Distributed Systems: The Overall Architecture Chapter 5 Information Systems Management In Practice 6E McNurlin & Sprague

2 Introduction Architecture vs. Infrastructure

3 Attributes of Distributed Systems 1. Processing is distributed 2. Processors are interconnected 3. Databases are distributed 4. System-wide rules provide the operating discipline for the components to work together

4 When to Distribute 1. Operations are interdependent 2. Businesses are homogenous 3. Corporate culture dictates centralization of some functions

5 Two Guiding Frameworks

6 Seven Types of Distributed Systems 1. Host-Based Hierarchy

7 Seven Types of Distributed Systems 2. Decentralized Stand-Alone Systems

8 Seven Types of Distributed Systems 3. Peer-to-Peer LAN-Based Systems

9 Seven Types of Distributed Systems 4. Hybrid Enterprise- wide Systems  CASE EXAMPLE: Northwest Airlines

10 Seven Types of Distributed Systems 5. Client-Server Systems

11 Seven Types of Distributed Systems 6. Internet-Based Systems

12 Seven Types of Distributed Systems 6. Internet-Based Systems  Server-Based Computing  CASE EXAMPLE: 3i  Peer-to-Peer Computing

13 Seven Types of Distributed Systems 7. Web Services

14 Seven Types of Distributed Systems 7. Web Services  The Significance of Web Services  CASE EXAMPLE: GM

15 Defining the Overall IT Architecture  The Job of the Chief Technology Officer  CASE EXAMPLE: FMC Corporation  CASE EXAMPLE: The SABRE System

16 Importance of IT Infrastructure

17 Importance of IT Infrastructure Three Views of Infrastructure: 1. As a utility 2. As dependent 3. As enabling  CASE EXAMPLE: City of Sunnyvale

18 Conclusion Distributed Systems’ Domination