Lecture2 - COT 5611 Operating Systems Design Principles...

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Unformatted text preview: COT 5611 Operating Systems Design Principles Spring 2012 Dan C. Marinescu Office: HEC 304 Office hours: M-Wd 5:00-6:00 PM Lecture 2 – Wednesday January 11 n Reading assignment: class slides 1. Man-made systems and the environment 2. Complex systems 1. Factors affecting complexity 2. Sources of complexity 3. Coping with complexity 1. Modularity 2. Abstractions 3. Hierarchy 4. Characteristics of complex systems 1. Propagation of effects 2. Incommensurate scaling 3. Tradeoffs 2/16/12 2 Lecture 2 Systems and the environment n System a set of interconnected components that has a an expected behavior observed at the interface with its environment n The environment a critical component to be considered in the design of any system n The systems we are concerned consist of ¨ hardware and ¨ software 2/16/12 3 Lecture 2 Man-made systems n Basic requirements for man-made systems: ¨ Functionality ¨ Performance ¨ Cost n All systems are physical the laws of physics governing the functioning of any system must be well understood. n Physical resources are limited. 2/16/12 4 Lecture 2 Complex systems n Large number of components n Large number of interconnections n Many irregularities n Long description n For man-made systems: a team of designers, implementers, and maintainers. 2/16/12 5 Lecture 2 Issues faced by the designer of a complex system n Emerging Properties n Propagation of effects n Incommensurate scaling n Tradeoffs 2/16/12 6 Lecture 2 Emerging properties...
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This note was uploaded on 02/15/2012 for the course COP 5611 taught by Professor Staff during the Spring '08 term at University of Central Florida.

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Lecture2 - COT 5611 Operating Systems Design Principles...

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