Reduce Side Join

Programming Lab 5: Reduce Side Join

1. This lab demonstrates reduce-side join with different reducers

Problem to Solve

1. We will work with two sets of data OrgChart and Salary, and we will need to join them together using Reduce Side join technique
2. However, in some cases position description can consist of two different words and we only will compare the first one

 

Create Project and Link with Libraries

1. Copy provided libraries and java code from USB drives
2. Create project in NetBeans or Eclipse
3. Link with libraries
4. Create new classes for each file with the same name as file in the directory or you can copy java files to your source directory
5. For detailed instructions on creating a project please refer to Programming Lab1

Walk Through

1. Please, make sure to adjust input path to your local machine

2. We must assign different mappers to different input folders

3. Engineer salary should be applicable to Engineer and Engineer 2
4. Position will be represented by Position class and we will compare and match only the first word
5. The position class will implement a comparator method

Expected Result

1. The expected result is the following: