This document provides an overview of cloud computing. It defines cloud computing as storing information permanently on servers accessed over the internet while caching it temporarily on local devices. The document then discusses the history and evolution of cloud computing concepts. It outlines the main architectural layers (SaaS, PaaS, IaaS) and types of clouds (public, private, hybrid). Reasons for migrating to the cloud include the pay-per-use model and reduced costs, runtimes, and response times. The effectiveness and issues/concerns of cloud computing are also summarized before concluding that cloud computing is a viable solution for businesses.

1. SUBMITTED TO: MADE BY:
MISS.MANI BUTWALL POOJA CHOUHAN
AKSHRA GURAV.
SHIKHA JOSHI

2. Source: Wikipedia

3. Source: http://www.free-pictures-photos.com/

4. What is Cloud Computing?
“Cloud Computing is a paradigm in which information is
permanently stored in servers on the internet and cached temporarily
on clients that include desktops, entertainment centers, table
computers, notebooks, wall computers, hand-helds, sensors,
monitors, etc.” - 2008 IEEE Internet Computing

5. History
 Concept has existed since the 60s
 The term ‘Cloud’ originates from
telecommunications world of 1990s
 John McCarthy – proposed the idea of computation
being delivered as a public utility
 Ramnath K. Chellappa – first academic definition
 a computing paradigm where the boundaries of computing
will be determined by economic rationale rather than
technical limits

6. History
 Phases:
 Supercomputer
 Single machine with many processors plugged into it
 Cluster computing
 Collection of many smaller machines, each with a few number of
processors and independent memory
 Grid computing
 Expands techniques of clustering but computers that form the grid are
pooled from different administrative domains and applied to a common
task

7. Maximilien Brice, © CERN

8. Maximilien Brice, © CERN

9. Out-lines
 Introduction
 What is Cloud Computing
 History
 Architectural Layers & Cloud Services
 Software as a Service
 Platform as a Service
 Infrastructure as a Service
 Types of Clouds
 Why migrate to the Cloud?
 Effectiveness
 Limitations
 Issues & Concerns
 Conclusion

10. Architecture
 Most of the infrastructure consists of reliable services delivered through
data centers that are built on servers with different levels of virtualization
technologies
 Open standards and open software are critical to the growth and survival of
Cloud computing.

11. ROLE PLAYERS in the process
 1.CLIENTS
 2.DATA CENTER
 3.DISTRIBUTED SERVERS


12. CLIENTS..

13. Maximilien Brice, © CERN

15. Architectural Layers & Services
 Software as a Service
 Platform as a Service
 Infrastructure as a Service

16. Architectural Layers & Services
 Software as a Service (SaaS)
 Term was coined by John Koenig in 2005
 Software application delivery model where the vendor
develops and operates the software application for use
by its customers via the internet

17. Architectural Layers & Services
 Platform as a Service (PaaS)
 Provision of an environment that supports the life cycle
of web-application development available over the
internet
 Design
 Implementation
 Testing
 Deployment
 Hosting

18. Architectural Layers & Services
 Infrastructure as a Service (IaaS)
 Delivery of basic storage and computing capabilities as
standardized services over the internet.
 Provides:
 Software
 Memory
 Data center space
 Storage

19. Out-lines
 Introduction
 What is Cloud Computing
 History
 Architectural Layers & Cloud Services
 Software as a Service
 Platform as a Service
 Infrastructure as a Service
 Types of Clouds
 Why migrate to the Cloud?
 Effectiveness
 Limitations
 Issues & Concerns
 Conclusion

20. Types of Clouds
 Public
 External (3rd party provider)
 Private
 Internal
 Hybrid
 Both

21. Role Players
Cloud Providers
Provide infrastructure to SaaS providers and Cloud
users
Amazon
Salesforce.com
SaaS Providers/Cloud Users
Companies and web application developers that make
use of resources made available to them by Cloud
Providers
SaaS Users
Naïve end-users. Have little or no knowledge about
what goes on behind the Clouds.

22. Outline
Introduction
What is Cloud Computing
History
Architectural Layers & Cloud Services
Software as a Service
Platform as a Service
Infrastructure as a Service
Types of Clouds
Why migrate to the Cloud?
Effectiveness
Issues & Concerns
Conclusion

23. Why migrate to the Cloud?
 Pay-per-use model
 Only pay for what you use
 Low cost of renting
 Amazon Scalable Service (S3) charges $0.12 to $0.15
per gigabyte per month
 Reduce runtime and response time
 Split operations among multiple computing nodes

24. Why migrate to the Cloud?
 Security
 Advanced encryption algorithms
 Transparency
 Just use the services, cloud maintenance is for the
providers to worry about

25. Effectiveness of Cloud Computing
New York Times’ TimesMachine
Convert articles from 1851 – 1922 to PDF format
Could have taken 7 weeks but with cloud
computing technology, project was completed in 24
hours.
Animoto
Scaled easily from 50 to 3500 servers in just 3 days
MapReduce
Divide and conquer method is distributed across
multiple computers.

26. Outline
Introduction
What is Cloud Computing
History
Architectural Layers & Cloud Services
Software as a Service
Platform as a Service
Infrastructure as a Service
Types of Clouds
Why migrate to the Cloud?
Effectiveness
Issues & Concerns
Conclusion

27. Issues & Concerns
 Reliability
 Will the system be available all the time?
 January 2009: 40-minute outage at Salesforce.com
 Affected over 900,000 subscribers
 Portability
 Are services (business applications etc) and data
available from anywhere?

28. Issues & Concerns
 Privacy & Security
 Who has access to what resources
 What happens to your private data if
 You fail to pay your bills and your account is terminated?
 Government prompts your cloud provider for it?

29. Conclusion
 Cloud computing is here to stay
 There still exists the possibility of a single point of
failure, but probability of a failure is low because
of how well the infrastructure is implemented.
 It’s ability to expand and contract on demand
makes it very ideal for businesses

30.  http://www.youtube.com/watch?v=EzE6haADxRc&

31. Questions / Comments

32. Thank You!