hadoop-common-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From unmesha sreeveni <unmeshab...@gmail.com>
Subject Re: which is better : form reducer or Driver
Date Wed, 06 Nov 2013 02:59:17 GMT
i am dealing with multiple mappers and 1 reducer. so which is best?


On Tue, Nov 5, 2013 at 6:28 PM, Chris Mawata <chris.mawata@gmail.com> wrote:

>  If you have multiple reducers you are doing it in parallel while in the
> driver it is surely single threaded so my bet would be on the reducers.
>
> Chris
>
>
> On 11/5/2013 6:15 AM, unmesha sreeveni wrote:
>
>  I am emiting 'A' value and 'B' value from reducer.
>
>  I need to do further calculations also.
> which is a better way?
>  1. Do all remamining computations within reducer , after emiting
> or
> 2.Do remaining computation In driver: read A and B value from part file
> and do further computations.
>
>  Pls suggest a better way.
>
>  --
> *Thanks & Regards*
>
>  Unmesha Sreeveni U.B
>
> *Junior Developer *
>
> *Amrita Center For Cyber Security *
>
>
> * Amritapuri. www.amrita.edu/cyber/ <http://www.amrita.edu/cyber/> *
>
>
>


-- 
*Thanks & Regards*

Unmesha Sreeveni U.B

*Junior Developer*

*Amrita Center For Cyber Security*


* Amritapuri.www.amrita.edu/cyber/ <http://www.amrita.edu/cyber/>*

Mime
View raw message