From Wikipedia, the free encyclopedia
Jump to: navigation, search
Cloud computing logical diagram
Cloud computing is the use of computing resources (hardware and software) that are delivered as a service over a network (typically the Internet). The name comes from the use of acloud-shaped symbol as an abstraction for the complex infrastructure it contains in system diagrams. Cloud computing entrusts remote services with a user 's data, software and computation.
There are many types of public cloud computing:[1] * Infrastructure as a service (IaaS) * Platform as a service (PaaS) * Software as a service (SaaS) * Network as a service (NaaS) * Storage as a service (STaaS) * Security as a service (SECaaS) * Data as a service (DaaS) * Desktop as a service (DaaS - see above) * Database as a service (DBaaS) * Test environment as a service (TEaaS) * API as a service (APIaaS) * Backend as a service (BaaS) * Integrated development environment as a service (IDEaaS)
In the business model using software as a service, users are provided access to application software and databases. The cloud providers manage the infrastructure and platforms on which the applications run. SaaS is sometimes referred to as “on-demand software” and is usually priced on a pay-per-use basis. SaaS providers generally price applications using a subscription fee.
Proponents claim that the SaaS allows a business the potential to reduce IT operational costs by outsourcing hardware and software maintenance and support to the cloud provider. This enables the business to reallocate IT operations costs away from hardware/software spending and personnel expenses, towards meeting other IT goals. In addition, with applications hosted centrally, updates can be released without the need for users to install new software. One drawback of SaaS is that the users ' data are stored on the cloud provider’s server. As a result, there could be
References: 1. ^ Monaco, Ania (7 June 2012 [last update]). "A View Inside the Cloud".theinstitute.ieee.org (IEEE). http://theinstitute.ieee.org/technology-focus/technology-topic/a-view-inside-the-cloud. Retrieved August 21, 2012. 3. ^ "Oestreich, Ken, "Converged Infrastructure," CTO Forum, November 15, 2010". Thectoforum.com. 2010-11-15. http://www.thectoforum.com/content/converged-infrastructure-0. Retrieved 2011-12-02. 5. ^ Figure 8, "A network […] is shown schematically as a cloud", U.S. Patent 5,485,455, column 17, line 22, filed Jan 28, 1994 6 7. ^ Strachey, Christopher (June 1959). "Time Sharing in Large Fast Computers".Proceedings of the International Conference on Information processing, UNESCO. paper B.2.19: 336–341. 8. ^ "July, 1993 meeting report from the IP over ATM working group of the IETF".CH: Switch. http://mirror.switch.ch/ftp/doc/ietf/ipatm/atm-minutes-93jul.txt. Retrieved 2010-08-22. 10. ^ Ryan; Falvey; Merchant (October 2011), "Regulation of the Cloud in India",Journal of Internet Law 15 (4), http://ssrn.com/abstract=1941494 11 12. ^ "Cloud Computing: Clash of the clouds". The Economist. 2009-10-15.http://www.economist.com/displaystory.cfm?story_id=14637206. Retrieved 2009-11-03. 14. ^ Gruman, Galen (2008-04-07). "What cloud computing really means". InfoWorld.http://www.infoworld.com/d/cloud-computing/what-cloud-computing-really-means-031. Retrieved 2009-06-02. 19. ^ Keep an eye on cloud computing, Amy Schurr, Network World, 2008-07-08, citing the Gartner report, "Cloud Computing Confusion Leads to Opportunity". Retrieved 2009-09-11. 20. ^ Gartner Says Worldwide IT Spending On Pace to Surpass Trillion in 2008, Gartner, 2008-08-18. Retrieved 2009-09-11. 24. ^ "Sun CTO: Cloud computing is like the mainframe". Itknowledgeexchange.techtarget.com. 2009-03-11.http://itknowledgeexchange.techtarget.com/mainframe-blog/sun-cto-cloud-computing-is-like-the-mainframe/. Retrieved 2010-08-22. 26. ^ Danielson, Krissi (2008-03-26). "Distinguishing Cloud Computing from Utility Computing". Ebizq.net.http://www.ebizq.net/blogs/saasweek/2008/03/distinguishing_cloud_computing/. Retrieved 2010-08-22. 28. ^ a b c d "Defining "Cloud Services" and "Cloud Computing"". IDC. 2008-09-23.http://blogs.idc.com/ie/?p=190. Retrieved 2010-08-22. 30. ^ Farber, Dan (2008-06-25). "The new geek chic: Data centers". CNET News.http://news.cnet.com/8301-13953_3-9977049-80.html. Retrieved 2010-08-22. 31. ^ King, Rachael (2008-08-04). "Cloud Computing: Small Companies Take Flight". Businessweek.http://www.businessweek.com/technology/content/aug2008/tc2008083_619516.htm. Retrieved 2010-08-22. 35. ^ "Encrypted Storage and Key Management for the cloud". Cryptoclarity.com. 2009-07-30.http://www.cryptoclarity.com/CryptoClarityLLC/Welcome/Entries/2009/7/23_Encrypted_Storage_and_Key_Management_for_the_cloud.html. Retrieved 2010-08-22. 36. ^ Mills, Elinor (2009-01-27). "Cloud computing security forecast: Clear skies". CNET News. http://news.cnet.com/8301-1009_3-10150569-83.html. Retrieved 2010-08-22. 37. ^ David Perera (2012-07-12). "The real obstacle to federal cloud computing". FierceGovernmentIT. http://www.fiercegovernmentit.com/story/real-obstacle-federal-cloud-computing/2012-07-12. Retrieved 2012-12-15. 38. ^ "Top 10 Reasons why Startups should Consider Cloud". Cloudstory.in. 2012-09-05. http://cloudstory.in/2012/07/top-10-reasons-why-startups-should-consider-cloud/. Retrieved 2012-12-15. 39. ^ "HP 's Turn-Key Private Cloud - Application Development Trends". Adtmag.com. 2010-08-30. http://adtmag.com/blogs/watersworks/2010/08/hps-turn-key-private-cloud.aspx. Retrieved 2012-12-15. 40. ^ a b c Babcock, Charles (2011-06-03). "RightScale Launches App Store For Infrastructure - Cloud-computing". Informationweek.com.http://www.informationweek.com/news/cloud-computing/infrastructure/229900165. Retrieved 2012-12-15. 41. ^ a b "Red Hat launches hybrid cloud management software - Open Source". Techworld. 2012-06-06.http://www.techworld.com.au/article/426861/red_hat_launches_hybrid_cloud_management_software. Retrieved 2012-12-15. 42. ^ Brown, Rodney. "Spinning up the instant cloud," CloudEcosystem, April 10, 2012 [www.cloudecosystem.com/author.asp?section_id=1873&doc_id=242031] 43 44. ^ Samson, Ted (April 10, 2012). "HP advances public cloud as part of ambitious hybrid cloud strategy". InfoWorld. http://www.infoworld.com/t/hybrid-cloud/hp-advances-public-cloud-part-of-ambitious-hybrid-cloud-strategy-190524. Retrieved 2012-12-14. 45. ^ "HP Cloud Maps can ease application automation," SiliconIndia, January 24, 2012[2] 46 56. ^ Stevens, Alan (June 29, 2011). "When hybrid clouds are a mixed blessing". The Register. http://www.theregister.co.uk/2011/06/29/hybrid_cloud/. Retrieved March 28, 2012. 59. ^ Haff, Gordon (2009-01-27). "Just don 't call them private clouds". CNET News.http://news.cnet.com/8301-13556_3-10150841-61.html. Retrieved 2010-08-22. 60. ^ "There 's No Such Thing As A Private Cloud". InformationWeek. 2010-06-30.http://www.informationweek.com/cloud-computing/theres-no-such-thing-as-a-private-cloud/229207922. Retrieved 2010-08-22. 64. ^ "Intercloud is a global cloud of clouds". Samj.net. 2009-06-22.http://samj.net/2009/06/intercloud-is-global-cloud-of-clouds.html. Retrieved 2010-08-22. 67. ^ Canada (2007-11-29). "Head in the clouds? Welcome to the future". Toronto: Theglobeandmail.com.http://www.theglobeandmail.com/servlet/story/LAC.20071129.TWLINKS29/TPStory/Business. Retrieved 2010-08-22. 68. ^ Cauley, Leslie (2006-05-11). "NSA has massive database of Americans ' phone calls". USATODAY.com. http://www.usatoday.com/news/washington/2006-05-10-nsa_x.htm. Retrieved 2010-08-22. 69. ^ Winkler, Vic (2011). Securing the Cloud: Cloud Computer Security Techniques and Tactics. Waltham, Massachusetts: Elsevier. p. 60. ISBN 978-1-59749-592-9.http://www.elsevier.com/wps/find/bookdescription.cws_home/723529/description. 74. ^ "Google Apps and Government". Official Google Enterprise Blog. 2009-09-15.http://googleenterprise.blogspot.com/2009/09/google-apps-and-government.html. Retrieved 2010-08-22. 76. ^ "Amazon gets SAS 70 Type II audit stamp, but analysts not satisfied". SearchCloudComputing.com. 2009-11-17.http://searchcloudcomputing.techtarget.com/news/article/0,289142,sid201_gci1374629,00.html. Retrieved 2010-08-22. 80. ^ "FedRAMP". U.S. General Services Administration. 2012-06-13.http://www.gsa.gov/portal/category/102371. Retrieved 2012-06-17. 81. ^ Cohn, Cindy; Samuels, Julie (31 October 2012). "Megaupload and the Government 's Attack on Cloud Computing"]. Electronic Frontier Foundation.https://www.eff.org/deeplinks/2012/10/governments-attack-cloud-computing. Retrieved 2012-12-14. 82. ^ Maltais, Michelle (26 April 2012). "Who owns your stuff in the cloud?". Los Angeles Times. http://articles.latimes.com/2012/apr/26/business/la-fi-tech-savvy-cloud-services-20120426. Retrieved 2012-12-14. 83. ^ Jon Brodkin (July 28, 2008). "Open source fuels growth of cloud computing, software-as-a-service". Network World.http://www.networkworld.com/news/2008/072808-open-source-cloud-computing.html. Retrieved 2012-12-14. 84. ^ "VMware Launches Open Source PaaS Cloud Foundry". Simpler Media Group, Inc.. 2011-04-21. http://www.cmswire.com/cms/information-management/vmware-launches-open-source-paas-cloud-foundry-010941.php. Retrieved 2012-12-14. 85. ^ "AGPL: Open Source Licensing in a Networked Age". Redmonk.com. 2009-04-15. http://redmonk.com/sogrady/2009/04/15/open-source-licensing-in-a-networked-age/. Retrieved 2010-08-22. 88. ^ "OpenStack Foundation launches". Infoworld.com. 2012-09-19.http://www.infoworld.com/d/cloud-computing/openstack-foundation-launches-202694/. Retrieved 2012-17-11. 89. ^ "Did OpenStack Let VMware Into The Henhouse?". Informationweek.com. 2012-10-19. http://www.informationweek.com/development/open-source/did-openstack-let-vmware-into-the-henhou/240009337. Retrieved 2012-17-11. 90. ^ a b Zissis, Dimitrios; Lekkas (2010). "Addressing cloud computing security issues".Future Generation Computer Systems. doi:10.1016/j.future.2010.12.006.http://www.sciencedirect.com/science/article/pii/S0167739X10002554. 91. ^ Winkler, Vic (2011). Securing the Cloud: Cloud Computer Security Techniques and Tactics. Waltham, MA USA: Syngress. pp. 187, 189. ISBN 978-1-59749-592-9.http://www.elsevier.com/wps/find/bookdescription.cws_home/723529/description#description. 93. ^ "Security of virtualization, cloud computing divides IT and security pros". Network World. 2010-02-22. http://www.networkworld.com/news/2010/022210-virtualization-cloud-security-debate.html. Retrieved 2010-08-22. 94. ^ Armbrust, M; Fox, A., Griffith, R., Joseph, A., Katz, R., Konwinski, A., Lee, G., Patterson, D., Rabkin, A., Zaharia, (2010). "A view of cloud computing.".Communication of the ACM 53 (4): 50–58. doi:10.1145/1721654.1721672. 99. ^ Berl, Andreas, et al., Energy-Efficient Cloud Computing, The Computer Journal, 2010.