About

Rather than being real, i.e., made ​​of real computer hardware and running a specific operating system, a virtual machine (VM) is a "dummy" computer created by a simulation program. Its memory, processor and other resources are virtualized. It is a way of dividing the resources of a computer into multiple execution environments.

Advantages of VMs:

  • Facilitates the development and testing of new operating systems.
  • Allows comparison of multiple operating systems using the same equipment.
  • Runs different operating systems on the same hardware simultaneously.
  • Simulates changes and hardware failures or reconfiguration of tests an operating system, providing reliability and scalability to applications.
  • Reduction in hardware costs.
  • Facilitates in the management, replication and migration of computers, applications or operating systems.
  • Reliability and availability: a software failure in a VM does not affect other services running on the host operating system.
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