Cloud Computing: Storing and Accessing Data

INTRODUCTION AND BACKGROUND

CLOUD COMPUTING deals with storing and accessing data and programs over the Internet without using any of the computer’s hard disk. Cloud computing don’t deal with your hard drive.

Cloud Computing has existed for many years. This was an evolution, which started in 1950’s with mainframe computing. In this multiple users were only capable of accessing a central computer through dumb terminals, whose only function was to provide access to mainframe. As a matter of cost efficiency it was not practical for an organization to buy and maintain one for every employee. So, providing shared access to a single resource was the solution that made economic sense for this sophisticated piece of technology.

Later, in 1970 came in the concept of virtual machines. Using virtualization software VMware, it came possible to execute more than one operating system simultaneously in isolated environment. This Virtual Machine operating system took the 1950’s shared access to the next level, permitting multiple distinct computing environments to reside on one physical environment.

In 1990’s came in the telecommunication which started offering virtualized private network connections. They offered only single dedicated point-to-point data connections. In this telecommunication companies were not able to provide users with shared access to the same physical infrastructure.

Below list explains the evolution of cloud computing:

1. Grid computing: using parallel computing we solve large problems.

2. Utility computing: computer services are offered as a metered service.

3. SaaS: Network based subscriptions to applications.

4. Cloud computing: access to IT resources delivered dynamically at anytime and anywhere as a service.

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...ser data are concerned about the data possibly harmed by the viruses and malware. There area companies, which take measures providing customizable spam filtering, email encryption among security measures.

2. In Cloud computing privacy is one of the main factors, which might lead unauthorised users to access information in the cloud. To prevent this companies offer with password protection and data encryption technology.

3. Users are controlled by the cloud computing. Which includes paying to the service, where and how do you use the service and other factors. Users are totally dependent on company’s updates and backups. If the servers cease to operate then users have chances to losing all information stored.

4. Internet is not available everywhere around the word yet. If the area your in don’t support Internet there is no use of saving and downloading from cloud.