hadoop学习（7）—— 使用yarn运行mapreduce一个简单的wordcount示例

/user
/{username}             --用户名
/mr                 --MapReduce类型应用
/wordcount      --应用的名称
/input      --要处理的文件
/output     --输出结果的文件夹

[root@hadoop-yarn hadoop-2.6.5]# bin/hdfs dfs -mkdir -p /user/root/mr/wordcount/input

cyhp supergroup
hadoop hello
hdfs hadoop
mapreduce hadoop
world yarn

[root@hadoop-yarn hadoop-2.6.5]# bin/hdfs dfs -put test-datas/wc.input  /user/root/mr/wordcount/input/

[root@hadoop-yarn hadoop-2.6.5]# bin/yarn jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.5.jar wordcount /user/root/mr/wordcount/input/ /user/root/mr/wordcount/output/

[root@hadoop-yarn hadoop-2.6.5]# bin/hdfs dfs -text /user/root/mr/wordcount/output/par*

[root@hadoop-yarn hadoop-2.6.5]# bin/hdfs dfs -text /user/root/mr/wordcount/output/par*
cyhp    1
hadoop  3
hdfs    1
hello   1
mapreduce   1
supergroup  1
world   1
yarn    1