What is Cloud?

Cloud is the frozen crystals found suspended above the surface of planetary body. Apart from the scientific explanation - everything is quite interesting about clouds. The picture of cloud is what we associate with dreams, thoughts and what not. We subconsciously associate cloud with all encompassing vastness. To the computer people, cloud is always the de facto picture to represent a vast network of machines in technical diagrams.

What is Cloud Computing?

Cloud Computing is all about dynamically provisioning resources on demand to meet computing demands.

Let us give a real world example to understand cloud computing in the correct way. Assume you are running short of office space at headquarters and obvious solution would be to pile up more floors. Skyscrapers cannot be made to extend after some point. If you were allowed to dream, you would obviously wish to expand horizontally with demand and shrink when needs reduce. Cloud Computing works exactly like this to meet your growing computing needs.

Why Cloud Computing?

  • The Cloud enabled business doesn't need to worry about shortage of resources
  • No huge upfront investment
  • Pay as you go model
  • Cloud takes care of application scalability

What are the interesting concepts behind Cloud?

  • PaaS(Platform as a Service)
  • Auto Scaling
  • IaaS(Infrastructure as a Service)
  • SaaS

What is PaaS?

A fresh approach to Cloud Computing. A total platform for software development, software life cycle management and software deployment/publishing is provided as a service.

  • Efficient way to build scalable application
  • Easy way to deploy application in scalable environment
  • No hardware expenditure incurred
  • Easy to manage application life cycle management
  • On demand billing

What is IaaS?

Facilitates availability of computer resources as a service. A data center can outsource their infrastructure to be used as service. This service can be availed for needs without investing heavily on hardware.

What is Auto Scaling?

Provides scalability to web applications running in IaaS. It's like adding intelligence to IaaS to provide high availability and high scalability for web applications. Your existing web application need not be modified to become highly scalable.

What is SaaS?

Software is deployed to be used on demand, in a service oriented manner.


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