You need to write your scripts map(key, value) -> (key', value') and reduce(). Program automatically will sort your data and make writing mapreducekakds
You can launch program as
./mapreduce -map "path_to_your_map_script" [files where to read from] [file were to write]
./mapreduce -reduce "path_to_your_reduce_script" [file where to read from] [file were to write]
./mapreduce -map ./word_count_map in1.txt in2.txt in3.txt out.txt
./mapreduce -reduce ./word_count_reduce out.txt dist.txt
