BySreehari S

PGT(Computer Science)KV Khammam

contents

DefenitionWays in which cloud computing is acheivedSaaSPaaSIaaSTypes of infrastructure Allocationcharacteristics

Objectives

To make you understanda)What is cloud computing?b)What is SaaS,PaaS & IAAS?c)What is private, public and Hybrid cloud?d)What are the characteristics of Cloud

computing?

What is Cloud Computing?

Accessing of applications computing power and Storage over internet.

How cloud computing is acheived?

By Providing three layers as service Applications Platform Infrastructure

Software as a ServiceOff the Shelf applications are accessed over

internet.We can use the applications without installing it

on the local machine.

Examples http://sheet.zoho.com -word/spreadsheet

processor http://pixlr.com-online Image editor

Platform as a Service Provides environment and tools for creating

online applications. Our own created applications can be

uploaded on the cloud. We are not concerned about the underlying

architecture the application is running.Example:google's App Engine

Infrastructure as a Service Allows existing applications to be run on cloud

supplier's hardware.We can host our own applications with our own

system architecture and requirements.Hardware is provided by Infrastructure Service

providerExampleAmazon web servicesRackspace

The Ways in which infrastructure is allocated

Private cloud Public Cloud Hybrid Cloud

Private Cloud The cloud infrastructure is operated solely

for an organization. It may be managed by the organization or a third party and may exist on premise or off premise.

Public cloud

The cloud infrastructure is made available to the general public or a large industry group and is owned by an organization selling cloud services.

Hybrid cloud The cloud infrastructure is a composition of

two or more types of clouds ExampleComputing capability in private cloud and

storage in public cloud.

Characteristics of Cloud Computing

With cloud computing, organizations can have on-demand self-service for computing capabilities, such as server time and network storage when needed, and through a single provider.

computing resources are pooled to serve multiple consumer

Services are available through broad network access.

Cloud capabilities can be provided to the subscriber rapidly and elastically, allowing the subscriber to either increase or decrease services.

DISCUSSION

“I am storing some data on Google Drive”Is it SaaS,IaaS or PaaS?

Thank you