Datanode AMI ID: ami-0c481f8ab5632701f - Image Name: Datanode-image
Namenode AMI ID: ami-0c27685906c173598 - Image Name: Namenode-image

Steps to run the program:

1. Create one instance from Namenode image and 3 instances from Datanode image.
   On Name node:
2. Upload your key to folder ~/.ssh/key.pem
3. Create ~/.ssh/config file with following content (Remove if already exist):
   Host namenode
   HostName
   User ec2-user
   IdentityFile ~/.ssh/key.pem
   Host datanode1
   HostName
   User ec2-user
   IdentityFile ~/.ssh/key.pem
   Host datanode2
   HostName
   User ec2-user
   IdentityFile ~/.ssh/key.pem
   Host datanode3
   HostName
   User ec2-user
   IdentityFile ~/.ssh/key.pem
4. Run following two commands to resolve permissions:
   chmod 400 ~/.ssh/key.pem
   chmod 400 ~/.ssh/config
5. Run following commands to transfer files to datanodes (If files exist on datanodes, you will have to login to each node and delete them):
   scp ~/.ssh/key.pem ~/.ssh/config datanode1:~/.ssh
   scp ~/.ssh/key.pem ~/.ssh/config datanode2:~/.ssh
   scp ~/.ssh/key.pem ~/.ssh/config datanode3:~/.ssh
6. Run the following commands to start Hadoop.
   $HADOOP_HOME/sbin/start-all.sh
7. Run following commands to delete previous results if exist and disable safe mode:
   hadoop dfsadmin -safemode leave
   hdfs dfs -rm /result/*
   hdfs dfs -rmdir /result
8. Upload resume_dataset.csv, ResumeRecommender.jar, input.txt to ~ folder. (We have provided necessary java file to create jar)
9. Use below command to move resume_dataset to hdfs if not exist:
   hdfs dfs -copyFromLocal /home/ec2-user/resume_dataset.csv /ResumeRecommenderinput
10. Run below command to run the program from ~ directory:
    hadoop jar ResumeRecommender.jar ResumeRecommender /ResumeRecommenderinput/resume_dataset.csv /result input.txt
    (The last line of this command will show duration in miliseconds, the program took to execute.)
11. To see the output:
    hdfs dfs -cat /result/*
    (Before re-running the code, execute step-7)