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Cloud Computing - SaaS, Paas and IaaS Models
In the previous article Introduction to Cloud Computing we explained the basics of cloud computing.
In this article we will explain the main 3 models of cloud.

There are 3 models of cloud computing which describe the service on offer; these are
  • Software as a Service (SaaS)
  • Platform as a Service (PaaS)
  • Infrastructure as a Service (IaaS)

SAP HANA Cloud Platform PaaS
Software as a Service (SaaS):

Cloud-based applications or software as a service (SaaS) - run on cloud that are owned and operated by others and that connect to users’ computers via the Internet and, usually, a web browser.
This means pretty much any program that you use on the internet.

Producers: Any online provider, Google Docs, Facebook.
Consumers: Pretty much everyone who uses the internet.

Platform as a service (PaaS):

Platform as a service provides a cloud-based environment with everything required to support the complete life cycle of building and delivering web-based (cloud) applications - without the cost and complexity of buying and managing the underlying hardware, software, provisioning and hosting.
This describes services that developers use to build custom cloud applications.

Producers:, Google App Engine
Consumers: App and web developers

Infrastructure as a Service (IaaS):

Infrastructure as a service provides companies with computing resources including servers, networking, storage, and data center space on a pay-per-use basis.
In this service, companies access either physical or virtual servers on a pay-as-you-go basis. This allows them to pay for only the server space they use. It often overlaps with PaaS, and the distinction between the two is often very difficult to make.

Producers: Amazons Elastic Compute Cloud (EC2)
Consumers: Development and IT providers

SAP HANA Cloud Platform PaaS

Database as a Service (DBaaS):

Apart from the 3 models explained above, there is one more model that is available now a days – Dbaas.
Database-as-a-Service (DBaaS) is a service that is managed by a cloud operator (public or private) that supports applications, without the application team assuming responsibility for traditional database administration functions. With a DBaaS, the application developers should not need to be database experts, nor should they have to hire a database administrator (DBA) to maintain the database.

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One thought on “Cloud Computing – SaaS, Paas and IaaS Models

  1. devops onine training says:

    Nice Article. How it help to developer in terms of balance the day to day life.

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