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virtualization

Virtualisation Classification

I have been reading virtualisation where i came across many types of virtualisation technique Now i am confused about the types Here is my understanding of classifying virtualisation

  1. Type 1(bare metal virtualisation)

    1.1 Full virtualisation

    1.2 para virtualisation

    1.3 hardware assisted virtualisation

  2. Type 2(host based virtualisation)

Am i correct??

I have searched internet but was not able to find satisfactory answers

Solution

  • Virtualization is a very broad term. There can be many components in IT world which can be virtualized. Most common types of virtualization are:

    • OS Virtualization
    • Application Virtualization
    • Network Virtualization
    • Hardware Virtualization
    • Storage Virtualization

    The terms you have mentioned (Type 1 and Type 2) are type of Hypervisors. Hypervisor can be thought of as an intermediate entity between a physical machine and virtual machine. Simply put hypervisor is the Virtualization enabler.

    Hypervisor can virtualize physical resources using different techniques:

    1. It can be done by making hypervisor part of Kernel which is called Full virtualization
    2. Modifying the guest OS which can leverage hypervisor to intercept the calls made by VM to the physical resources. This is called paravirtualization.
    3. Hardware itself can be modified like AMD-V or Inter VT-x processors to enable virtualization. In such case it is hardware assisted virtualization.

    I hope it clarifies your doubt.