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 [b]hadoop02:/usr/local/hadoop-2.7.1/etc/hadoop/[/b]
[b][root@hadoop01 hadoop-2.7.1]# scp -r ./etc/hadoop/mapred-site.xml [b]hadoop03:/usr/local/hadoop-2.7.1/etc/hadoop/[/b][/b]

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