Difference between revisions 490915118 and 491700829 on enwiki

{{merge-to|Cloud computing|discuss=Talk:Cloud computing#Introduction to Cloud computing|date=March 2012}}
{{Introductory article|Cloud computing}}
[[File:Cloud computing.svg|400px|thumb]]
The two words in the phrase ''cloud computing'' have the following interpretations:

* '''Cloud''': As a noun, this is a metaphor for the [[Internet]],<ref name=Metaphor>{{cite web|url=
(contracted; show full)

For the usual security reasons that apply when managing a datacentre, such as to mitigate against the risk of an infrastructure [[Downtime |outage]], the host will regularly [[Backup |backup]] all data, across all tenants, but consumers can also backup their own data in their own disk space.

SaaS may be accessible from a variety of cloud clients.


'''Desktop as a Service'''⏎
⏎
'''Desktop as a Service''' (DaaS) is the hosting of a desktop PC software environment, including [[Office_suite |office-productivity applications]], such as [[Word_processing |word processing]], by a SaaS provider.<ref name=OracleSapErp>{{cite web|url= http://www.oracle.com/us/solutions/sap/database/sap-erp-cloud-352626.pdf|title= SAP ERP in the Cloud |author= |date=April 2010|publisher=Oracle ||accessdate=28 February 2012}}</ref> This is done so that only a [[ Thin client |thin client]], with perhaps just a web browser, need be used to access all the required software, and this can be financially advantageous for the consumer. Also, it simplifies deployment and administration of the PC environment.

DaaS is also known as a ''cloud desktop'' or ''desktop in the cloud''.<ref name=CloudDesktop>{{cite web|url= http://virtualdesktoponline.com/cloud-desktop/|title=Cloud Desktop |publisher=Virtual Desktop Online |date= |accessdate=28 February 2012}}</ref>

'''Database as a Service'''⏎
⏎
'''Database as a Service''' (DbaaS) is the hosting of [[Database |database]] software by a SaaS provider.<ref name=DbAAS>{{cite web|url=  http://dbaas.wordpress.com/2008/05/14/what-exactly-is-database-as-a-service/|title= What exacly is Database as a Service? |publisher= WordPress.com |date= 14 May 2008 |accessdate=28 February 2012}}</ref>

These are known as [[ Cloud database |cloud databases]].

'''Identity as a Service'''⏎
⏎
'''Identity as a Service''' (IDaaS) is the hosting of [[ Identity management system |identity-management software]] by a SaaS provider.<ref name=IDAAS>{{cite web|url= http://cloudbestpractices.net/2011/11/15/idaas-identity-as-a-shared-service/|title= IDaaS – Identity as a (Shared) Service |author= McEvoy, Neil|publisher= CloudBestPractices.net |date= 15 November 2011|accessdate=28 February 2012}}</ref>

===Platform as a Service===

(contracted; show full)*[[Platform as a service|Platform as a Service]]
*[[Software as a service|Software as a Service]]

=References=
{{Reflist|30em}}

{{DEFAULTSORT:Cloud computing}}
[[Category:Cloud computing]]