Cloud computing allows users to access computer programs, files, and other applications remotely through the internet instead of having to install and run them locally. It offers three main models - Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). SaaS provides access to applications, PaaS provides platforms for developing applications, and IaaS provides basic computing infrastructure and storage. The cloud offers benefits like reduced costs, flexibility, and maintenance being handled by the cloud provider, but also risks like dependence on the cloud provider and internet connectivity.

1. CLOUD
COMPUTING
By,
Vasanth.N

2. Do you Use the Cloud?

3. A cloud service has three distinct characteristics
that differentiate it from traditional hosting. It is
sold on demand, typically by the minute or the
hour; it is elastic - a user can have as much or as
little of a service as they want at any given time;
and the service is fully managed by the provider.
Definition

4. Let Us Imagine…
Let's say you're an executive at a large corporation.
Your particular responsibilities include making sure that
all of your employees have the right hardware and
software they need to do their jobs. Buying computers
for everyone isn't enough, you also have to purchase
software or software licenses to give employees the
tools they require. Whenever you have a new hire,
you have to buy more software or make sure your
current software license allows another user. It's so
stressful that you find it difficult to go to sleep on your
huge pile of money every night..!!

5. Soon, there may be an alternative for executives like
you. Instead of installing a suite of software for each
computer, you'd only have to load one application.
That application would allow workers to log into a
Web-based service which hosts all the programs the
user would need for his or her job. Remote machines
owned by another company would run everything
from e-mail to word processing to complex data
analysis programs. It's called cloud computing, and it
could change the entire computer industry.
This is What the cloud is..!!

6. Let Me Explain…

7. • Computers have internal or hard drive storage(C:
Drive)
• CPU has a drive for storing programs, documents,
pictures, videos, presentations, etc…
Computer Storage
Standard Computer Tower
or Central Processing Unit
(CPU)
Inside the Computer

8. • Purchase programs
• Load to the computer
• Each computer would need the program loaded
and stored on the internal drive
Programs

9. External Storage
External Hard DriveCD/DVD Thumb Drive
SD Card Micro SD Card
• Allows your content to become mobile
• Save to the storage device
• Take device to any compatible computer
• Open and use content

10. • Multiple work stations talk to one unit that stores
information and data.
• Data is not saved to the C: drive, but to a network
drive
• Can retrieve the data stored to the network from
any of the connected workstations.
Networked Storage

11. So what is the cloud?
Computing and software resources that are delivered on demand, as
service.

12. How Does it work???

13. Software as a Service (SaaS)
SaaS is a software distribution model in which
applications are hosted by a vendor or service
provider and made available to customers over a
network, typically the Internet.

14. Platform as a Service (PaaS)
PaaS is a way to rent hardware, operating systems,
storage and network capacity over the Internet. The
service delivery model allows the customer to rent
virtualized servers and associated services for running
existing applications or developing and testing new
ones.
Example : Google App Engine, Microsoft SQL Server Data Services, Engine
Yard, Salesforce.com’s Force.com

15. Infrastructure as a Service (IaaS)
IaaS is a provision model in which an organization
outsources the equipment used to support operations,
including storage, hardware, servers and networking
components. The service provider owns the
equipment and is responsible for housing, running and
maintaining it. The client typically pays on a per-use
basis.
• E.g.: Akamai, Amazon EC2, CohesiveFT, Mosso, Joyent Accelerators

16. Inside a Cloud
Virtualized CPUs and Storage
Physical Servers across the Globe
Software Platform
The Cloud Platform
Software as a
Service (SaaS)
Platform as a
Service (PaaS)
Infrastructure as a
Service (IaaS)
Virtual Servers
Virtual Storage
Network Routers
Java Runtime
Web 2.0 Runtime
LAMP / WAMP
Corporate Email
Business Processes
CRM, ERP, HR
Physical Servers

17. Deployment Models

18. Benefits

19. They own the hardware
They maintain the system
They train and support users
Benefits

20. • Your data is not directly in your hands,
but in the hands of a third party.
• Total Dependence on the Internet Connection.
• If your cloud Host disappears,
where does your information go?

21. THANK YOU..!!!