Hi Bejoy,
It is possible to execute a job with no mappers and reducers alone.
You can try this by giving the empty directory as input for the job.
Devaraj K
_____
From: Bejoy KS [mailto:bejoy.had...@gmail.com]
Sent: Wednesday, September 07, 2011 1:30 PM
To: mapreduce-user@hadoop.apache.org
Subject: Re: No Mapper but Reducer
Thanks Sonal. I was just thinking of some weird design and wanted to make
sure whether there is a possibility like that- no maps and all reducers.
On Wed, Sep 7, 2011 at 1:22 PM, Sonal Goyal <sonalgoy...@gmail.com> wrote:
I dont think that is possible, can you explain in what scenario you want to
have no mappers, only reducers?
Best Regards,
Sonal
Crux: Reporting <https://github.com/sonalgoyal/crux> for HBase
Nube Technologies <http://www.nubetech.co>
<http://in.linkedin.com/in/sonalgoyal>
On Wed, Sep 7, 2011 at 1:18 PM, Bejoy KS <bejoy.had...@gmail.com> wrote:
Hi
I'm having a query here. Is it possible to have no mappers but
reducers alone? AFAIK If we need to avoid the tyriggering of reducers we can
set numReduceTasks to zero but such a setting on mapper wont work. So how
can it be achieved if possible?
Thank You
Regards
Bejoy.K.S
