History of Cloud
Components Of Cloud Computing
Common characteristics of Cloud Computing
Cloud Service models
Types Of Cloud
Properties of Cloud Computing
Cloud Operating Systems
Advantage & Disadvantage
What is Cloud Computing?
An environment created in a user’s machine from an on-line
application stored on the cloud and run through a web browser.
In simple Cloud computing is using the internet to access
someone else's software running on someone else's hardware
in someone else's data center.
It involves deploying groups of remote servers and software
networks that allow centralized data storage and online access
to computer services or resources.
Clients are the device that the end user interact with cloud.
They are three types of clients:
3) Thin (Most Popular)
It is collection of servers where
application is placed and is accessed
FLEXIBLE PRICING - PAY PER USE
• Flexible On-demand self-service
• Ubiquitous network access
• Resource pooling (advanced virtualization)
• Rapid elasticity
• pricing - Pay per use
Cloud Service models:
Cloud computing providers offer their
services according to several fundamental
Software as a Service (SaaS)-End
Platform as a Service (PaaS)-
Infrastructure as a Service (IaaS)-
Software as a Service (SaaS):
Software hosted in the cloud
Web browser access
E.g. : G-mail, Yahoo mail, Hotmail etc.
They can provide security features such as SSL encryption, a
Customers can utilize greater computing power while saving on
Platform as a Service (PaaS):
Host provides software development platform
Customer creates software
Host provides hardware
E.g.: Salesforce.com, Windows Azure etc.
Infrastructure as a Service (IaaS) :
It also known as hardware as a service.
It is a computing power that you can rent for a limited period of
It allows existing applications to be run on a cloud suppliers
Infrastructure providers can dynamically allocate resources.
Shared by several organizations and supports a specific
community that has shared concerns.
Operated solely for an organization or company.
E.g. : HP data center, IBM, Sun, Oracle, 3tera.
Available to the general public or large industry group and its
owned by an organization selling cloud services.
E.g. : Amazon, Google, Microsoft, Sales force.
Combination of two of the above, they remain unique entities
but are bound together by standardized technologies.
Individual users connect to the cloud from their own personal computers or
portable devices, over the Internet. To these individual users, the cloud is
seen as a single application, device, or document.
The hardware in the cloud (and the operating system that manages the
hardware connections) is invisible.
Properties of cloud computing:
It is User Centric (P2P).
It is Task Centric.
It is Powerful (NASA).
It is Intelligent.
It is Accessible.
It is Programmable (Data loader and Replication).
Distributed and Collaborative Computing.
SECURITY AND PRIVACY:
• Identify management
• Physical and personal
• Application security
• Legal issues
Why cloud service is popular?
Reduce the complexity of networks.
Do not have to buy software licenses.
Cloud providers that have specialized in a particular area (such
as e-mail) can bring advanced services that a single company
might not be able to afford or develop.
scalability, reliability, and efficiency.
Info. at cloud are not easily lost
Software as a Subscription.
Reduced Software Maintenance.
Latest version availability.
Reduced Software Cost.
Instant Software Updates.
Unlimited Storage Capacity.
Device Independence and the “always on!, anywhere and any place”
Free From Maintenance and the “no-need-to-know”
Requires a constant Internet
Features might be limited.
App performance could suffer.
Stored data can be lost.
Stored data might not be secure.
Cloud computing is impossible if you
cannot connect to the Internet.
When you are offline, cloud
computing simply does not work.
Future of CLOUD COMPUTING
The 55% of respondents believe that cloud computing has a lower
total cost of ownership (TCO).
74 percent of respondents indicated that cloud computing would
either lead to an increase in hiring or have no impact, while rest of
respondents expected any decrease in hiring based on cloud
39 percent indicating that the cloud would make for less or more