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In computing, virtualization means to create a virtual version of a device or resource,  such as a server, storage device or network.


Major applications of the concept of virtualization are:


Server Consolidation/ Hardware/Platform Virtualization:

  • At times servers sit idleas the workload is only on some of the servers on the network. This results in a waste of expensive hardware resources.
  • Server virtualizationattempts to increase resource utilization by partitioning physical servers into several multiple virtual servers, each running its own operating system and applications.
  • The operating system running on the machine will appear to have its own processor, memory and other components.
  • Server virtualization makes each virtual server look and act like  a  physical server. This is also known as “Physical-to-Virtual” or 'P2V' transformation.
  • The software that creates a virtual machine is called a hypervisor or Virtual Machine Manager.


Disaster Recovery: Virtual machines can be used as backup machines for physical servers. These Virtual machine can take over workload for a server experiencing an outage.

Testing and Training: Virtualization can create virtual server to isolate machine for testing and training.

Portable Applications: Portable applications can run from a removable drive, without installing it on the system's main disk drive.

Portable Workspaces: Virtualization can create portable workspaces on removable devices.


Some common types of virtualization are:

Hardware Virtualization



Network Virtualization: Network virtualization allows a large physical network to be provisioned into multiple smaller logical networks and conversely allows multiple physical network to be combined into a larger logical network.


It can also split bandwidth into channels, and each of which can be assigned (or reassigned) to a particular server or device.

Storage Virtualization:

Storage virtualization is pooling of data from multiple storage devices, even different types of storage devices can be pooled, into what appears to  be  a single device that  can be managed centrally.

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