Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction. Key characteristics include broad network access, resource pooling, rapid elasticity, and measured service. Common deployment models are public, private and hybrid clouds. Common cloud services are Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS).

1. Presented
by
Sai Kumar. R
12691A0583

2. INTRODUCTION
• The actual term cloud borrows from
telephony in that telecommunication
companies, who until the 1990
primarily offered dedicated point to
point data circuits began offering
VIRTUAL PRIVATE NETWORK(VPN)
services with comparable quality of
service but at a much lower cost.

4. What is Cloud Computing?
• Cloud Computing is a general term used to describe a new
class of network based computing that takes place over the
Internet,
– basically a step on from Utility Computing
– a collection/group of integrated and networked hardware,
software and Internet infrastructure (called a platform).
– Using the Internet for communication and transport
provides hardware, software and networking services to
clients
• These platforms hide the complexity and details of the
underlying infrastructure from users and applications by
providing very simple graphical interface or API (Applications
Programming Interface).

5. CHARACTERISTICS
♥ Application programming interface.
♥ Device and location independence.
♥ Virtualization .
♥ Reliability.
♥ Maintenance .
♥ Security .
♥ Performance
♥ Agility.

6. Deployment Models
• Public cloud
• Private cloud
• Hybrid cloud

7. Types of cloud
Public cloud
•Public cloud (off-site and remote) describes cloud computing where resources are
dynamically provisioned on an on-demand, self-service basis over the Internet, via web
applications/web services, open API, from a third-party provider who bills on a utility
computing basis.
Private cloud
•A private cloud environment is often the first step for a corporation prior to adopting a
public cloud initiative. Corporations have discovered the benefits of consolidating shared
services on virtualized hardware deployed from a primary datacenter to serve local and
remote users.
Hybrid cloud
•A hybrid cloud environment consists of some portion of computing resources on-site
(on premise) and off-site (public cloud). By integrating public cloud services, users can
leverage cloud solutions for specific functions that are too costly to maintain on-premise
such as virtual server disaster recovery, backups and test/development environments.

8. Services
• Cloud Services can be dived into *3 stacks:
• 1. Infrastructure as a Service: IaaS
• 2. Platform as a Service: PaaS
• 3. Software as a Service: SaaS

9. Infrastructure as a Service (IaaS)
• IaaS is the delivery of technology
infrastructure as an on demand scalable
service
– Usually billed based on usage
– Usually multi tenant virtualized environment
– Can be coupled with Managed Services for
OS and application support

10. IaaS Examples

11. Platform as a Service (PaaS)
• PaaS provides all of the facilities required
to support the complete life cycle of
building and delivering web applications
and services entirely from the Internet.
– Typically applications must be developed
with a particular platform in mind
–Multi tenant environments
– Highly scalable multi tier architecture

12. PaaS Examples

13. Software as a Service? (SaaS)
• SaaS is a software delivery methodology
that provides licensed multi-tenant access
to software and its functions remotely as a
Web-based service.
– Usually billed based on usage
– Usually multi tenant environment
– Highly scalable architecture

14. SaaS Examples

15. Cloud Architecture

16. BENEFITS OF CLOUD
♣ Reduce spending on technology
♣Globalize your work force on the cheap
♣ Reduce capital cost
♣ Improve accessibility
♣ Improve flexibility
♣ Less personal training is needed
♣Monitor project more effectively
♣ Achieve economic of scale

17. Disadvantages of Cloud
Computing
Requires a constant Internet connection:
•Cloud computing is impossible if you
cannot connect to the Internet.
•Similarly, a low-speed Internet connection,
such as that found with dialup services,
makes cloud computing painful at best and
often impossible.

18. Some Commercial Cloud Offerings

19. CONCLUSION
• Cloud Computing holds some strong
promises
– Highly Available
– Dynamically allocate resources
– Pay only for resources that you use
• Cloud Computing is not yet well
understood