hadoop运行简单例子--单词统计

前提是已经搭建好了Hadoop平台：如下









第一步：创建HDFS目录：

文件输入目录： hadoop fs -mkdir -p /csz/wordcount/input



第二步：新建数据文件：

myword

I thought a thought. But the thought I thought wasn't the thought I thought I thought. If the thought I thought I thought had been the thought I thought, I wouldn't have thought so much.



将文件遇到hdfs文件中：



运行wordcount程序：

./hadoop jar ../share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.3.jar wordcount /csz/wordcount/input /csz/wordcount/output





查看统计结果：