Answered: se systems maintain copies of each data…

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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Parallel database systems maintain copies of each data item (or division) on many nodes, which is known as redundancy.
If copies of data items allocated to a node are distributed throughout many other nodes rather than maintaining all copies in the same node, explain why this is the preferred method. (or a collection of nodes)
The benefits and cons of using RAID storage as opposed to storing an extra copy of each data item is discussed in detail in Section B. b.

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