修改namenode上的hdfs-site.xml

configuration>

  <property>

    <name>dfs.replication</name>

    <value>2</value>

  </property>

  <property>

   <name>dfs.http.address</name>

   <value>www.node1.com:50070</value>

  </property>

  <property>

   <name>dfs.secondary.http.address</name>

   <value>www.node2.com:50090</value>

  </property>

</configuration