This document discusses cloud computing, including: 1. It defines cloud computing as internet-based computing where virtual servers provide resources like software, infrastructure, platforms and devices to customers on a pay-as-you-use basis. 2. It describes the main types of clouds: SaaS, PaaS, and IaaS which provide software, platforms, and infrastructure as services respectively. 3. It outlines some key advantages like pay-as-you-use, location independence, instant scalability, and abstraction which allows enterprises to focus on their core business.

1. Cloud Computing
Bharat Bodage
ING Softwares,Pune

2. Contents
What is Cloud Computing ?
Features of Cloud Computing
Types of Clouds
Deployment Models
Key Technology : Virtualization
Advantages of Cloud Computing
Cloud Computing Market Size
Examples of Cloud Computing
Difficulties for Cloud Computing
References

3. What is Cloud Computing ?
The term “Cloud” is analogical to
“Internet”
“ Cloud Computing is internet
based computing where virtual
shared servers provide Software,
Infrastructure, Platform, Devices
and other resources and hosting to
customers on a pay-as-you-use
basis. ”

5. Features of Cloud Computing
Easy to Use
Virtualized
Application Programming Interface (API)
Multi-Tenancy
Pay-as-per-use
Scalability
Maintenance
Security

6. Architecture of Cloud Computing
Front End
It comprises to client’s device (or computer network)
and some applications needed for accessing cloud
computing system.
Back End
It refers to cloud itself. It includes various computer
machines, data storage system and servers.
Middleware is used to allow computers that are connected on
network to communicate each other. Middleware
administered all the information about client’s demand and
traffic ensuring smooth functioning of system.

7. Types of Clouds
SaaS
Software as a Service
PaaS
Platform as a Service
IaaS
Infrastructure as a Service

8. SaaS
Software as a Service
Software functionality is offered within cloud
Increasingly popular with SMEs/SMBs
(Small and Mid size Businesses)
Quite Expensive
Service delivered through browser
No Hardware or Software to manage
Ex: SalesForce CRM, Google Apps, Wipro w-SaaS

9. PaaS
Platform as a Service
Provides Platform where applications and
services can be developed and
hosted
Service delivered through browser
Provides API (Application Programming Interface)
Platform management is critical task
Ex: Google App Engine, Window Azure (platform)

10. IaaS
Infrastructure as a Service
Provides Resources as services
Virtualized Environment
Foundation for SaaS and PaaS
Whole cloud information viz. servers, routers,
hardware based load balancing, firewalls and
other network equipment's are provides IaaS
Ex: Amazon EC2, SQL Azure, FlexiScale

11. Deployment Models
Public Cloud:
It is traditional cloud computing where resources are dynamically
provisioned on a fine grained, self service basis over internet of from off-
site third party provider.
Community Cloud:
If several organizations have similar requirement and seek to share
infrastructure to realize the benefits of cloud computing then community
cloud can be established. This is having higher cost than public cloud
because this is having only fewer users as compared to public cloud.
However this option may offer higher level of privacy, security or policy
compliance.

12. Deployment Models Contd…
Hybrid Cloud:
It means two separate clouds joined together (public, private,
internal, community) or combination of virtualized cloud server instances
used together with real physical hardware. Hybrid cloud is use of physical
hardware and virtualized cloud server instances together to provide a single
common device.
Private Cloud:
Private cloud describe offering’s that deploy cloud computing on
private networks. It consists of applications or virtual machines in company’s
own set of hosts. Hence to recover from failure, ability to scale up or down
depending upon demand.

13. Key Technology: Virtualization
App App App
App App App OS OS OS
Operating System Hypervisor/ VM Impl.
Hardware Hardware
Traditional Stack Virtualized Stack
Virtual machine is to abstract the hardware of single computer
into several different executing environment by creating illusion
that each separate execution environment is running on its own
private machine.

14. Advantages of Cloud Computing
Pay-as-per-Use
Location Independence
Increased Flexibility
Abstraction (Allows enterprise to focus on its core)
Resource Sharing
Instant scalability

15. Cloud Computing Market Size
According to study conducted by Forbes, the global market for
enterprise cloud based services will grow from $ 12.1 billion in 2010
to $ 35.6 billion in 2015. The year-on-year growth rate will be 43% in
2011, but it will decrease to 13% over next five years. Software as a
Service(SaaS) will account for 70% of revenue in 2010, while 30%
will be related to Infrastructure as a Service(IaaS).
Another report states worldwide revenue from public IT cloud
services exceeded $ 16 billion in 2009 and is forecasted to reach $
55.5 billion in 2014, representing a compound annual growth
rate(CAGR) of 27.4 %.

16. Examples of Cloud Computing
The NY Times
Amazon EC2 (Elastic Compute Cloud)
Nasdaq
Amazon EC2 Taylor Woodrow
Google Apps
ESPN
Right Scale using Amazon EC2
CSS Major League Baseball
Amazon EC2
Joyent
British Telecom
3 Tera

17. Difficulties for Cloud Computing
Continuous high availability
Consistency
Performance Issues
Legal and political problem of data store and
translation across region
Scalability of all components
Security

18. Overview
Overview

19. References
www.tecno-pulse.com
www.luitinfotech.com
The Future of Cloud Computing
-Lutz Schubert
A Short Introduction to Cloud Computing
-David Chappell

20. Thank You !!!