Duplicate Elimination using The Two-Pass Multiway Merge Sort

Using jdk-11.0.11.9-hotspot

Folder Structure

• src: The folder to maintain sources.
• output: The sorted relation with distinct records is stored in this folder.
• input: Program looks for the specified relation in this folder.

Meanwhile, the compiled output files will be generated in the bin folder by default.

Execution Parameters

The execution parameters such as the available memeory size and command line arguments can be modified in the .vscode/launch.json.

Running the code

There are two primary ways in which we can run this program.

1. Simply use the `run java` button in vscode. This method will run the program according to the configurations specified in `.vscode/launch.json`.

2. Manual compilation of the src.
    > javac -d ./bin  src/*.java
    This will save the generated bin files in the `bin` directory.

    > java -classpath bin App fileSmall.txt
    Here, `fileSmall.txt` contains the input relation and is located in the `input` directory.

Note: All the input files are expected to be in the input directory. This behavior may later be changed to allow input files from any location.

Command Line Arguments

1. filename: The program expects the first command line argument to be the name of file containing the relation. This file must be located in the input directory.

2. v: Verbose. Optional argument to display all the duplicated records as they are found.