HDFS and MapReduce: Revolutionizing Big Data Processing
HDFS and MapReduce can be confusing at times. Let’s break down the entire process step-by-step with a concrete example. The example I’m going to use is calculating the average movie rating per genre from a CSV file. First, we have to upload the CSV file into HDFS, and then we will run a MapReduce job to compute the average ratings. We assume: Data format: genre,rating Goal: average rating per genre ...