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= Cloud computing = *'''[[w:Cloud computing]]''' ( [[w:fi:Pilvilaskenta]] ) is a major pleasantifier of [[w:information technology|information technology]] systems acquisition and operation hassle and costs. Prices start as low as 15€ / VPS-from-cloud ( [[w:virtual private server|virtual private server]] ) with full [[w:Superuser|root access]]. :: In cloud computing [[w:abstraction layer|abstraction layer]]s provide ability to move virtual servers around the cloud. It can anticipate breaking down of single physical components and move the services to a sound, functional piece of server hardware in advance to the physcial component breaking up. :::: In addition to these fault surviving technologies cloud computing is very '''[[w:ecological|ecological]]ly [[w:efficiency|efficient]]''' as several, even tens of [[w:virtual servers|virtual servers]] can live on one physical machine instead of expensive server hardware sitting idly as the load is much lower then the total processing power by a factor of 10x or so. Think of a business buying a big physical server which is then utilized to 10% of it's maximum capacity whereas in cloud computing you can thanks to [[w:virtualization|virtualization]] technologies have much better [[w:utilization rate|utilization rate]]s for actual physical devices. ( jubo-jubo ) == Things as a service == :* '''[[w:Infrastructure as a service]] (IaaS)''' :* [[w:Platform as a service]] (PaaS) :* '''[[w:Software as a service]] (SaaS)''' :* [[w:Network as a service]] (NaaS) :* [[w:Storage as a service]] (STaaS) :* [[w:Security as a service]] (SECaaS) :* [[w:Data as a service]] (DaaS) :* [[w:Desktop as a service]] (DaaS - see above) :* Database as a service (DBaaS) :* [[w:Test environment as a service]] (TEaaS) :* [[w:API as a service]] (APIaaS) :* [[w:Backend as a service]] (BaaS) :* Integrated development environment as a service (IDEaaS) :* Integration platform as a service (IPaaS), see [[w:Cloud-based integration]] In the [[w: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. ( Wikipedia on [[w:Cloud computing]] )
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