Cloud Service Models

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Time
3 hours 51 minutes
Difficulty
Beginner
CEU/CPE
4
Video Transcription
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>> The last thing we'll talk about in this module is
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the so-called Cloud Services Models.
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The National Institute of Standards
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and Technologies outlines
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three different service models
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that are crucial for understanding the Cloud.
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Those three service models are compared to
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the traditional model for pricing
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software applications in your own data center,
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also called the on-premises model.
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If you have your own data center on-premises,
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you are responsible for buying, setting up,
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and managing the whole stack for your application.
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This includes hardware like
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networking, storage, and servers.
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You also need to configure the virtualization,
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install the operating system on the servers,
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and set up any middleware and
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runtimes that your application will need.
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Last, you need to deploy
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your application and manage the data it stores and uses.
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The first Cloud service model is
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called Infrastructure as a service.
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Infrastructure as a service is very
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similar to the on-premises model.
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However, in the case of Infrastructure as a service,
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the Cloud vendor is responsible for
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managing the hardware in the virtualization layer,
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giving you complete control on the choice of
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operating system and the rest of the stack.
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Of course, you pay some price for
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the services provided by the Cloud vendor.
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The benefit of this model is
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that you don't need to deal with setting
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up and managing the lowest level
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of components of the stack.
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More importantly, you don't need to spend tons of
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money initially to buy the hardware,
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acquire a building, and deal with utilities.
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Platform as a service or PaaS,
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is the next level of instruction.
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In this model, the vendor manages
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everything else except your application and data.
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This is very useful for
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rapid development of applications because
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development teams don't need to spend time
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managing the infrastructure and the runtime components.
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The last model is called Software as a service.
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In this case, the vendor manages
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everything and you just consume the software.
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