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Introduction Of Virtual Machine

posted Jan 7, 2010, 10:28 AM by Thiyagaraaj M   [ updated Feb 15, 2012, 4:03 AM by Thiyagaraaj Mp ]

Definition:

A virtual machine (VM) is an environment, usually a program or operating system, which does not physically exist but is created within another environment.

Means

Something Not Physical
(or)
Something Refers To An Image

What?

  • Software implementation of a machine
  • Executes programs like a real machine.

Why?

  • Multiple OS environments can co-exist on the same computer
  • Software Maintenance & Testing
  • Performance Comparing

Virtual Hard Disk

  • It is One of the File System
  • Store virtual operating systems
  • Duplicate Hardware.

Virtual Hard Disk Features

  • Moving files between a VHD and the host file system
  • Backup and recovery
  • Antivirus and security
  • Image management and patching
  • Life-cycle management and provisioning

Virtual Operating System Flavors

Virtual Machine