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From Naresh Rapolu <nareshreddy.rap...@gmail.com>
Subject Need help understanding the source
Date Sun, 05 Jul 2009 18:13:38 GMT


In  ReduceTask.java ,  MapOutputCopier# getMapOutput()   function.
What do the following variables contain.

long decompressedLength =
long compressedLength =

Can i get the number of  map output records  in this  copied file using any
of these variables ?? 
None of these seems to be a multiple of  Record<K,V>  size.  I understand
there might be some header information and checksum content inside these
length, but can any one let me know how should i subtract them to get the
aggregate  size of  map-output-records.

Naresh Rapolu.
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