Principles of Computer System Design - An Introduction (Part I)
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1
CHAPTER
Systems
Overview ....................................................................................................................2
1.1 Systems and Complexity ................................................................................................ 3
1.1.1 Common Problems of Systems in Many Fields ...........................................3
1.1.2 Systems, Components, Interfaces, and Environments .................................8
1.1.3 Complexity ..........................................................................................10
1.2 Sources of Complexity .......................................................................................13
1.2.1 Cascading and Interacting Requirements ................................................13
1.2.2 Maintaining High Utilization ..................................................................17
1.3 Coping with Complexity I ...................................................................................19
1.3.1 Modularity ...........................................................................................19
1.3.2 Abstraction ..........................................................................................20
1.3.3 Layering ..............................................................................................24
1.3.4 Hierarchy ............................................................................................25
1.3.5 Putting it Back Together: Names make Connections .................................26
1.4 Computer Systems are the Same but Different .....................................................27
1.4.1 Computer Systems have no Nearby Bounds on Composition ......................28
1.4.2 d(technology)/dt is Unprecedented .........................................................31
1.5 Coping With Complexity II .................................................................................35
1.5.1 Why Modularity, Abstraction, Layering, and Hierarchy aren’t Enough .........36
1.5.2 Iteration ..............................................................................................36
1.5.3 Keep it Simple .....................................................................................39
What The Rest of this Book is About ...........................................................................40
Exercises .................................................................................................................41
CHAPTER CONTENTS
Principles of Computer System Design: An Introduction
Copyright © 2009 by Jerome H. Saltzer and M. Frans Kaashoek. All rights of reproduction in any form reserved.
DOI: 10.1016/B978-0-12-374957-4.00009-8
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