AGENDA
 Introduction
 What is Cloud Computing
 Layers of Cloud Computing
 Types Of Cloud Computing
 Advantage of Cloud Computing
 Disadvantage of Cloud Computing
 Examples of Amazing Cloud System
 Future Trends
 Conclusions

Introduction
The cloud is something that you have been using for a long time
now in the form of the Internet. Then, what is it that is creating this buzz
about cloud computing. So here are the cloud computing features that
make it the latest sensation promising to shape the entire future of
modern computing. The cloud computing benefits are so immense that it
is looked upon as a utility model of computing, with which an application
can start small and grow to be enormous overnight.
In 2008 Oracle CEO Larry Ellison said “The computer industry is
the only industry that is more fashion-driven than women’s fashion.” to
a group of Oracle analysts. So let’s talk about what cloud computing is
and tighten up our definition and understanding of this implementation.

What is Cloud Computing?
Cloud Computing refers to both the applications delivered as
services over the Internet and the hardware and systems software in
Internet infrastructure (called a platform).
Hide the complexity infrastructure by providing very simple
graphical interface or API (Applications Programming Interface).
Provides on demand services, that are always on, anywhere,
anytime and any place.
Pay for use and as needed, elastic.
The hardware and software services are available to the general
public, enterprises, corporations and businesses markets.

Cloud Architecture

Commercial Cloud Offerings

Cloud Provides

Layers
Layers of Cloud Computing

Infrastructure as a Service (IaaS)
Access to infrastructure stack:
 Full OS access
 Firewalls
 Routers
 Load balancing
Advantages :
 Pay per use
 Instant Scalability
 Security
 Reliability
 APIs

Platform as a Service (PaaS)
Popular services :
 Storage
 Database
 Scalability

Software as a Service (SaaS)
 No hardware or software to manage
 Service delivered through a browser
Advantages :
 Pay per use
 Instant Scalability
 Security
 Reliability
 APIs

Virtualization
Virtualization an abstraction of an execution environment that
can be made dynamically available to authorized clients by using well-
defined protocols.
–Resource quota (e.g. CPU, memory share),
–Software configuration (e.g. O/S, provided services).
Implement on Virtual Machines (VMs):
–Abstraction of a physical host machine,
–Hypervisor intercepts and emulates instructions from VMs, and
allows management of VMs,

Paravirtualization
Paravirtualization allows multiple operating systems to run on a
single hardware device at the same time by more efficiently using
system resources, like processors and memory.
Runs better than the full virtualization model, simply because in
a fully virtualized deployment, all elements must be emulated.
In a paravirtualized deployment, many different operating
systems can run simultaneously.

Paravirtualization In Different OS

Cloud Computing types
 Hybrid cloud
 Private cloud
 Public cloud
 Community cloud

Advantages of Cloud Computing
 Lower computer costs.
 Improved performance.
 Reduced software costs.
 Instant software updates.
 Improved document format compatibility.
 Unlimited storage capacity. ( pbytes !!!)
 Increased data reliability.
 Universal document access
…..
 Easier group collaboration
 Device independence

Disadvantages of Cloud Computing
 Requires a constant Internet connection.
 Features might be limited.

Amazon Web Services
•Elastic Compute Cloud (EC2)
–Rent computing resources by the hour
–Basic unit of accounting = instance-hour
–Additional costs for bandwidth
•Simple Storage Service (S3)
–Persistent storage
–Charge by the GB/month
–Additional costs for bandwidth

Operating System In Cloud
You can try from online at home.
http://beta.cloudo.com/

The Future Trends
 Many of the activities loosely grouped together under cloud
computing have already been happening and centralized computing
activity is not a new phenomena.
 Grid Computing was the last research-led centralized approach.
 However there are concerns that the mainstream adoption of cloud
computing could cause many problems for users.
 Whether these worries are grounded or not has yet to be seen.
 Many new open source systems appearing that you can install and
run on your local cluster – should be able to run a variety of
applications on these systems.

Conclusion
Cloud Computing is the fastest growing part of IT
 Tremendous benefits to customers of all sizes.
 Cloud services are simpler to acquire and scale up or down.
 Key opportunity for application and infrastructure vendors.
 Public clouds work great for some but not all applications.
 Private clouds offer many benefits for internal applications.
 Public and private clouds can be used in combination.
 Economic environment is accelerating adoption of cloud solutions

Questions?