Cloud Computing by Rajiv Chopra

Author:Rajiv Chopra
Language: eng
Format: epub
ISBN: 978-93-86286-91-8
Publisher: Mercury Learning and Information
Published: 2017-03-27T04:00:00+00:00

3.4 CREATING A VIRTUALIZED ARCHITECTURE

During virtualization, software known as a Virtual Machine Monitor (VMM) or a Hypervisor is used.

What is a Hypervisor?

A hypervisor is an operating system (OS) that knows how to act as a traffic policeman to guide processes in an orderly manner. It is set at the lowest levels of the hardware environment. In cloud computing, it is necessary to support several types of OSs and a hypervisor is the correct method to do this. It helps you to show and use the same application on several systems without having to physically copy that application onto each system. With virtualization technology, it is possible to use the hypervisor to split the physical computer’s resources. The resources can be split 50–50 or 80–20 between two guest operating systems. The advantage here is that the hypervisor does all the heavy lifting. The guest OS does not care that it is running in a virtual partition. It thinks it has the computer all to itself. There are three different types of hypervisors:

1.Native Hypervisors: They sit on the hardware platform directly. They give better performance to the end users.

2.Embedded Hypervisors: They are integrated into a CPU on a separate chip.

3.Hosted Hypervisors: They run as a different software layer above both the hardware and the OS. This type is useful for both private and public clouds because it improves performance.

Two different virtualization structures are thus formed as follows:

1.Hosted Virtualization.

2.Bare-Metal Virtualization.

Let’s study each of these structures with their pros and cons.

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