The cloud computing categories as follows [7].
• Software as a service (SaaS) applications are intended for end-users, delivered over the network.
• Platform as a service (PaaS) is the set of tools and services developed to perform coding and organizing the applications.
• Infrastructure as a service (IaaS) is the softwareandhardware that commands all servers, storage, networks and operating systems.
The different types of services described in the Figure 1.2, description of each service in the cloud computing described in next section.
a. Software as a Service
In this model, an entire application is obtainable to the client, as a service on demand. One instance of the service runs on the cloud & multiple finish users’ square measure serviceable. …show more content…
The client has the liberty to create his own applications that run on the provider’s infrastructure. to satisfy tractability and measurability needs of the applications, PaaS suppliers provide a predefined combination of OS and application servers, like LAMP platform (Linux, Apache, MySql and PHP), restricted J2EE, Ruby etc. Google’s App Engine, Force.com, etcar a number of the popular PaaS examples. PaaS has the similar feature as SaaS which supplies platform to run the applications, however within the computer code development space PaaS used as a computing platform. It grants the event of internet applications quick and simply with none complexness of buying and maintaining the computer code and infrastructure for its organization.
Characteristics of PaaS are as follows [7]
• PaaS provides services to develop, test, deploy, host and keep it in the similar unified evolution environment. It accomplished the application development process.
• Network base user interface, helps to create, modify, test and deploy different UI