Cloud ComputingCloud Computing

Agrata shukla

Introduction

Cloud is an infrastructure provided by the service provider to build internet application.

Cloud computing gets its name as a metaphor for the internet.

Cloud computing is a construct that allows you to access applications that actually reside at a location other than your computer .

Goals of cloud computing

Design guidelines for native cloud applications for industrial domains.

Embedded systems integrated with cloud services.

Support for re-engineering existing on-premise applications for the cloud computing paradigm.

Cloud Computing Architecture

Cloud Computing Reference (CCRA) defines the fundamental architectural elements constituting a cloud computing environment .

The CCRA is structured in a modular fashion in a sense that on its highest level of abstraction.

Cloud Reference Architecture diagram provides a more fine-grain view of the high-level architecture elements of the overall CCRA.

Elements of CCRA

Roles

The cloud computing Reference Architecture defines three main roles :

Cloud Service Consumer

Cloud Service Provider

Cloud Service Creator.

Cloud Service Consumer

A cloud service consumer is an organization , a human being or an IT system that consumes service instances delivered by a particular cloud service .

A service consumer can also be viewed as a kind of super-role representing the party consuming services.

Cloud Services Provider

The cloud services provider has the responsibility of providing cloud services to cloud services consumers.

A cloud service provider is defined by the ownership of a common cloud management platform (CCMP)

Cloud Service Creator

The Cloud Service Creator is responsible for creating a cloud service, which can be run by cloud service provider and by that exposed to cloud service consumers.

Service models

Cloud computing providers offer their services according to three fundamental models:

Infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS)

Infrastructure as a service

In this most basic cloud service model, providers offer computers, as physical or more often as virtual machines, and other resources. The virtual machines are run as guests by a hypervisor, such as Xen or KVM.

Platform as a service

In the PaaS model, cloud providers deliver a computing platform typically including operating system, programming language execution environment, database, and web server. Application developers can develop and run their software solutions on a cloud platform without the cost and complexity of buying and managing the underlying hardware and software layers

Software as a service

In this model, cloud providers install and operate application software in the cloud and cloud users access the software from cloud clients. The cloud users do not manage the cloud infrastructure and platform on which the application is running.

Conclusion

It is beneficial and economical to use cloud computing