Essay About Hadoop Cluster And Hadoop User

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hadoop installsteps and nececry files for installing hadoop + yarn 2.6 on ubuntu 14.10 (from
* tar -xzf jdk-7u75-linux-x64.tar.gz* ln -s /usr/local/jdk-7u75-linux-x64 /usr/local/jdk## edit /etc/profile for master(:setw synchronize-panes in tmux worked for me)* sudo vi /etc/profile  * add following lines“`sh  export HADOOP_HOME=/usr/local/hadoop  export PATH=$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH  export JAVA_HOME=/usr/local/jdk  export CLASSPATH=$JAVA_HOME/lib/tools.jar  export PATH=$JAVA_HOME/bin:$PATHsource /etc/profilejava -version ( to test)on slavessudo scp hduser@pocoyo-1:/etc/profile /etc/profilesource /etc/profile##config hadoop xml files.modify $HADOOP_HOME/etc/hadoop/hadoop-env.sh for all machines addexport JAVA_HOME=/usr/local/jdkmodify $HADOOP_HOME/etc/hadoop/slaves for all machinesadd  pocoyo-1  pocoyo-2  pocoyo-3copy xml files firstcd $HADOOP_HOMEcp ./share/doc/hadoop/hadoop-project-dist/hadoop-common/core-default.xml ./etc/hadoop/core-site.xmlcp ./share/doc/hadoop/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml ./etc/hadoop/hdfs-site.xmlcp ./share/doc/hadoop/hadoop-yarn/hadoop-yarn-common/yarn-default.xml ./etc/hadoop/yarn-site.xmlcp ./share/doc/hadoop/hadoop-mapreduce-client/hadoop-mapreduce-client-core/mapred-default.xml ./etc/hadoop/mapred-site.xmlmodify core-site.xmlpropertyvaluemachinesfs.defaultFShdfs://pocoyo-1:9000allhadoop.tmp.dir/usr/local/hadoop/tmpallio.file.buffer.size131072allmodify hdfs-site.xmlpropertyvaluemachinesdfs.namenode.rpc-addresspocoyo-1:9001alldfs.namenode.secondary.http-addresspocoyo-2:50090namenode and seconday nameNodedfs.namenode.name.dir/usr/local/hadoop/dfs/namenamenode and seconday nameNodedfs.datanode.data.dir/usr/local/hadoop/datadatanodesmodify mapred-site.xml