Hi Pralabh * * 1.The Map input bytes couter belongs to the MapReduce FrameWork. The hadoop defintive explains that: The number of bytes of uncompressed input consumed by all the maps in the job. Incremented every time a record is read from a RecordReader and passed to the map’s map() method by the framework.
2.HDFS_BYTE_READ is the bulid in counter of the HDFS filesystem : The number of bytes read by each filesystem by map and reduce tasks.
2013/4/29 Pralabh Kumar <[EMAIL PROTECTED]>
> Hi > > What's the relationship between HDFS_BYTE_READ and Map input bytes counter > . Why can they be different for particular MR job. > > Thanks and Regards > >> Pralabh Kumar > > >
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