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.maw...@gmail.com
<mailto:chris.maw...@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/>
/
