Course: Massive Data Analysis 2014/Hadoop Exercise

From VistrailsWiki
Jump to navigation Jump to search

Before you start

  • You must have Hadoop installed and working on your local machine. You also need to setup your Amazon AWS account. Refer to the instruction in the course page.
  • Download the following package: http://vgc.poly.edu/~fchirigati/mda-class/hadoop-exercise.zip. This package contains the basic WordCount example to help you get started.
  • What to submit
    • Code: place your code in a public GitHub repository
    • Results: put the results in your S3 bucket (don't forget to make it public)
    • Complete this form to add the links to your GitHub repository and S3 bucket. Deadline: 11:59 PM on the same day of class (Oct 6, 2014)

Hands-on exercises

  • Exercise 0: WordCount
    • Run the basic WordCount example on your local machine and AWS
    • Follow the instruction here to create your Amazon Elastic MapReduce (EMR): http://vgc.poly.edu/~fchirigati/mda-class/RunHadoopAWS.pdf
    • Instructions to run WordCount on your local machine and EMR cluster will be given in class
    • Note: You don't have to submit code and results for this exercise.
  • Exercise 1: Fixed-Length WordCount
    • For this exercise, you will only count words with 5 characters
    • Output: Key is the word, and value is the number of times the word appear in the input.
  • Exercise 2: InitialCount
    • Count the number of words based on theirs initial (first character), i.e., count the number of words per initial
    • The letter case should not be taken into account. For example, Apple and apple will be both counted for initial A
    • Output: Key is the initial (A to Z in UPPERCASE), and value is the number of words having that initial (in either uppercase or lowercase).
  • Exercise 3: Top-K WordCount
    • Output the top 100 most frequent 7-character words, in descending order of frequency