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From Arun C Murthy <...@hortonworks.com>
Subject Re: Information regarding completed MapTask
Date Tue, 27 Dec 2011 16:17:19 GMT
The reduces get it from the JobTracker. Take a look at TaskCompletionEvents.java.

Arun

On Dec 27, 2011, at 1:26 AM, hadoop anis wrote:

> 
> 
> Friends, 
> 
> I want to know where does information regarding completed MapTask get stored?
> i.e. how reduce task know about completed map output data is available on which tasktracker?
> what data structure gets maintained to track for the map output data?
> 
> If anyone know this please let me know. 
> 
> -- 
> Regards,
> 
> Anis
> Student MTech (Comp.Sci. & Engg) 
> 
> 
> 
> 
> 


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