cloudera 0.18 -> 0.20

• hadoop install

  $ sudo su -
  # apt-get install hadoop-0.18 hadoop-0.18-namenode  hadoop-conf-pseudo
  # apt-get install hadoop-0.18-datanode hadoop-0.18-jobtracker hadoop-0.18-tasktracker
  

• hadoop namenode format

  # su -s /bin/bash - hadoop -c 'hadoop namenode -format'
  

  • use instruction

    # su -s /bin/bash - hadoop -c " COMMAND "
    

• startup

  # /etc/init.d/hadoop-namenode start
  

• setup the conf files

...

(hadoop-env.sh, core-site.xml, hdfs-site.xml, mapred-site.xml)

....

• upgrade cloudera-hadoop-0.18 ---> official-hadoop 0.20

  # su -s /bin/bash - hadoop -c " /opt/hadoop/bin/hadoop namenode -upgrade "
  

image()?