• Python 2.7+
• Hadoop Framework
• JDK 7+
• SSH
• Git

1. Install Java
   • sudo apt-get update
   • sudo apt-get install default-jdk
2. Add User
   • sudo addgroup hadoop
   • sudo adduser --ingroup hadoop username
   • sudo adduser username sudo
3. Install And Config SSH
   • sudo apt-get install ssh
   • su username
   • ssh-keygen -t rsa -P ""
   • cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys
4. Install Hadoop
   • http://hadoop.apache.org/releases.html
   • Extract File (without Error !!)
   • sudo mv * /usr/local/hadoop
   • sudo chmod -R 777 /usr/local/hadoop
5. Setup Configuration Files
   • update-alternatives --config java
   • nano ~/.bashrc and append this items
     • export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
     • export HADOOP_INSTALL=/usr/local/hadoop
     • export PATH=$PATH:$HADOOP_INSTALL/bin
     • export PATH=$PATH:$HADOOP_INSTALL/sbin
     • export HADOOP_MAPRED_HOME=$HADOOP_INSTALL
     • export HADOOP_COMMON_HOME=$HADOOP_INSTALL
     • export HADOOP_HDFS_HOME=$HADOOP_INSTALL
     • export YARN_HOME=$HADOOP_INSTALL
     • export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native
     • export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib" and save file
   • source ~/.bashrc
   • nano /usr/local/hadoop/etc/hadoop/hadoop-env.sh append this line
     • export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
   • sudo mkdir -p /app/hadoop/tmp
   • sudo chown username:hadoop /app/hadoop/tmp
   • nano /usr/local/hadoop/etc/hadoop/core-site.xml enter the following in between the tag

     •   	<property>
         	<name>hadoop.tmp.dir</name>
         	<value>/app/hadoop/tmp</value>
         	<description>A base for other temporary directories.</description>
         	</property>
       
         	<property>
         	<name>fs.default.name</name>
         	<value>hdfs://localhost:54310</value>
         	<description>The name of the default file system.  A URI whose
         	scheme and authority determine the FileSystem implementation.  The
         	uri's scheme determines the config property (fs.SCHEME.impl) naming
         	the FileSystem implementation class.  The uri's authority is used to
         	determine the host, port, etc. for a filesystem.</description>
         	</property>
         	</configuration> ```
       

   • cp /usr/local/hadoop/etc/hadoop/mapred-site.xml.template /usr/local/hadoop/etc/hadoop/mapred-site.xml
   • nano /usr/local/hadoop/etc/hadoop/mapred-site.xml enter the following in between the tag

     •   <property>
         <name>mapred.job.tracker</name>
         <value>localhost:54311</value>
         <description>The host and port that the MapReduce job tracker runs
         at.  If "local", then jobs are run in-process as a single map
         and reduce task.
         </description>
         </property>
         </configuration> ```
       

   • sudo mkdir -p /usr/local/hadoop_store/hdfs/namenode
   • sudo mkdir -p /usr/local/hadoop_store/hdfs/datanode
   • sudo chown -R username:hadoop /usr/local/hadoop_store
   • nano /usr/local/hadoop/etc/hadoop/hdfs-site.xml enter the following in between the tag

     •   <property>
         <name>dfs.replication</name>
         <value>1</value>
         <description>Default block replication.
         The actual number of replications can be specified when the file is created.
         The default is used if replication is not specified in create time.
         </description>
         </property>
         <property>
         <name>dfs.namenode.name.dir</name>
         <value>file:/usr/local/hadoop_store/hdfs/namenode</value>
         </property>
         <property>
         <name>dfs.datanode.data.dir</name>
         <value>file:/usr/local/hadoop_store/hdfs/datanode</value>
         </property>
         </configuration>```
       

6. Start Hadoop
   • hadoop namenode -format
   • cd /usr/local/hadoop/sbin
   • start-all.sh
   • In Connection Refused Problems Check https://wiki.apache.org/hadoop/ConnectionRefused

• cd /home/username
• git clone https://github.com/sepandhaghighi/hadoop
• chmod -R 777 /home/username/hadoop

1. Add input to filesystem --> hadoop fs -put inputfile inputfile
2. Read output file --> hadoop fs -cat /output/part-00000
3. Copy output file --> hadoop fs -get /output/part-00000 /home/username/hadoop/output.txt
4. Remove output folder --> hadoop fs -rmr /output/

hadoop jar /usr/local/hadoop/share/hadoop/tools/lib/hadoop-streaming-2.8.0.jar -input input.txt -mapper /home/hduser/hadoop/mapper.py -reducer /home/hduser/hadoop/reducer.py -output /output

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Input.txt and output.txt in data folder

Input file

Output file

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