sever Virtualization

• Platform Virtualization

• Network Virtualization

• Memory Virtualization

• Desktop Virtualization

Application Virtualization• Application virtualization describes software technologies

that improve portability, manageability and compatibility of applications by encapsulating them from the underlying operating system on which they are executed.

• A fully virtualized application is not installed in the traditional sense, although it is still executed as if it is.

• The application is fooled at runtime into believing that it is directly interfacing with the original operating system and all the resources managed by it, when in reality it is not.

• The Operating System components that surround an application (e.g. registry, file system etc.) are virtualized, not the application itself.

Benefits• Allows applications to run in environments that do not suit the

native application (e.g. Wine allows Microsoft Windows applications to run on Linux).

• May protect the operating system and other applications from poorly written or buggy code.

• Uses fewer resources than a separate virtual machine.

• Run applications that are not written correctly.

• Run incompatible applications side-by-side, at the same time and with minimal regression testing against one another.

• Maintain a standard configuration in the underlying operating system across multiple computers in an organization, regardless of the applications being used, thereby keeping costs down.

Server VirtualizationServer virtualization is the masking of server resources, including the number and identity of individual physical servers, processors, and operating systems, from server users.

The server administrator uses a software application to divide one physical server into multiple isolated virtual environments.

The virtual environments are sometimes called virtual private servers, but they are also known as guests, instances, containers or emulations.

Benefits• Lower number of physical servers - reduce hardware

maintenance costs because of a lower number of physical servers.

• By implementing a server consolidation strategy, increase the space utilization efficiency in data center.

• By having each application within its own virtual server prevent one application from impacting another application when upgrades or changes are made.

• Develop a standard virtual server build that can be easily duplicated which will speed up server deployment.

• Deploy multiple operating system technologies on a single hardware platform (i.e. Windows Server 2003, Linux, Windows 2000, etc).

Hyper-VMicrosoft Hyper-V, codenamed Viridian, formerly known as Windows Server Virtualization, is a hypervisor-based virtualization system for x86-64 systems. A beta version of Hyper-V was shipped with certain x64 editions of Windows Server 2008, and the finalized version (automatically updated through Windows Update) was released on 26 June 2008.

A free stand-alone version of Hyper-V, called "Microsoft Hyper-V Server 2008" was released on October 1, 2008, which is a variant of Windows Server 2008 "Core" that includes full Hyper-V functionality; other Windows 2008 Server Roles are disabled, and there are limited Windows Services.

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