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From Nan Zhu <zhunans...@gmail.com>
Subject Re: response time measurement
Date Tue, 13 Nov 2012 00:41:39 GMT
There is no such a counter in default Hadoop implementation 

you can instrument your own code in JobInProgress.java to calculate it, 

there is also an implemented counter in JobInProgress, MAP_SLOTS_MILLS, considering both the
map tasks occupying multiple slots, but this value also increase when the task is failed,


Nan Zhu
School of Computer Science,
McGill University

On Monday, 12 November, 2012 at 6:14 PM, Samaneh Shokuhi wrote: 
> Hi,
> I need to do some experience on hadoop source code.
> i have modified part of it in MapTask.java class and need to compare the
> response time for mapper /job before and after modification .Is it
> reported somewhere to see that?
> Cheers,
> Samaneh

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