2008-11-04

• Devaraj Das 來訪
  • 09:30 - 10:30 拜會中心主任
  • 11:00 - 12:30 Public Talk Session: "Introduction to Hadoop and Cloud Computing" @ 北群多媒體
  • 14:00 - 17:00 Hands-on Labs (1): "Basics of DFS commands + How to develop MapReduce program using Hadoop?" @ 北群多媒體

• Hadoop Hands-on Labs (1)
  • download hadoop-0.18.2

    $ wget http://ftp.twaren.net/Unix/Web/apache/hadoop/core/hadoop-0.18.2/hadoop-0.18.2.tar.gz
    $ tar zxvf hadoop-0.18.2.tar.gz
    

  • [注意] 需要 JAVA_HOME 環境變數才能執行 hadoop namenode

    $ export JAVA_HOME=/usr/lib/jvm/java-6-sun
    $ cd hadoop-0.18.2
    ~/hadoop-0.18.2$ bin/hadoop namenode -format
    

  • 編輯 conf/hadoop-site.xml 在 configuration 那一段加入以下設定

    <configuration>
    <property>
      <name>fs.default.name</name>
      <value>localhost:5000</value>
     </property>
    </configuration>
    

  • 用 bin/hadoop namenode 啟動 namenode

    ~/hadoop-0.18.2$ bin/hadoop namenode 
    <ctrl-C> and come out
    $  bin/start-dfs.sh
    

  • ​http://localhost:50070/