Give two reasons why caches are useful. What problems do they solve? What problems do they cause? If a cache can be made as large as the device for which it is caching (for instance, a cache as large as a disk), why not make it that large and eliminate the device?

Give two reasons why caches are useful. What problems do they solve? What problems do they cause? If a cache can be made as large as the device for which it is caching (for instance, a cache as large as a disk), why not make it that large and eliminate the device?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Give two reasons why caches are useful. What problems do they
solve? What problems do they cause? If a cache can be made as
large as the device for which it is caching (for instance, a cache as
large as a disk), why not make it that large and eliminate the
device?

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Think about the difference that exists between a cache that is totally associative and one that is directly mapped. This is a distinction that has to be made.
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Solve the short questions
Think about the distinction that exists between a cache that is completely associative and one that is directly mapped.