WEB APP ARCHITECTURES
WEB APP ARCHITECTURES:
MULTI-TIER (2-TIER, 3-TIER) MODEL-VIEWER-CONTROLLER (MVC) REST ARCHITECTURAL STYLE
Slides created by Manos Papagelis Based on materials by Marty Stepp, M. Ernst, S. Reges, D. Notkin, R. Mercer, R. Boswell,Wikipedia
Overview
? Data Independence in Relational Databases ? N-tier Architectures ? Design Patterns
? The MVC Design Pattern
? REST Architectural Style
Data Independence in Rel. DBMS
Database Architecture With Views
4
User1
User2
View1
View2
What users see
Conceptual Schema
Tables and links
Internal Schema
Files on disk
Disk
Each level is independent of the levels below
Logical and Physical Independence
User1
User2
View1
View2
Conceptual Schema Internal Schema
Logical Independence
Physical independence
Disk
Each level is independent of the levels below
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