Hadoop官方grep用例

2019-09-15 1,665 阅读1分钟

切换到Hadoop目录下
```
cd /opt/module/hadoop-2.7.2
```
创建input目录
```
mkdir input
```
将ect/hadoop下的xml文件拷贝到input目录下
```
cp etc/hadoop/*.xml input/
```

执行share目录下的MapReduce程序

bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.2.jar grep input output 'dfs[a-z.]+'

查看输出结果
```
cat output/*
```