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From Rohan Rai <rohan....@inmobi.com>
Subject Re: JVM Reuse for parallel execution
Date Tue, 11 May 2010 14:02:50 GMT
Forgot to add, we are using the following configuration.

mapred.tasktracker.map.tasks.maximum as 4
and mapred.tasktracker.reduce.tasks.maximum as 3.


Rohan Rai wrote:
> Hi
> Is there a way of executing multiple tasks in parallel in a single JVM.
> For a particular job we see a child process being spawned for each
> task, despite
> mapred.job.reuse.jvm.num.tasks being set to -1
> In order to avoid the overhead of starting a JVM for each task and yet
> achieve
> parallel execution of tasks, wanted to know sharing the JVM is
> possible, for
> parallel task execution.
> Regards
> Rohan

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