Mapreduce ----完全分布式WorldCount 示例

1 建立项目

下载见附件:

https://download.csdn.net/upload/success

导出jar:

  HdfsDemo-1.0-SNAPSHOT.jar  

2 建立测试1.txt

hello
hello
world
hahah
how

上传到hadoop上:

hdfs dfs -mkdir -p /user/centos/wc/data

hdfs dfs -put 1.txt wc/data

3 测试脚本

 hadoop jar HdfsDemo-1.0-SNAPSHOT.jar com.it18zhang.hdfs.mr.WCApp hdfs://s200/user/centos/wc/data hdfs://s200/user/centos/wc/data/out

4 查看进度

http://192.168.77.200:8088/cluster/apps/RUNNING

5 查看深成统计文本

hdfs dfs -cat /user/centos/wc/data/out/part-r-00000

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转载自blog.csdn.net/ssllkkyyaa/article/details/83656605
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