What is SaaS, PaaS and IaaS? With examples

Question

Please define the following terms with examples.

Also can you please tell that the popular cloud services like Apache, Hadoop, AWS EC2 belong to which category and why?

Answer 1

• SaaS: SaaS is software as a service. It uses the web to deliver applications. Most of the SaaS applications can be run directly from a web browser without any download. SaaS offers email and collaboration, customer relationship management and healthcare related applications.

Eg: Salesforce, Google Apps, Concur etc.

• PaaS: PaaS is product as a service. PaaS provides computing platforms such as operating system, database, web-server etc.

Eg: Heroku, Apache Stratosphere, Windows Azure etc.

• IaaS: IaaS is infrastructure as a service. IaaS are self-service models for accessing, monitoring and managing remote data center infrastructures.

Eg: Google compute engine, Amazon Web services.

• AWS, EC2, Microsoft Azure and S3 belong to IaaS

• Hadoop doesn't belong to any. It is a distributed computing platform.

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