a simple introduction to cloud computing

1. CLOUD COMPUTING

2. Introduction
Cloud computing is where computing resources
are accessed from a virtual online "cloud" rather
than a local desktop or organizational data centre.

3. Contents
Background
Characteristics
Economics
Layers
Types
Advantages and
Disadvantages
Conclusion

4. Definition
Cloud computing is internet–based
computing, whereby:
 shared resources
 software
 information
are provided to computers and others devices
on demand, like the electricity grid.

5. Background
Reincarnation of centralized data processing
and storage as paralleled by the mainframe.
A mainframe (also known as Big Iron) is:
A large computer
Used by large organization
Used for bulk data processing

6. Background
A large network of computers.
Used by large organizations to provide
services to smaller ones and individuals.
Used for bulk data processing.
Synonyms: Grid Computing, SaaS, Network
Computing, Utility Computing.

7. Characteristics
Characteristics
Virtually
assemble
Pay-per-use
On-demand
self service
Offsite
technology
Shared
workloads
Massive
scale

8. Economics

9. Companies are looking for new ways to:
Reduce costs
• Pay for only what
we use
• Reduce hardware
investment
• Reduce software
licenses
• Lower labor and IT
support costs
• Lower outside
maintenance cost
Faster time to
value
• Quickly take
advantage of
latest
technologies
• Simplify updating
and upgrading
• Increase speed of
deployment
• Scale IT resources
to meet business
needs
Increase reliability
• Improve system
reliability
• Improve system
availability

10. Layers of the cloud
Client
Application
Platform
Infrastructure
Server

11. Important topics of cloud
computing
• The various types and vendors of cloud
computing services
• Advantages and disadvantages of cloud
computing

12. Types and vendors of cloud
computing services
Types of cloud
computing
Simplest form
More complex
form

13. Simplest form
Search engines
Webmail
BACK

14. More complex form
1. Web–based office application.
 Online photo and document sharing
Eg: ZOHO Work Online, Live Mesh
2. Branded, Domain-wide web service.
 Hosted spam filtering
Eg: postini, Google apps, Microsoft Office Live Beta
3. Large-scale web-based storage and computing power for
building your own application.
Eg: Amazon web services, Google app Engine
BACK

15. Advantages and disadvantages
• Lower software cost
• Improve performance
• Fewer maintenance issue
• Instant software updates
• Increased data safety
Advantages
• Requires a constant internet
connections
• Doesn’t not work well in low
speed connections
• May be slow
• Limited features
Disadvantages

16. Conclusions
Cloud computing increases profitability by
improving resource utilization. Costs are driven
down by delivering appropriate resources only for
the time those resources are needed.
 Cloud computing has enabled teams and
organizations to streamline lengthy procurement
processes.

17. Reference
• Wikipedia: Cloud Computing.
en.wikipedia.org/wiki/Cloud_computing
• Wikipedia: Mainframe Computer.
en.wikipedia.org/wiki/Mainframe_computer