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From Owen O'Malley <omal...@apache.org>
Subject Re: Measuring running times
Date Wed, 17 Mar 2010 15:45:48 GMT

On Mar 17, 2010, at 4:47 AM, Antonio D'Ettole wrote:

> Hi everybody,
> as part of my project work at school I'm running some Hadoop jobs on a
> cluster. I'd like to measure exactly how long each phase of the  
> process
> takes: mapping, shuffling (ideally divided in copying and sorting) and
> reducing.

Look at the job history logs. They break down the times for each task.  
You need to run a script to aggregate them. You can see an example of  
the aggregation on my petabyte sort description:


-- Owen

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