Transcript The Importance of IS Management

Distributed Systems:
The Overall Architecture
Chapter 5
Information Systems Management
In Practice 6E
McNurlin & Sprague
Introduction
Architecture vs.
Infrastructure
2
Attributes of Distributed Systems
1.
2.
3.
4.
Processing is distributed
Processors are interconnected
Databases are distributed
System-wide rules provide the
operating discipline for the
components to work together
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When to Distribute
1. Operations are interdependent
2. Businesses are homogenous
3. Corporate culture dictates
centralization of some
functions
4
Two Guiding Frameworks
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Seven Types of Distributed Systems
1. Host-Based Hierarchy
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Seven Types of Distributed Systems
2. Decentralized Stand-Alone Systems
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Seven Types of Distributed Systems
3. Peer-to-Peer LAN-Based Systems
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Seven Types of Distributed Systems
4. Hybrid
Enterprisewide
Systems
 CASE
EXAMPLE:
Northwest
Airlines
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Seven Types of Distributed Systems
5. Client-Server Systems
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Seven Types of Distributed Systems
6. Internet-Based Systems
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Seven Types of Distributed Systems
6. Internet-Based Systems
 Server-Based Computing
 CASE EXAMPLE: 3i
 Peer-to-Peer Computing
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Seven Types of Distributed Systems
7. Web Services
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Seven Types of Distributed Systems
7.
Web Services
 The Significance of Web Services
 CASE EXAMPLE: GM
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Defining the Overall IT Architecture
 The Job of the Chief Technology
Officer
 CASE EXAMPLE: FMC Corporation
 CASE EXAMPLE: The SABRE System
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Importance of IT Infrastructure
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Importance of IT Infrastructure
Three Views of Infrastructure:
1. As a utility
2. As dependent
3. As enabling
 CASE EXAMPLE: City of Sunnyvale
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Conclusion
Distributed Systems’
Domination
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