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Database Systems: Design, Implemen...

12th Edition
Carlos Coronel + 1 other
Publisher: Cengage Learning
ISBN: 9781305627482

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Chapter
Section
BuyFindarrow_forward

Database Systems: Design, Implemen...

12th Edition
Carlos Coronel + 1 other
Publisher: Cengage Learning
ISBN: 9781305627482
Chapter 14, Problem 11RQ
Textbook Problem
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Explain the basic steps in MapReduce processing.

Program Plan Intro

MapReduce:

  • MapReduce is the processing layer of Hadoop.
  • It is an open source application programming interface that is designed to process large volumes of data in parallel.
  • The MapReduce framework had two main functions, Map and Reduce.
  • The function of the term Map is to take a job and divide into small units of work and the function of the term Reduce is to collect the output generated from different nodes and then integrating them into a single result set.

Explanation of Solution

Steps in MapReduce:

The following are the steps that are undergone during MapReduce processing.

  • Firstly, the client node submits a job to the assigned Job Tracker.
  • Then the Job Tracker has to determine where the data to be processed resides.
  • After which the Job Tracker has to contact with the Task Tracker...

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