lec02 - Lecture 2: OS Structures (Chapter 2.7) Operating...

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1.1 Silberschatz, Galvin and Gagne ©2009 Operating System Concepts – 8 th Edition Lecture 2: OS Structures (Chapter 2.7)
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1.2 Silberschatz, Galvin and Gagne ©2009 Operating System Concepts – 8 th Edition Operating System Design and Implementation ± Start by defining goals and specifications z Affected by choice of hardware, type of system z User goals and System goals z User goals – convenient to use, easy to learn, reliable, safe, and fast z System goals –easy to design, implement, and maintain, as well as flexible, reliable, error-free, and efficient ± Important principle to separate Policy: What will be done? Mechanism: How to do it? ± Mechanisms determine how to do something, policies decide what will be done z The separation of policy from mechanism is a very important principle, it allows maximum flexibility if policy decisions are to be changed later
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1.3 Silberschatz, Galvin and Gagne ©2009 Operating System Concepts – 8 th Edition MS-DOS Monolithic Structure
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1.4 Silberschatz, Galvin and Gagne ©2009 Operating System Concepts – 8 th Edition Traditional UNIX System Structure
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lec02 - Lecture 2: OS Structures (Chapter 2.7) Operating...

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