Cloud computing

Introduction
when we talk about the computing data plays a major roll on it.So from the begining we used so device to store our data .In previous ages those devices were low in capacity,bulk and high in expensive.But these were developed step by step .So what will happen in the future?
the future is directed to "cloud based computing".
Cloud computing is a on demand service which provides IT resources and service from application to data centre over the internet.We can find three major Section in cloud computing
Software as a service(SaaS)
Infrastructure as a service(IaaS)
Platform as a service(PaaS)

On this article I am not going to explain these three .purpose of this article is to share some  basic ideas on cloud computing.

Characteristics

On demand self service
Broad network access
Resource pooling
Rapid elasticity
Measured service

Goals & Benefits

Flexibility
Cloud service provides employees with flexible service.They can add or remove features and user from cloud according to their needs.

Cost saving
All most  all the cloud services are pay-as-you-go system.So nobody need to pay for what they have not used.Hence enterprise users can get their products to market with out worrying  infrastructure cost.
Disaster recovery
The entire server,including the operating system, applications, patches and data are encapsulated into a single software bundle or virtual server. This virtual server can be copied or backed up to an different data center and spun up on a virtual host in a matter of minutes in the event of a disaster.