hadoop reduce task文件的相关内容

Hadoop中reduce task启动一些数据copy线程，通过什么获取map task输出文件？

Hadoop中通过ToolRunner和Configured实现直接读取命令行动态出入reduce task数量，jar文件等

一个典型的实现Tool的程序： /** MyApp 需要从命令行读取参数，用户输入命令如， $bin/hadoop jar MyApp.jar -archives test.tgz arg1 arg2 -archives 为hadoop通用参数，arg1 ,arg2为job的参数 */ ...

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更新时间 2023-04-13 10:06:58

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