What is Platform as a service in cloud computing?
Paas in cloud computing is providing the platform as a service for the user or client which we can of development tools, in which we develop our application and deploy by using the platform as service in cloud computing. In cloud computing services, platform as a service (Paas) have less control or administration power or access as compared to the Infrastructure as a platform(Iaas) but have more control or administration power than software as a service(Saas).
In the cloud computing services, PaaS offer development and deployment platform for developing or executing applications or we can say that it provides a run time environment for the developer’s platform as a service (Paas) is basically made or have more use for application or software developer so that the developer can use it as a developing tool online. Platform as a service work as the middleware on top of which applications are made of. The main functionality of the middleware is application management.
PaaS architecture in cloud computing:–
PaaS implementations automate the process of deploying applications to the infrastructure, provisioning and configuring supporting technologies, configuring applications components, and managing system change on the basis of policies defined by the user.
They do not expose any service for managing the underlying infrastructure and offer applications with a runtime environment. Developer’s system is designed by them in terms of applications and is not related to operating systems, hardware. and other low-level services.
According to the commitments, done with the users, the core middleware is responsible for managing the resources and scaling applications automatically or on request. The core middleware exposes interfaces that permit programming and deploying applications on the cloud from a user perspective. These can be in the form of programming APIs and libraries or in the form of a Web-based interface.
The interface exposed to the user is determined by the certain development model decided for applications. Certain implementations offer a fully Web-based interface hosted in the cloud offering various services. It is possible to discover integrated developed environments on the basis of 4GL and visual programming concepts or rapid prototyping environments in which applications are made by assembling mash-ups and user-defined components, and successively customized.
Other implementations of the PaaS model offer a programming language based approach and offer a complete object model for representing an application. This approach gives more opportunities and flexibility, however, it generates longer development cycles. Generally, developers have the full power of programming languages with some limitations to offer better scalability and security.
In this situation, the conventional development environments are used to design and develop applications, which are then deployed on the cloud by employing the APIs exposed by the PaaS provider. For better utilizing the services given by the PaaS environment, specific components can be provided together with the development libraries.
Benefits of PaaS:–
(i) Runtime Environment
In PaaS services, this is the most intuitive characteristic and represents the software stack in the PaaS model. The end-user code is executed by the runtime framework on the basis of the policies defined by the user and the provider.
(ii) Automatically deployment —
PaaS environment automates the process of deploying applications to the infrastructure and scaling them when required by provisioning extra resources. This process is carried out automatically and according to the SLA created between the customers and the provider. This characteristic offers ways to provide more resources.
(iii)High level of Abstraction —
The higher level of abstraction differentiates the PaaS solutions. In PaaS, the concentration is on the applications the cloud must assist. It means PaaS solutions pros ids an approach to deploy and manage applications on the cloud instead of a bunch of virtual machines.
(iv) Services in this platform—
To simplify the development or creation environment and delivery of elastic and highly available cloud applications to developers, PaaS offerings provide them with APIs and services. Among competing PaaS solutions, these services are the main differentiators and generally entail certain components for developing applications, management, reporting, and advanced services for application monitoring.
The ability to integrate third-party cloud services provided by other vendors by using service-oriented architecture is another important component for a PaaS based approach. This opportunity makes the applications development able to evolve as required by the customers and users, and able to move quickly and easily.