Cloud computing encompasses applications and infrastructure delivered over the internet, categorized as software as a service (SaaS). It offers various deployment models, including community, public, and private clouds, each with unique benefits related to cost, privacy, and security. While it reduces hardware maintenance and improves data safety, it also has disadvantages such as dependency on internet connectivity and potential data loss risks.

1. CLOUD COMPUTING
(SAFARICOM CLOUD)
BEN W WAKHUNGU
CS282-0801/2009
LECTURER: DR. WAWERU

2. What is cloud computing?
 Cloud Computing refers to both the
applications delivered as services over the
Internet and the hardware and systems
software in the data Centres that provide
those services.
 The services themselves have long been
referred to as Software as a Service (SaaS).

3. Safaricom cloud
 sharing
Data +
Intelligence
Safaricom
Services
Third Party
Services

4. TYPES OF CLOUDS
TYPES: Cloud Computing for Education

5. DEPLOYMENT MODELS
 A community cloud may be established where several organizations
have similar requirements and seek to share infrastructure so as to
realize some of the benefits of cloud computing. With the costs
spread over fewer users than a public cloud (but more than a single
tenant) this option is more expensive but may offer a higher level of
privacy, security and/or policy compliance. Examples of community
cloud include Google's "Gov Cloud".
 When a Cloud is made available in a pay-as-you-go manner to the
general public, we call it a Public Cloud; the service being sold is
Utility Computing.
 Private Cloud refers to internal data centres of a business or
other organization, not made available to the general public.

6. Evolution of cloud
computing.
Distributed
Computing
Parallel
Computing
Mobil
phon
e
Grid
Computing
Cloud
Computing
6
P
D
A
Web
2.0enabled
PCs,
TVs, etc.
Ubiquitous
Computing
Busines
ses,
from
startups
to
enterpri
ses

7. Evolution Of Cloud Computing
 Cloud computing has as its antecedents both
client/server computing and peer-to-peer
distributed computing.
 It’s all a matter of how centralized storage
facilitates collaboration and how multiple
computers work together to increase
computing power.

8. Client/Server Computing
Centralized Applications
and Storage
All the software
applications, all the data,
and all the control
resided on huge
mainframe computers,
otherwise known as
servers.
Users connected to the
server via a computer
terminal, sometimes
called a workstation or
client. This computer was
sometimes called a dumb
terminal because it didn’t
have a lot (if any!)
memory, storage space,
or processing power.

9. Peer-to-Peer Computing
Sharing Resources
The obvious need to
connect one computer
to another without first
hitting the server led to
the development of
peer-to-peer (P2P)
computing.
P2P computing
defines a network
architecture in which
each computer has
equivalent capabilities
and responsibilities.

10. Distributed Computing
Providing More
Computing Power
When a computer is
enlisted for a
distributed computing
project, software is
installed on the
machine to run various
processing activities
during those periods
when the PC is typically
unused.
It’s a simple concept,
all about cycle sharing
between multiple
computers.

11. Collaborative Computing
Working as a Group
Early group
collaboration was
enabled by the
combination of several
different P2P
technologies. The goal
was (and is) to enable
multiple users to
collaborate on group
projects online, in real
time.
Most collaboration
systems offer the
complete range of
audio/video options, for
full-featured multipleuser video conferencing

12. Collaborative computing
 Real-time whiteboarding is also common,
especially in corporate and education
environments.
 Whiteboarding is where one or more users
“draw” on a virtual whiteboard that is
viewable by all the members of the group.

13. Parallel Computing
•use of two or more
processors (cores,
computers) in
combination to solve a
single problem with the
objective of running a
program in less time..

14. Grid computing
Sharing resources
Refer to resource-pooled
environments for running
compute jobs (like image
processing) rather than long
running processes (such as a
Web site or e-mail server.
This can be as simple as a
collection of computers
of similar computers
running on the same
operating system or as
complex as internetworked systems
comprised of every
computer platform you
can think of.

15. Why cloud computing?
 Cloud Computing: Advantages.
 Lower-Cost Computers for Users:
You don’t need a high-powered (and accordingly high-priced)
computer to run cloud computing’s web-based applications.
Because the application runs in the cloud, not on the desktop PC,
that desktop PC doesn’t need the processing power or hard disk
space demanded by traditional desktop software. Hence the client
computers in cloud computing can be lower priced, with smaller
hard disks, less memory, more efficient processors.

16. Why cloud computing
 Reduce capital and operations costs
 No longer required to make large up-front capital
investment on datacenters
 Eliminate the need to plan ahead for provisioning
 Allow companies to start small and increase their
resources investment as needed (pay-as-you-go.
 Simplify app deployment & management
 Common programming model across mobile, browser,
client, server, cloud
 Access to strong ecosystem of widely deployed
applications
 Integration with existing IT assets (Software +
Services)

17. Why cloud computing
 Fewer Maintenance Issues
Cloud computing greatly reduces both hardware
and software maintenance for organizations of
all sizes.
 Increased Data Safety
Unlike desktop computing, where a hard disk crash
can destroy all your valuable data, a computer
crashing in the cloud doesn’t affect the storage
of your data. That’s because data in the cloud is
automatically duplicated, so nothing is ever lost.

18. Disadvantages of cloud computing
 Requires a Constant Internet Connection
If you don’t have an Internet connection, you can’t
access anything, even your own documents. A dead
Internet connection means no work, period.
 Can Be Slow
Even on a fast connection, web-based applications can
sometimes be slower than accessing a similar
software program on your desktop PC. That’s
because everything about the program, from the
interface to the document you’re working on, has to
be sent back and forth from your computer to the
computers in the cloud.

19. Disadvantages of cloud computing
 If the Cloud Loses Your Data, You’re Screwed
Relying the cloud puts you at risk if the cloud lets
you down.
 Doesn’t Work Well with Low-Speed
Connections
Low-speed Internet connection, such as that found
with dial-up services, makes cloud computing
painful at best and often impossible. Web-based
apps often require a lot of bandwidth to
download, as do large documents.

20. Who Benefits from Cloud Computing?
 Let’s face it, cloud computing isn’t for everyone. What types of





users, then, are best suited for cloud computing—and which
aren’t?
Collaborators. If you often collaborate with others on group
projects, you’re an ideal candidate for cloud computing.
Road Warriors. Another prime candidate for cloud computing is
the road warrior. When you work at one office today, at home the
next day, and in another city the next, it’s tough to keep track of
all your documents and applications.
Cost-Conscious Users. save money on both
your hardware and software.
Cost-Conscious IT Departments. savings result from having to
buy fewer central servers.

21. Q&A
THANKS!