Hadoop Mapreduce日志-文件与HDFS

我提交了一个mapreduce，这是我的输出

下面给出的文件和HDFS之间的区别是什么

16/01/07 21:49:58 INFO mapreduce.Job: Counters: 38
    File System Counters
        FILE: Number of bytes read=4011012
        FILE: Number of bytes written=8400605
        FILE: Number of read operations=0
        FILE: Number of large read operations=0
        FILE: Number of write operations=0
        HDFS: Number of bytes read=11928267
        HDFS: Number of bytes written=883509
        HDFS: Number of read operations=37
        HDFS: Number of large read operations=0
        HDFS: Number of write operations=6

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文件-给出对中间文件执行的I/O量，中间文件在映射和缩减阶段（排序和洗牌阶段）之间进行内部维护

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HDFS—映射程序读取的数据量和reducer写入的数据量。

文件—给出在映射和reduce阶段（排序和洗牌阶段）之间内部维护的中间文件上执行的I/O量

HDFS—映射器读取的数据量和reducer写入的数据量