hadoop集群搭建（三）配置ubermo模式
一 停掉所有服务# vim ./etc/hadoop/mapred-site.xml
mapreduce.job.ubertask.enable
true
mapreduce.job.ubertask.maxmaps
9
mapreduce.job.ubertask.maxreduces
1
mapreduce.job.ubertask.maxbytes
102400000
二 发送到所有小弟，覆盖相应文件
# scp -r ./etc/hadoop/mapred-site.xml hadoop01:/usr/local/hadoop-2.7.1/etc/hadoop/
# scp -r ./etc/hadoop/mapred-site.xml hadoop02:/usr/local/hadoop-2.7.1/etc/hadoop/
# scp -r ./etc/hadoop/mapred-site.xml hadoop03:/usr/local/hadoop-2.7.1/etc/hadoop/
三、测试
# yarn jar ./share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.1.jar wordcount /mapred-root-historyserver-yang02.log /test/testout/02
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