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Posted to mapreduce-user@hadoop.apache.org by Debbie Fu <fu...@gmail.com> on 2011/03/13 03:40:38 UTC

number of tasks assign per heartbeat

HI,
How many tasks would assign per TT heartbeat?  Is there a parameter for it
to configure in hadoop?

-- 
Best regards!

Re: number of tasks assign per heartbeat

Posted by Harsh J <qw...@gmail.com>.

Hello,

On Sun, Mar 13, 2011 at 8:10 AM, Debbie Fu <fu...@gmail.com> wrote:
> HI,
> How many tasks would assign per TT heartbeat?  Is there a parameter for it
> to configure in hadoop?

This is dependent on what scheduler you're using. Which one are you
using and (am curious) why do you seek this change? :)

The default JobQueueTaskScheduler shall assign multiple map-tasks and
a single reduce task per heartbeat. Does not have a property that can
control this behavior.

-- 
Harsh J
www.harshj.com