1. INTRODUCTION
2. HISTORY
3. WORKING OF CLOUD COMPUTING
4. CLOUD ARCHITECTURE
5. COMPONENTS
6. TYPES OF CLOUD COMPUTING
7. ROLES PLAYED IN CLOUD COMPUTING
8. APPLICATIONS
6. CLOUD SERVICES
7. CHARACTERSTICS
8. ADVANTAGES AND DRAWBACKS
INTRODUCTION
Cloud computing is Internet ("cloud") based on development and use of computer technology ("computing").It is a style of computing in which dynamically scalable and often virtualised resources are provided as a service over the internet.Users need not have knowledge of, expertise in, or control over the technology infrastructure "in the cloud" that supports them.
The concept incorporates infrastructure as a service (IaaS), platform as a service (PaaS) and software as a service (SaaS) as well as Web 2.0 and other recent (ca. 2007-2009) technology trends which have the common theme of reliance on the Internet for satisfying the computing needs of the users. Examples of SaaS vendors include Salesforce.com and Google Apps which provide common business applications online that are accessed from a web browser, while the software and data are stored on the servers.A cloud is a pool of virtualized computer resources. A cloud can:
1.Host a variety of different workloads, including batch-style back-end jobs and interactive, user- facing applications.
2.Allow workloads to be deployed and scaled-out quickly through the rapid provisioning of virtual machines or physical machines.
3.Support redundant, self-recovering,highly scalable programming models that allow workloads to recover from many unavoidable hardware/software failures.
4.Monitor resource use in real time to enable rebalancing of allocations when needed.
Fig 1.1: Overview of cloud computing
HISTORY
The underlying concept dates back to 1960 when John McCarthy opined that "computation may someday be organized as a public utility"; indeed it shares
References: 1. http://en.wikipedia.org/wiki/Cloud_computing 2. http://communication.howstuffworks.com/cloud-computing1.htm 3. http://communication.howstuffworks.com/cloud-computing2.htm 4. http://en.wikipedia.org/wiki/Cloud_computing_user 5. http://communication.howstuffworks.com/cloud-computing.htm 6. http://communication.howstuffworks.com/cloud-computing.htm/printable 7. http://cloudcadet.com/what-is-cloud-computing/ 8. http://askville.amazon.com/advantages-disadvantages-Web-based-Cloud-Computing- Wave/AnswerViewer.do?requestId=16202235