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Posted to general@hadoop.apache.org by lei liu <li...@gmail.com> on 2011/01/18 04:04:48 UTC
how to know which partition data the reduce receive
There is job that has three reduce tasks that is the map output data
are divided
into three partition, how can I know every reduce receive which partition？
Re: how to know which partition data the reduce receive
Posted by Harsh J <qw...@gmail.com>.
The emitted Partition Number == Reducers' ID.
2011/1/18 lei liu <li...@gmail.com>:
> There is job that has three reduce tasks that is the map output data
> are divided
> into three partition, how can I know every reduce receive which partition？
>
--
Harsh J
www.harshj.com