You are viewing a plain text version of this content. The canonical link for it is here.

Posted to mapreduce-dev@hadoop.apache.org by "Adam Kramer (JIRA)" <ji...@apache.org> on 2010/05/03 05:19:55 UTC

[jira] Created: (MAPREDUCE-1750) Make #rows avail. to reducers as environment variable

Make #rows avail. to reducers as environment variable
-----------------------------------------------------

                 Key: MAPREDUCE-1750
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1750
             Project: Hadoop Map/Reduce
          Issue Type: Wish
            Reporter: Adam Kramer
            Priority: Minor


Given that there is a sort phase between the copy phase and the reduce phase, it seems like there is a chance for counting during sort.

It would be nice if my reducers could have access to an environment variable, say, mapred.reduce.rows, that contained the number of rows present for this reducer (as counted during the sort step).


-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.