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Hadoop >> mail # dev >> How Jobtracler stores tasktracker's information


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Re: How Jobtracler stores tasktracker's information
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.

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Bobby Evans

On 12/13/11 3:02 AM, "hadoop anis" <[EMAIL PROTECTED]> 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

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