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 Cloud Computing:

Moving to the cloud. Running in the cloud. Stored in the cloud. Accessed from the cloud: these days is seems like everything is happening “in the cloud”. But what exactly is this nebulous concept?

The short answer is that it's somewhere at the other end of your internet connection – a place where you can access apps and services, and where your data can be stored securely. The cloud is a big deal for three reasons:

It doesn't need any effort on your part to maintain or manage it.

It's effectively infinite in size, so you don't need to worry about it running out of capacity.

You can access cloud-based applications and services from anywhere – all you need is a device with an internet connection.

This is important because there's a shift going on from office-based work to working on the move. This shift is reflected in computer hardware sales: In 2015 about 270 million desktop and laptop computers will be sold, compared to 325 million tablets and almost 2 billion smartphones.

 

Virtualization in Cloud Computing :

Virtualization is the "creation of a virtual (rather than actual) version of something, such as a server, a desktop, a storage device, an operating system or network resources".

In other words, Virtualization is a technique, which allows to share a single physical instance of a resource or an application among multiple customers and organizations. It does by assigning a logical name to a physical storage and providing a pointer to that physical resource when demanded.

Types of Virtualization:

            1)Hardware Virtualization.

             2)Operating system Virtualization.

             3)Server Virtualization.

             4)Storage Virtualization.

1) Hardware Virtualization:

When the virtual machine software or virtual machine manager (VMM) is directly installed on the hardware system is known as hardware virtualization.

The main job of hypervisor is to control and monitoring the processor, memory and other hardware resources.

After virtualization of hardware system we can install different operating system on it and run different applications on those OS.

Usage:

Hardware virtualization is mainly done for the server platforms, because controlling virtual machines is much easier than controlling a physical server.

2) Operating System Virtualization:

When the virtual machine software or virtual machine manager (VMM) is installed on the Host operating system instead of directly on the hardware system is known as operating system virtualization.

Usage:

Operating System Virtualization is mainly used for testing the applications on different platforms of OS.

3) Server Virtualization:

When the virtual machine software or virtual machine manager (VMM) is directly installed on the Server system is known as server virtualization.

Usage:

Server virtualization is done because a single physical server can be divided into multiple servers on the demand basis and for balancing the load.

4) Storage Virtualization:

Storage virtualization is the process of grouping the physical storage from multiple network storage devices so that it looks like a single storage device.

Storage virtualization is also implemented by using software application

Usage:

Storage virtualization is mainly done for back-up and recovery purposes.

 

Conclusion:

Mainly Virtualization means, running multiple operating systems on a single machine but sharing all the hardware resources. And it helps us to provide the pool of IT resources so that we can share these IT resources in order get benefits in the business.