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From Robert Evans <ev...@yahoo-inc.com>
Subject Re: How Jobtracler stores tasktracker's information
Date Tue, 13 Dec 2011 15:23:39 GMT
I am not completely sure what you mean by this.  In Hadoop the TaskTracker will heartbeat into
the JobTracker to report its status and get new tasks to launch.  The Scheduler, which is
pluggable, then matches up requests for tasks with the TaskTracker.  If you want to see where
the matching up of tasks to task trackers takes place you should look at the schedulers. 
There are two main ones in use by hadoop.  They are the Capacity Scheduler and the Fair Scheduler.
 You should be able to find them under contrib.

Bobby Evans

On 12/13/11 3:02 AM, "hadoop anis" <hadoop.anis@gmail.com> wrote:

     Anyone please tell this,
      I want to know from where Jobtracker sends task(taskid) to
tasktarcker for scheduling.
      i.e where it creates taskid & tasktracker pairs

Thanks & Regards,

Mohmmadanis Moulavi

MTech (Computer Sci. & Engg.)
Walchand college of Engg. Sangli (M.S.) India

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