Cloud Computing

'''Cloud Computing''' a style of computing where IT-related capabilities are provided "as a service", allowing users to access technology-enabled services "in the cloud" without knowledge of, expertise with, or control over the technology infrastructure that supports them. The cloud is a metaphor for the Internet.

>== Relations == 

The idea of Web-based applications is old, Sun proposed &quot;the Network is the Computer&quot; many years before cloud computing became popular. The idea of computing as a commodity or utility can also be found in [[Grid Computing|grid computing]] visions. Cloud computing became ultimately possible through large companies like Amazon, Google, Sun, IBM, and Microsoft who offer a part of their huge computational capacity and extremely large scale infrastructures (including storage, servers, etc.) as a service. Only these large companies can deliver reliable services through their large data centers. Like any next big trend and buzzword it sounds nebulous, and means many things to different people, and it is based on many different previous trends.

Cloud computing combines ideas of [[Distributed Computing|distributed computing]] and [[Grid Computing|grid computing]] (&quot;a 'super and virtual computer' is composed of a cluster of networked, loosely-coupled computers, acting in concert to perform very large tasks&quot;), utility computing (the &quot;packaging of computing resources, such as computation and storage, as a metered service similar to a traditional public utility such as electricity&quot;) and [[Autonomic Computing|autonomic computing]] (&quot;computer systems capable of self-management&quot;). Indeed many cloud computing deployments are today powered by grids, have autonomic characteristics and are billed like utilities, but cloud computing can be seen as a natural next step from the grid-utility model.

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== Links ==

* Wikipedia entry for [http://en.wikipedia.org/wiki/Cloud_computing Cloud Computing]

* InfoWorld article [http://www.infoworld.com/article/08/04/07/15FE-cloud-computing-reality_1.html What cloud computing really means]

* Technology Review article [http://www.technologyreview.com/Infotech/19397/?a=f Computer in the Cloud]

* NYTimes.com article about [http://www.nytimes.com/2008/05/25/technology/25proto.html Cloud Computing]

* HPCC 2008 keynote [http://arxiv.org/abs/0808.3558 Market-Oriented Cloud Computing] - Vision, Hype, and Reality for Delivering IT Services as Computing Utilities

[[Category:X-Computing_Techniques]]