DISTRIBUTED SYSTEMS PRINCIPLES AND PARADIGMS PROBLEM SOLUTIONS ANDREW S. TANENBAUM MAARTEN VAN STEEN Vrije Universiteit Amsterdam‚ The Netherlands PRENTICE HALL UPPER SADDLE RIVER‚ NJ 07458 SOLUTIONS TO CHAPTER 1 PROBLEMS 1. Q: What is the role of middleware in a distributed system? A: To enhance the distribution transparency that is missing in network operating systems. In other words‚ middleware aims at improving the single-system view that a distributed system should have. 2
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Geoffrey Banks POS/355 Paul Rouk April 15‚ 2013 Distributed Systems According to Andrew Tanenbaum “A distributed system is a collection of computers that appear to its users as a single coherent system.” (http://www.cs.helsinki.fi/u/alanko/hj/K06/kalvokopiot/ch1_p6.pdf) Almost every current company uses distributed systems connected to servers and even larger databases. Each of these companies connects their organization and its information through local area networks also connected through
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Case Analysis van der Steen Candy Company I. Identification and Explanation of Underlying Problems and/or Issues a) Issues: Running a business‚ like that of van der Steen Candy Company is never a particularly easy task‚ especially when there are external macroenvironmental factors that become issues that impact the success of the company. For instance‚ the fact that van der Steen Candy Company was selling candies to a select group of customers is significant to note. Although van der Steen’s
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LESSON 1: DISTRIBUTED SYSTEMS CONTENTS 1.0 Aim and Objectives 1.1. Introduction 1.2. Organization 1.3. Goals and Advantages 1.4. Disadvantages 1.5. Architecture 1.6. Concurrency 1.7. Languages 1.8. Let us Sum UP 1.9. Lesson-End Activities 1.10. Points for Discussion 1.11. References 1.0. AIM AND OBJECTIVES At the end of this Lesson you will be able to understand the concept of Distributed Computing‚ organization of Distributed Computing‚ advantages and limitations of Distributed Computing
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Distributed Systems 6. Name Services Werner Nutt 1 Naming Concepts Names = strings used to identify objects (files‚ computers‚ people‚ processes‚ objects) Textual names (human readable) – used to identify individual services‚ people • email address: Hans.Mair@inf.unibz.it • URL: www.google.com – or groups of people or objects • mailing lists: professors@unibz.it • mail domains (if there are several mail exchangers) 2 Naming Concepts (cntd) Numeric addresses (identify the location
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Van Der Steen Candy Company Marketing Case Analysis 1. Identification and explanation of underlying problems and/or issues A) Issues that impact the success of the company: Demographic: 25% business 75% consumers‚ foot traffic Social/Cultural: Seasonal business‚ gifts‚ quality conscious‚ health conscious Economic: Premium-discretionary item‚ inflation (ingredient prices) Capital/Legal: haven’t been affected by urban renewal Competitive: Market structure‚ monopolistic competition
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CHUKA UNIVERSITY DEPARTMENT OF COMPUTER SCIENCE COMP 414:DISTRIBUTED ASSIGNMENT 1‚ DUE DATE 31/01/2014 (a) With examples describe Access‚ Location and Migration transparency in a distributed system. (4mks) Access Transparency: Clients should be unaware of the distribution of the files. The files could be present on a totally different set of servers which are physically distant apart and a single set of operations should be provided to access these remote as well as the local files. Applications
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CUIT 406 Distributed System Lecturer: Mr. A. Gamundani Assignment: 1 Due Date: 23 September 2013 QUESTION 1 a) Differentiate between loosely coupled systems and tightly coupled systems. [6] Tightly coupled systems Loosely coupled
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dynamically‚ as needed. The central aim of having multiple threads of execution is to maximize the degree of concurrent execution between operations. Operating system architecture There are two key examples of kernel design: the so-called monolithic and microkernel approaches: Monolithic: It is massive – it performs all basic operating system functions and takes up in the order of megabytes of code and data – and that it is undifferentiated Microkernel: The kernel provides only the most basic
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DISTRIBUTED SYSTEMS ASSIGNMENT AND CAT QUESTIONS QUESTION 1 a) Give four examples of resources that may be shared in a distributed system.( 4marks) Possible examples are: hardware resources (disk space‚ printers‚ memory‚ CPU power‚ etc) and data/software resources (distributed objects‚ web-pages‚ Databases‚). b) What is the role of middleware in a distributed system? To enhance the distribution transparency that is missing in network operating systems. In other
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