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And finally, Oracle is on Cloud - 23 hours agoMUMBAI, INDIA: It would be incorrect to say that Oracle attracted a lot of ... Larry Ellison, Oracle's CEO was reported as describing 'cloud computing' as ...CIOL - 62 related articles »
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From Wikipedia, the free encyclopedia
Cloud computing is a way of computing, via the Internet, that broadly shares computer resources instead of using software or storage on a local computer. Cloud refers to the fact that exact pathways and exact servers need not be addressed by the user. Cloud computing is an outgrowth of the ease-of-access to remote computing sites provided by the Internet.
In concept, it is a paradigm shift whereby details are abstracted from the users who no longer have need of, expertise in, or control over the technology infrastructure "in the cloud" that supports them. Cloud computing describes a new supplement, consumption and delivery model for IT services based on the Internet, and it typically involves the provision of dynamically scalable and often virtualized resources as a service over the Internet.
The term cloud is used as a metaphor for the Internet, based on the cloud drawing used to depict the Internet in computer network diagrams as an abstraction of the underlying infrastructure it represents. Typical cloud computing providers deliver common business applications online which are accessed from a web browser, while the software and data are stored on servers.
A technical definition is "a computing capability that provides an abstraction between the computing resource and its underlying technical architecture (e.g., servers, storage, networks), enabling convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction." This definition states that clouds have five essential characteristics: on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service.
The majority of cloud computing infrastructure, as of 2009[update], consists of reliable services delivered through data centers and built on servers. Clouds often appear as single points of access for all consumers' computing needs. Commercial offerings are generally expected to meet quality of service (QoS) requirements of customers and typically offer SLAs.
- 1 Comparisons
- 2 Characteristics
- 3 Economics
- 4 Architecture
- 5 History
- 6 Key features
- 7 Layers
- 8 Deployment modes
- 9 Issues
- 10 Criticism of the term
- 11 References