Hi Oliver,
yes you can control number of tasks per tasktracker by
mapred.tasktracker.{map|reduce}.tasks.maximum.
in your case
1. you might not have restarted the cluster after changing hadoop conf xml.
2. your input data might be very less (only one data block might be there)
therefore only one map task is launched.
On Fri, Sep 25, 2009 at 3:18 PM, Oliver Senn <[email protected]> wrote:
> Hi all,
>
> I'm wondering whether it's possible to limit the number of task that are
> executed in parallel on a task tracker?
>
> I'm using the parameters mapred.tasktracker.{map|reduce}.tasks.maximum
> to limit the number of maps and reduces per task tracker but still one map
> and one reduce are scheduled on the same task tracker.
>
> Thanks.
>
> Oliver
>
--
Thanks & Regards,
Chandra Prakash Bhagtani,
