The common cloud computing service models include
Infrastructure as a service ( IAAS)- Infrastructure as a service is a cloud computing model that provides computing, storage and networking resources on pay as you go model. Migrating to IAAS helps reduce maintenance costs of on-premise data centers, help in scaling IT resources with demand, enables quick provisioning of new applications, reduce costs involved in hardware purchase and make your IT infrastructure more reliable. IAAS helps you scale dynamically, reduces downtime, allows you to shift from CAPEX to OPEX model and improves the overall security. It allows self-service provisioning, and a level playing field for SMBs to compete with big firms.
Platform as a service (PAAS)- Platform as a service is a cloud computing model that offers the complete cloud platform-middleware, hardware and software tools, servers, networks, OS software, storage, database management systems and other resources to create complete application development and deployment environment in the cloud. PAAS provides the environment to the development teams for creating, hosting, testing, deploying, running, updating and scaling applications on cloud. This helps developers to focus on application development without getting ridden with cost, inflexibility and complexity that comes with building and maintaining the on-premise platform. PAAS accelerates your time to market, allows your more freedom to experiment and innovate with lesser risk. It reduces the application management cost by handling updates, security patches and other admin tasks.
Software as a service ( SAAS)- It is a cloud computing model that offers users access to vendors’ cloud software on a subscription basis. Here the services are hosted by the cloud service provider. It enables end users to connect and use cloud-based apps over the internet. The infrastructure, middleware, app data and software are present in the service provider’s data centre. SAAS allows users to gain access and use high end enterprise applications and run it from their web browser without installation or downloading. It provides access to applications from anytime and anywhere. No loss of data is there if the user’s computer breaks down.
Functions as a service ( FAAS)- FAAS is a cloud computing model that allows you to develop and manage functionalities of applications. It places a function on cloud instance or help you execute codes for events. Functions as a service is a subset of serverless and also backend as a service. Herein you take care of functions that makes up the application.