Cloud Services models are the services that have come in demand recently in affiliation with multinational organizations such as Microsoft, Google, Amazon, Oracle, etc. The aim of these service models is to drive the path for innovation development. With their help, the user becomes independent of public servers. The organizations aim towards contracting out the storage to reputable providers and they ignore the restriction regarding guaranteed security as well as supporting the foundation.
The service models in the cloud are three which are IaaS, PaaS, and SaaS. Every service model in cloud computing has different levels of control, flexibility, as well as management scheme to select the proper set of services for the need of the user. Below are the three cloud service models:
Infrastructure as a Service (IaaS)
IaaS is the most flexible model in cloud services. It lets the user rent the hardware which contains all the basic building blocks related to the cloud and IT services. It provides complete control over the hardware which runs the user’s application. Examples are VMs, servers, networks, storage, and operating systems. It’s an instant computing infrastructure, provisioned and managed over the internet and its services are highly scalable and dynamic. For example, VM, EC2, Azure, etc
Platform as a Service (PaaS)
This cloud service is created for the programmer to develop, test, run, and manage the applications. It gives the user a ready-to-use environment for development. The developers can specialize in writing as well as executing high-quality code to make customized applications. This cloud service model makes the method of developing and deploying applications simpler. It is though more expensive than IaaS but less expensive than SaaS. For example, oracle, google cloud, etc.
Software as a Service (SaaS)
This service is also called an ‘on-demand’ service as the applications on the web are hosted by a central location. This service model is accessible over the internet. The provides the user with a complete product that is run and managed by the service provider. The software is hosted online and made available to customers on a subscription basis or for purchase in this cloud service model. For Example, Microsoft office 365, Dropbox, Gmail, etc.
Comparisons between IaaS, PaaS, and SaaS
|Stores the information and creates platforms for app development.||Comprises virtual platforms and tools for creating, testing, and deploying apps.||Focuses on the app for business tasks using web development.|
|Provides access to resources like virtual machines, virtual storage, etc.||Provides access to runtime environments and deployment tools.||Provides access to the software as a service to customers.|
|Used by network architects.||Used by developers.||Used by end-users.|
|Only gives access to infrastructure.||Gives access to both infrastructure and platform.||Gives access to infrastructure, software and platform.|