- 一般都用yarn 或者hadoop 很少用mapred
- [hadoop@hadoop001 hadoop-2.6.0-cdh5.7.0]$ yarn (查看yarn的命令帮助)
- [hadoop@hadoop001 hadoop-2.6.0-cdh5.7.0]$ find ./ -name “example.jar” (在当前目录下搜索jar的案例程序)
- [hadoop@hadoop001 hadoop-2.6.0-cdh5.7.0]$ hadoop jar ./share/hadoop/mapreduce2/hadoop-mapreduce-examples-2.6.0-cdh5.7.0.jar (一般提交不用mapred job提交,一般会用hadoop jar 或者yarn jar去提交)
- [hadoop@hadoop001 hadoop-2.6.0-cdh5.7.0]$ hadoop jar ./share/hadoop/mapreduce2/hadoop-mapreduce-examples-2.6.0-cdh5.7.0.jar wordcount /ruozedata /output1 (进行/ruozedata下文件的词频统计,将统计结果保存在/output1(根目录下的output1中))
- [hadoop@hadoop001 hadoop-2.6.0-cdh5.7.0]$ hdfs dfs -ls /output1 (查看output1下面的文件)
- [hadoop@hadoop001 hadoop-2.6.0-cdh5.7.0]$ hdfs dfs -cat /output2/part-r-00000 (查看part-r-00000文件)
- [hadoop@hadoop001 hadoop-2.6.0-cdh5.7.0]$ hdfs dfs -rm -r /output1 (删除分布式系统根目录下的output1文件夹)
- mapred job -list
-kill job-id
yarn application -kill Kills the application.
-list
yarn的常用命令
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转载自blog.csdn.net/qq_42694416/article/details/83999121
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