January 2018
Beginner to intermediate
412 pages
9h 33m
English
Content preview from Practical Big Data Analytics
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An intuitive introduction to MapReduce
Let's take the example of a hypothetical organization consisting of a CEO, directors, and managers. The CEO wants to know how many new hires have joined the company. The CEO sends a request to his or her directors to report back the number of hires in their departments. The directors in turn send a request to managers in their individual departments to provide the number of new hires. The managers provide the number to the directors, who in turn send the final value back to the CEO.
This can be considered to be a real-world example of MapReduce. In this analogy, the task was finding the number of new hires. Instead of collecting all the data on his or her own, the CEO delegated it to the directors and ...
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