what is PaaS and Laas?
Answers
Infrastructure as a Service (IaaS)
Providing the fundamental building blocks of computing resources, IaaS takes the traditional physical computer hardware, such as servers, storage arrays, and networking, and lets you build virtual infrastructure that mimics these resources, but which can be created, reconfigured, resized, and removed within moments, as and when a task requires it. The most well known IaaS provider, Amazon Web Services, offers a variety of options, including their “EC2” computing platform, and “S3” storage platform.
Platform as a Service (PaaS)
Operating at the layer above raw computing hardware, whether physical or virtual, PaaS provides a method for programming languages to interact with services like databases, web servers, and file storage, without having to deal with lower level requirements like how much space a database needs, whether the data must be protected by making a copy between 3 servers, or distributing the workload across servers that can be spread throughout the world. Typically, applications must be written for a specific PaaS offering to take full advantage of the service, and most platforms only support a limited set of programming languages. Often, PaaS providers also have a Software as a Service offering (see below), and the platform has been initially built to support that specific software. Some examples of PaaS solutions are the “Google App Engine” system, “Heroku” which operates on top of the Amazon Web Services IaaS system, and “Force.com” built as part of the SalesForce.com Software as a Service offering.
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