1. TECHNOLOGY GUIDE THREE
Emerging Types of Enterprise Computing

2. TECHNOLOGY GUIDE OUTLINE
TG3.1 Introduction
TG3.2 Server Farms
TG3.3 Virtualization
TG3.4 Grid Computing
TG3.5 Utility Computing
TG3.6 Cloud Computing
TG3.7 Emerging Software Trends

3. LEARNING OBJECTIVES 1. Describe the evolution of IT infrastructure.
2. Describe a server farm.
3. Define virtualization, and discuss its advantages.
4. Define grid computing, and discuss its advantages.
5. Define utility computing, and discuss its advantages.

4. LEARNING OBJECTIVES (continued)
6. Define cloud computing, and analyze its advantages and disadvantages.
7. Define and discuss Web services and service-oriented architecture.

5. TG3.1 Introduction Stages in the evolution of IT infrastructure:
Standalone mainframe
Mainframe and dumb terminals
Standalone personal computers
Local area networks (client/server computing)
Enterprise computing
Cloud computing and mobile computing

6. TG3.2 Server Farms
A server farm contains hundreds of thousands of networked computer servers.
Source: Media Bakery

7. TG 3.3 Virtualization Benefits
Cost Savings due to lower number of physical servers
Enhanced Agility
More Service Oriented Focus of IT Department
Server virtualization uses software to create partitions on a single server so that multiple applications
can run on a single server.

8. TG 3.4 Grid Computing Benefits
Utilizes computing resources efficiently
Enables Applications to run faster
Provides Fault tolerance and redundancy
Makes it easy to “scale up” or “scale down”
Grid computing involves applying the resources of many computers in a network to a single problem at the same time.

9. TG3.6 Cloud Computing
In cloud computing, tasks are performed by computers physically removed from the user and accessed over
a network, in particular the Internet.
The cloud in this figure represents the Internet. Various companies’ data centers are connected to the Internet. When you make a query to Google, Yahoo, or Amazon (for example), your request travels over the Internet to one of their data centers. As many servers as are needed are brought to bear answering your query. The response is then sent back to you.

10. Cloud Computing Services
Cloud infrastructure as a service Cloud platform as a service Cloud software as a service

11. TG3.7 Emerging Software Trends
Web Services Service-Oriented Architecture
Web services are applications delivered over the Internet that users can select and combine through almost any device, from personal computer to cell phones.
A service-oriented architecture is an IT architecture that makes it possible to construct business applications using web services.