BRIEF OF VIRTUALISATION

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VIRTUALIZATION

Virtualization is the way through which you can create many environments by which you can run different operating systems on one platform. It is the layer which is abstracted from the systems that uses System hardware more efficiently . In Virtualization it is seems to us that the virtual machine we are working on our host operating systems , is the dedicated machine.

A computer machine has basically three major and huge terms which are more significant are listed below:

  1. Computation.
  2. Storage.
  3. Network.



People uses Virtualization for many purposes. Many people uses it to run application programs which is meant to that operating systems(on which they are not working ) without being reboot from the host operating systems .




Virtualization is achieved through Hypervisor which are also of two types , usage of them are depending on the conditions which are listed down below:

Types of Hypervisor : Type-1 and Type-2.

Type-1 Hypervisor are used in case of your Bare metal(BM) just like your laptop without have any operating system running in it  or the Servers which are running in everywhere .



As above shown picture dictates us how type-1 hypervisor is used to running different virtual machines on the Bare metal Hardware. 

For example :-Citrix/Xen Server ,VMWare EXSi (Elastic Sky X integrated) and Microsoft Hyper-V, KVM(kernel virtual machine).
Now,
Type-2 Hypervisor are used  for physical machine which have to work on other (host) operating systems.


As from above you see , that the host machine has its own operating systems and type-2 Hypervisor is helping to achieving to set up the Virtual Machine (which are running simultaneously).

For Example :- Microsoft Virtual PC ,Oracle Virtual Box, VMWare Workstation, Oracle Solaris Zones, VMware Fusion, Oracle VM Server for x86.


As there is a problem in using the type-2 Hypervisor which is of Latency .
From the above type -2 hypervisor Image you can see that if we are doing some kind of computation in our virtual machine Which is working on some operating System , then it has to move from the layer which is below :-

Operating System on virtual machine--->Virtual Machine---->Hypervisor---> operating System(Host)--->Hardware

from the above mention stages, latency of execution come which is not when we use type-1 Hypervisor because in that stages reduced to below mention ones':-

Operating System on virtual machine --->Virtual Machine--->Hardware(Server)

which reduces the problem of Latency thus helpful in doing computations.
 


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