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Cloud computing
Advantages

Cloud computing relies on sharing of resources to achieve coherence and economies of scale similar to a utility (like the electricity grid) over a network.[2] At the foundation of cloud computing is the broader concept of converged infrastructure and shared services.

The cloud also focuses on maximizing the effectiveness of the shared resources. Cloud resources are usually not only shared by multiple users but are also dynamically re-allocated per demand. This can work for allocating resources to users. For example, a cloud computer facility, which serves European users during European business hours with a specific application (e.g. email) while the same resources are getting reallocated and serve North American users during North America 's business hours with another application (e.g. web server). This approach should maximize the use of computing powers thus reducing environmental damage as well since less power, air conditioning, rackspace, etc. is required for a variety of functions.

The term "moving to cloud" also refers to an organization moving away from a traditional CAPEX model (buy the dedicated hardware and depreciate it over a period of time) to the OPEX model (use a shared cloud infrastructure and pay as you use it).

Proponents claim that cloud computing allows companies to avoid upfront infrastructure costs, and focus on projects that differentiate their businesses instead of infrastructure.[3] Proponents also claim that cloud computing allows enterprises to get their applications up and running faster, with improved manageability and less maintenance, and enables IT to more rapidly adjust resources to meet fluctuating and unpredictable business demand.[3][4][5]
Hosted services

In marketing, cloud computing is mostly used to sell hosted services in the sense of application service provisioning that run client server software at a remote location. Such services are given popular acronyms like 'SaaS ' (Software as a



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ISBN 978-1-4673-2892-0. Jump up ^ He, Sijin; L. Guo, Y. Guo (2011). "Real Time Elastic Cloud Management for Limited Resources". Proceedings of 2011 IEEE 4th International Conference on Cloud Computing (Cloud2011): 622–629. doi:10.1109/CLOUD.2011.47. ISBN 978-0-7695-4460-1. Jump up ^ Mills, Elinor (2009-01-27). "Cloud computing security forecast: Clear skies". CNET News. Retrieved 2010-08-22. Jump up ^ David Perera (2012-07-12). "The real obstacle to federal cloud computing". FierceGovernmentIT. Retrieved 2012-12-15. Jump up ^ "Top 10 Reasons why Startups should Consider Cloud". Cloudstory.in. 2012-09-05. Retrieved 2012-12-15. Jump up ^ "BMC Service Catalog Enforces Workload Location". eweek.com. 2011-08-02. Retrieved 2013-03-10. Jump up ^ "HP 's Turn-Key Private Cloud - Application Development Trends". Adtmag.com. 2010-08-30. Retrieved 2012-12-15. ^ Jump up to: a b c Babcock, Charles (2011-06-03). "RightScale Launches App Store For Infrastructure - Cloud-computing". 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(2011-04-27) “How to integrate with the cloud”, InfoWorld: Cloud Computing, April 27, 2011. [4] ^ Jump up to: a b c Semple, Bryan ^ Jump up to: a b Golden, Barnard. (2010-11-05) “Cloud Computing: Why You Can 't Ignore Chargeback,” CIO.com. [6] ^ Jump up to: a b c d Sullivan, Dan ^ Jump up to: a b Rigsby, Josette. (2011-08-30) “IBM Offers New Hybrid Cloud Solution Using Cast Iron, Tivoli,” CMS Wire. [8] Jump up ^ "Is a Private Cloud Really More Secure?" Jump up ^ Haff, Gordon (2009-01-27). "Just don 't call them private clouds". CNET News. Retrieved 2010-08-22. Jump up ^ "There 's No Such Thing As A Private Cloud". InformationWeek. 2010-06-30. Retrieved 2010-08-22. Jump up ^ Metzler, Jim; Taylor, Steve. (2010-08-23) "Cloud computing: Reality vs. fiction," Network World. [9] Jump up ^ Rouse, Margaret Jump up ^ Vizard, Michael. "How Cloudbursting 'Rightsizes ' the Data Center", (2012-06-21). Slashdot. [11] Jump up ^ Stevens, Alan (June 29, 2011) Jump up ^ Gens, Frank. (2008-09-23) “Defining ‘Cloud Services’ and ‘Cloud Computing’,” IDC Exchange. [12] ^ Jump up to: a b c Henderson, Tom and Allen, Brendan Jump up ^ Whitehead, Richard. (2010-04-19) “A Guide to Managing Private Clouds,” Industry Perspectives. [14] Jump up ^ “Definition: Cloud management”, ITBusinessEdge/Webopedia Jump up ^ "Intercloud is a global cloud of clouds". Samj.net. 2009-06-22. Retrieved 2010-08-22. Jump up ^ Canada (2007-11-29). "Head iaaan the clouds? Welcome to the future". Toronto: Theglobeandmail.com. Retrieved 2010-08-22. Jump up ^ Cloud Computing Grows Up: Benefits Exceed Expectations According to Report. Press Release, May 21, 2013. [15] Jump up ^ Cauley, Leslie (2006-05-11)

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