vi wordcount.txt
输入内容为:
- hello you
- hello me
- hello everyone
2) 建立目录
- hadoop fs -mkdir /data/wordcount
- hadoop fs -mkdir /output/
目录 / data/wordcount 用来存放 Hadoop 自带 WordCount 例子的数据文件, 运行这个 MapReduce 任务结果输出到 / output/wordcount 目录中.
3) 上传文件
hadoop fs -put wordcount.txt/data/wordcount/
4) 执行 wordcount 程序
hadoop jar usr/local/program/Hadoop-2.5.1/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.5.1.jar wordcount /data/wordcount /output/wordcount/
5) 查看结果
- hadoop fs -text /output/wordcount/part-r-00000
- [root@m1mydata]# hadoop fs -text /output/wordcount/part-r-00000
- everyone 1
- hello 3
- me 1
- you 1
来源: http://www.bubuko.com/infodetail-2846534.html