Cloud Computing, delivery of computing as a service rather than a product, in which shared resources, software and information are efficiently provided to computers and other devices as a utility over a network. Parallel to this concept is an electricity grid, in which end-users consume power without needing to understand the component devices or infrastructure that is required to provide the service.
There are 3 most important services that are popularly provided amidst the others by Cloud. These services include SaaS (Software as a Service), IaaS (Infrastructure as a Service) and PaaS (Platform as a Service). Fulfilling an everlasting need of IT; it is a new way to increase capacity or add capabilities with no investment in new infrastructure, training new employees, or licensing new software.
A flexible infrastructure; extending IT's existing capabilities in real time over the Internet, Cloud computing encompasses any subscription-based or pay-per-use services. Cloud Computing has been generating a lot of buzz lately and there is a paradigm shift to cloud technology as well. The topic has been appearing frequently in technology blogs, magazines, and big technology outfits like HP, IBM, Microsoft, Google, and Amazon have all setup offerings to capitalize on the growing acceptance of Cloud based services, i.e. Cloud Computing.
Cloud Computing is believed to have drawn a symbolic reference to Internet as a ‘cloud’; effectiveness of the entire process lies in that the end-user do not need to possess any essential knowledge or organization of the physical location as also the configuration of the system that delivers the required services.
“Cloud Computing”, not just one particular service, rather it is a collection of offerings that provide customers with an opportunity to rent these services as opposed to spending large amount of capital to buy them upfront. These subscription, rent based model (RBM) appeals to the Small and Medium Size Enterprises (SMEs) and they are benefited the most from this shift.