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User_Movie_Rating_Hadoop_MapReduce

Big Data Management Project-User_Movie_Rating_Hadoop_MapReduce

Introduction:

This program summarize the intput.txt which contains rows of userId, movieId, rating, timestamp and format them into the key value pairs where key is the movie pairs and value is the array of User-Rating triples.

Here are one example:

Input format:

U1::M1::2::11111111

U2::M2::3::11111111

U2::M3::1::11111111

U3::M1::4::11111111

U4::M2::5::11111111

U5::M2::3::11111111

U5::M1::1::11111111

U5::M3::3::11111111

Output format:

(M1,M2) [(U5,1,3)]

(M2,M3) [(U5,3,3),(U2,3,1)]

(M1,M3) [(U5,1,3)]

Instruction:

Download the AssigOnez5223541.java and Hadoop-Core.jar.

cmd run javac -cp ".:Hadoop-Core.jar" AssigOnez5223541.java

cmd run java -cp ".:Hadoop-Core.jar" AssigOnez5223541 input.txt output

The output file will be contained in the directory output, there will be two directories out1 and out2. The final result is contained in out2.

Or you can directly download all the .class files representing all the classes contained in the file and then run java -cp ".:Hadoop-Core.jar" AssigOnez5223541 input.txt output