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Introduction to Architecture Models

Satya,Spandana,Prameela,Deelip,Rambabu,Bhavani, Sunil

Team members:

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ContentsIntroduction2-tier Architecture3-tier Architecture

N-tier Architecture

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Introduction

The software architecture of a program or computing system is the structure or structures of the system , which comprise softwarecomponents, the externally visible properties of

those components, and the relationships betweenthem.

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Introduction

The World Wide Web provides a way for humancommunication in computer networking which had animpact on the delivery of information.Important trends used to develop new web

technology and services are:Ø UbiquityØ Dynamic contentØ Reliance on Open Standards

Ø Reliance on Open Source

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Introduction

ü Ubiquity : decreases in the size of web server hardware and software, web services embedded innumerous consumer items, wirelesscommunications, and protocols to support mobilenetworking.

ü Dynamic content : use of Java as well as bothserver-side and client-side scripting languages,video/audio/text conferencing, more sophisticated

services hiding behind web front-ends.

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Introduction

ü Reliance on open standards and open source : software quality and reliability are not correlated withthe cost of software or its associated support services;innovation is often more rapid where source code isopenly available.

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2-tier Architecture

ü Developed in the 1980sü It is also called as Client/Server Architectureü intended to improve Usability

UIUsability

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2-tier Architecture

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2-tier Architecture

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2-tier Architecture

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2-tier Architecture

Simplicity

Securityreliabilityscalability

Disadvantages

Advantages

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3-tier Architecture

Business logic is a non-technical term generally used todescribe the functional algorithms that handleinformation exchange between a database and a user interface .

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3-tier Architecture

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3-tier Architecture

v Removes high processing burden from client machines.

v No need of high bandwidth.v Less no. of updations are required .

AdvantagesAdvantages

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3-tier Architecture

v Development Issues

v Performance Issues

DisadvantagesDisadvantages

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N-tier Architecture

Distributed applicationDistributed application : Programs run on two: Programs run on twoor more host computers.or more host computers.

N-Tier: An unlimited number of tiers .

Each tier may have multiple computers.

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N-tier Architecture

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Effective N-tier Architecture Features

•Performance•Reliability•Usability•Security

•Availability•Scalability•Maintainability

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N-tier ArchitectureAdvantages

Ø Better scalabilityØ Higher fault toleranceØ Higher throughput for less cost

DisadvantagesØ Too much middleware involvedØ Redundant functionalityØ Difficulty and cost of development

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COMMENTS

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THAN Q