TECHNOLOGY GUIDE THREE Emerging Types of Enterprise Computing

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

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.

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

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

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

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.

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.

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.

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

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.