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From "Ashish Venugopal" <...@andrew.cmu.edu>
Subject Re: Hadoop Profiling!
Date Wed, 08 Oct 2008 19:13:03 GMT
Are you interested in simply profiling your own code (in which case you can
clearly use what ever java profiler you want), or your construction of the
MapReduce job, ie  how much time is being spent in the Map vs the sort vs
the shuffle vs the Reduce. I am not aware of a good solution to the second
problem, can anyone comment?


On Wed, Oct 8, 2008 at 12:06 PM, Stefan Groschupf <sg@101tec.com> wrote:

> Just run your map reduce job local and connect your profiler. I use
> yourkit.
> Works great!
> You can profile your map reduce job running the job in local mode as ant
> other java app as well.
> However we also profiled in a grid. You just need to install the yourkit
> agent into the jvm of the node you want to profile and than you connect to
> the node when the job runs.
> However you need to time things well, since the task jvm is shutdown as
> soon your job is done.
> Stefan
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 101tec Inc., Menlo Park, California
> web:  http://www.101tec.com
> blog: http://www.find23.net
> On Oct 8, 2008, at 11:27 AM, Gerardo Velez wrote:
>  Hi!
>> I've developed a Map/Reduce algorithm to analyze some logs from web
>> application.
>> So basically, we are ready to start QA test phase, so now, I would like to
>> now how efficient is my application
>> from performance point of view.
>> So is there any procedure I could use to do some profiling?
>> Basically I need basi data, like time excecution or code bottlenecks.
>> Thanks in advance.
>> -- Gerardo Velez

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