Cloud Computing: Types, Topologies, Virtual Machine and VM Migration for decrease in power consumption

Abstract

As the usage of internet is increasing day by day, more and more people are now getting connected with the web. In the last few years, internet has become a powerful platform that has changed the way to do a business and the way of communication. The number of users which were using the services of internet in last ten years is becoming double in the number, in every two years. As the number of users is increasing the more storage and new technologies and new platform to develop software are on a huge demand. Then cloud computing came into the picture, which is providing huge storage capacity, on demand self-service, pay according to usage, flexible pricing, resource pooling, software for users and services on their demand which can be accessed anywhere (SaaS), platform to develop new software (PaaS), any hardware which is required for development (IaaS). Now even XaaS i.e. everything as a service (here X is considered as everything, its value can be any) is also coming into the picture. To run one or more than one services or applications together but in their separated space or partition, we need virtual machine. It is refer to the one instance of an operating system (Guest OS). Then Virtualization makes it possible to run many operating systems and applications on the same physical computer at the same time. It makes the physical system energy efficient, as many machines or applications are able to run all together, in a way it consumes less energy. To make the physical system more energy efficient, migration of virtual machine is done, so that we can reduce the energy consumption. VM Migration is used for migration of virtual machine from one PM (physical machine) to another physical machine or host. In this paper, we will discuss about the introduction of cloud computing-its types and topologies; and the main focus would be on energy efficiency using VM migration.