hadoop集群搭建（三）配置ubermo模式

一 停掉所有服务

[root@hadoop01 hadoop-2.7.1]# vim ./etc/hadoop/mapred-site.xml

<property>

<!–开启ubertask模式–>

       <name>mapreduce.job.ubertask.enable</name>

       <value>true</value>

  </property>

  <property>

       <name>mapreduce.job.ubertask.maxmaps</name>

       <value>9</value>

  </property>

  <property>

       <name>mapreduce.job.ubertask.maxreduces</name>

       <value>1</value>

  </property>

  <property>

       <name>mapreduce.job.ubertask.maxbytes</name>

       <value>102400000</value>

  </property>

二 发送到所有小弟，覆盖相应文件

[root@hadoop01 hadoop-2.7.1]# scp -r ./etc/hadoop/mapred-site.xml hadoop01:/usr/local/hadoop-2.7.1/etc/hadoop/

[root@hadoop01 hadoop-2.7.1]# scp -r ./etc/hadoop/mapred-site.xml hadoop02:/usr/local/hadoop-2.7.1/etc/hadoop/

[root@hadoop01 hadoop-2.7.1]# scp -r ./etc/hadoop/mapred-site.xml hadoop03:/usr/local/hadoop-2.7.1/etc/hadoop/

三、测试

[root@hadoop01 hadoop-2.7.1]# yarn jar ./share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.1.jar wordcount /mapred-root-historyserver-yang02.log /test/testout/02