What Is Cloud computing

      

What is Cloud Computing?

Generally Cloud computing means storage internet services data through cloud.  Now a days the most part of the world’s get an access of the internet, the general term of  cloud computing for anything that involves delivering hosted services over the Internet. For example: youtube, facebook, ebay etc .

There is  private or public cloud. Public cloud sells services through Internet to it’s customer. (Currently, Amazon Web Services is the largest public cloud provider.) In the current world most of the business run through internet where they has to hired some IT specialist and needs software however, cloud computing is help to reduce these cost. Private Cloud is like mostly personnel data services which supplies hosted services to a limited number of people. When a service provider uses public cloud resources to create their private cloud, the result is called a virtual private cloud. Using of cloud computing for Private or public, is to provide their services to the user easy, scalable access to computing resources and IT services.

Services are divided into three categories: Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS) and Software-as-a-Service (SaaS). The name cloud computing was inspired by the cloud symbol that's often used to represent the Internet in flowchart s and diagrams.
 

Infrastructure-as-a-Service like Amazon Web Services provides virtual server instance API ) to start, stop, access and configure their virtual servers and storage. In the enterprise, cloud computing allows a company to pay for only as much capacity as is needed, and bring more online as soon as required. Because this pay-for-what-you-use model resembles the way electricity, fuel and water are consumed, it's sometimes referred to as utility computing.

Platform-as-a-service in the cloud is defined as a set of software and product development tools hosted on the provider's infrastructure. Developers create applications on the provider's platform over the Internet. PaaS providers may use APIs, website portals or gateway ware installed on the customer's computer. Force.com, (an outgrowth of Salesforce.com) and GoogleApps are examples of PaaS. Developers need to know that currently, there are not standards for interoperability or data portability in the cloud. Some providers will not allow software created by their customers to be moved off the provider's platform.

In the software-as-a-service cloud model, the vendor supplies the hardware infrastructure, the software product and interacts with the user through a front-end portal. SaaS is a very broad market. Services can be anything from Web-based email to inventory control and database processing. Because the service provider hosts both the application and the data, the end user is free to use the service from anywhere.(Margaret Rouse 2010)

Summery

Cloud computing can use from anywhere it is cheaper and more flexible because it is run by internet which needs computer even user can get access through mobile

               In the present era Gmail, hotmail, facebook, youtube are in the cloud. Business are renting the cloud services so they don’t worry about the  upgrade the software every time when change their version. A cloud provider can quickly add extra capacity or scale it back again when user need it. Business reducing the cost on It more than 50% after they get the services on cloud computing , somehow hardware and internet costs are dropping, sure, but supporting end users is still a significant cost. Moving to the cloud removes the cost of maintaining your own systems, but you still need to configure the generic cloud-based service to match your business’ unique needs, train your staff and help them find lost spreadsheets.

Reference

Stilgherrian. ( July 2010). What is cloud computing? Australian Financial Review .

Margaret Rouse. 2010. cloud computing. http://searchcloudcomputing.techtarget.com. [Accessed December 2010].