Shulou(Shulou.com)06/03 Report--

As soon as you stop all the services,

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

Mapreduce.job.ubertask.enable

True

Mapreduce.job.ubertask.maxmaps

nine

Mapreduce.job.ubertask.maxreduces

one

Mapreduce.job.ubertask.maxbytes

102400000

Send it to all the boys and overwrite the corresponding files.

[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/

III. Testing

[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

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