ok i will check them in both ways :)


On Wed, Nov 6, 2013 at 2:10 PM, Chris Mawata <chris.mawata@gmail.com> wrote:
Try it both ways and look at the numbers. Measurement is the ultimate way to get the answer.
My bet: The difference is so small I would worry about where if makes your code more maintainable than tuning before coding.
Chris

 

On 11/5/2013 9:59 PM, unmesha sreeveni wrote:
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




--
Thanks & Regards

Unmesha Sreeveni U.B
Junior Developer
Amrita Center For Cyber Security




--
Thanks & Regards

Unmesha Sreeveni U.B
Junior Developer
Amrita Center For Cyber Security
Amritapuri.

www.amrita.edu/cyber/