Review Figure 11-6 and answer the following questions based on it. a. What has happened between Input

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Review Figure 11-6 and answer the following questions based on it.

a. What has happened between Input and Input'?

b. Assume that the values associated with each of the keys (kl, k2, etc.) are counts. What is the purpose of the Shuffle stage?

c. If the overall goal is to count the number of instances per key, what does the role of the Reduce stage have to be?

Schematic representation of MapReduce FIGURE 11-6 Map Shuffle Reduce ndu Input' kt: 3; k5: 2 k2: 2; k5: 1 k2: 1; k3: 4 k

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Modern Database Management

ISBN: 978-0133544619

12th edition

Authors: Jeff Hoffer, Ramesh Venkataraman, Heikki Topi

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Question Posted: Dec 20, 2015 02:53 AM

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Review Figure 11-6 and answer the following questions based on it. a. What has happened between Input

Question:

Schematic representation of MapReduce FIGURE 11-6 Map Shuffle Reduce ndu Input' kt: 3; k5: 2 k2: 2; k5: 1 k2: 1; k3: 4 k4: 2; k5: 2 kt:3 k2: 2,1 k3: 4 k4: 2 k5: 2,1,2 R. R.

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MapReduce algorithm a Input Input divides the computing task into multiple componen...View the full answer

Modern Database Management

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