UNIT 1

1. CS8791 CLOUD COMPUTING

2. INTRODUCTION
 Cloud computing refers to both the applications
delivered as services over the Internet and the hardware
and system software in the datacenters that provide
those services.
 Cloud computing is an Internet ("cloud") based
development and use of computer technology
("computing").
 With Cloud computing users can access database
resources via the Internet from anywhere.

3. HISTORY
 Concept evolved in 1950(IBM) calledRJE (Remote Job
Entry Process).
 In 2006 Amazon provided First publiccloud
AWS(Amazon Web Service).

4. What is Cloud Computing?
 Distributed computing on Internet or delivery of
computer services over the internet.
Eg:Gmail,Yahoo,Hotmail
 Instead of running email program on your computer
you login to a web email account remotely.
 The software and storage for your account doesn’t
eist on your computer.

5. How to Implement cloud
computing?
 Open source software has provided the
foundation for many cloud computing implementations.
 The cloud computing environment can consist
of multiple types based on their deployment and usage.
Types
Public clouds
Private clouds
Hybrid clouds
External clouds

6. Architecture
The two most significant components of cloud
computing architecture are known as the front
end and the back end. The front end is the part
seen by the client, i.e. the computer user.

7. Layers of the cloud
Client
Application
Platform
Infrastructure
Server

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

9. SERVICE MODELS
 Cloud computing providers offer their services according to
three fundamental models:
Infrastructure as a service
(IaaS)
Platform as a service
(PaaS)
Software as a service
(SaaS)

10. Variations of cloud computing
Clouds can be classified as:
 Infrastructures
 Platforms
Applications

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

12. Simplest form
Search engines
Webmail
BAC
K

13. 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

14. 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

15. 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.

16. REFERENCE
Mastering Cloud computing foundation and
application programming rajkumar
buyya,christian vecchiola,s.Tamarai selvi.
Wikipedia: Cloud Computing.
en.wikipedia.org/wiki/Cloud_computing
https://www.slideshare.net/devashish19gupta/c
loud-computing-introductory1