Cloud computing allows users to access computing resources like data storage, servers, databases, networking, software, analytics and more without direct interaction with the underlying infrastructure. It provides services through three main models: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). IaaS provides on-demand access to virtualized computing resources. PaaS provides a platform and solutions stack. And SaaS provides software applications delivered through a browser. Common advantages of cloud computing include pay per use, instant scalability, security, reliability and APIs.

1. An Introduction to
Cloud Computing

2. What is the cloud?
• IT as a service
• Cloud allows access to services without user technical knowledge or
control of supporting infrastructure
• Best described in terms of what happened to mechanical power over
100 yrs ago
• Now computers are simple devices connected to the larger cloud
• Data processing, storage and software applications that used to run
locally are now being supplied by big central computing stations. They're
becoming, in essence, computing utilities.
What is
Cloud Computing?

3. IaaS
Infrastructure as a Service
PaaS
Platform as a Service
STaaS
Storage as a Service
SaaS
Software as a Service

4. Software delivery model
• Also known as On-demand
service.
• No hardware or software to
manage.
• Service delivered through a
browser.
SaaS

5. Advantages
• Pay per use
• Instant Scalability
• Security
• Reliability
• APIs
SaaS

6. Examples
• CRM
• Financial Planning
• Human Resources
• Yahoo mail
Commercial Services:
• Salesforce.com
• emailcloud
SaaS

7. Platform delivery model
• Category of cloud computing
service that provides a platform
and a solution stack as a
service.
• Estimating demand is not a
science!
• Platform management is not
fun!
PaaS

8. Popular services
• Storage
• Database
• Scalability
PaaS

10. Advantages
• Pay per use
• Instant Scalability
• Security
• Reliability
• APIs
PaaS

11. Examples
• Google App Engine
• Mosso
• AWS: S3
PaaS

12. Computer infrastructure
delivery model
Access to infrastructure stack:
– Full OS access
– Firewalls
– Routers
– Load balancing
IaaS

13. Advantages
• Pay per use
• Instant Scalability
• Security
• Reliability
• APIs
IaaS

14. Examples
• Flexi scale
• AWS: EC2
IaaS

15. Common Factors
• Pay per use
• Instant Scalability
• Security
• Reliability
• APIsIaaS
PaaS
SaaS

17. MODES OF CLOUDS
1. Public Cloud:
 Can be accessed by any subscriber
with an internet connection and access
to the cloud space.
 Can be shared by various
organizations.
 E.g. : Amazon, Google, etc….

18. 2. Private cloud:
 Is established for a specific group or an
organizations and limits access to just
that group.
 It is not shared with other
organizations.
 It is more expensive and more secure.
 E.g.: HP data centre, IBM, 3tera.

19. 3. Hybrid Cloud:
 It is essentially a combination or usage
of both public and private cloud.
 Organizations may host critical
applications on private clouds.
 Where as relatively less security
concerns on public cloud.

21. CLOUD OPERATING
SYSTEM
• Eye OS
• Amoeba OS
• Glide OS
• Start force
• my Goya
• Corneli OS
• Cloudo, Ghost, Zimdesk

22. Advantages:
• Is Eco-Friendly.
• Can reduce E-waste.
• Helps to accelerate Green IT.
• Can reduce Global Warming.
• Reduce cost and Increase
storage.
• Allows focus on any topic.
IaaS
PaaS
SaaS

23. DISADVANTAGE:
• Requires a constant internet connection.
• Security and Privacy.
• A dead internet connection means no
work and in areas where internet
connections are few or inherently
unreliable, this cloud be a deal-breaker.
• When you are offline, cloud computing
simply does not work.

24. CONCLUSION
• It is a powerful new abstraction for large
scale data processing system.
• Also it is a new emerging architecture
needed to expand the internet to
become the computing platform of the
future.