Write a python mapper and reducer script that would calculate the number of rating records provided each year-month. b)Can you generalise your Hadoop streaming job so that we are given the option through a parameter
Write a python mapper and reducer script that would calculate the number of rating records provided each year-month. b)Can you generalise your Hadoop streaming job so that we are given the option through a parameter
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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Write a python mapper and reducer script that would calculate the number of rating records provided each year-month.
b)Can you generalise your Hadoop streaming job so that we are given the option through a parameter at run time, to choose whether the number of rating records should be calculated for each year-month or for each day-of-the-week? Provide the amended Python scripts as well as the Hadoop streaming commands and explain the programming logic.
(looking for the answer of question b)
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