Parallel database systems store replicas of each data item (or partition) onmore than one node.a. Why is it a good idea to distribute the copies of the data items allocatedto a node across multiple other nodes, instead of storing all the copiesin the same node (or set of nodes).b. What are the benefits and drawbacks of using RAID storage instead ofstoring an extra copy of each data item?

Parallel database systems store replicas of each data item (or partition) onmore than one node.a. Why is it a good idea to distribute the copies of the data items allocatedto a node across multiple other nodes, instead of storing all the copiesin the same node (or set of nodes).b. What are the benefits and drawbacks of using RAID storage instead ofstoring an extra copy of each data item?

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter12: Secondary Storage Management

Section: Chapter Questions

Problem 6RQ

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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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