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Date: Thu, 11 Oct 2012 16:23:58 -0400
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Subject: Re: Force the number of map tasks in MR?
From: "Kevin O'dell" <kevin.odell@cloudera.com>
To: user@hbase.apache.org
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What are you max tasks set to?

On Thu, Oct 11, 2012 at 3:59 PM, Jean-Marc Spaggiari <
jean-marc@spaggiari.org> wrote:

> Hi,
>
> Is there a way to force the number of map tasks in a MR?
>
> I have a 25 regions table splitted over 6 nodes. But the MR is running
> the tasks only 2 by 2.
>
> Is there a way to force it to run one task on each regionserver
> serving at least one region? Why is the MR waiting for 2 taskes to
> complete before sending to the other tasks?
>
> I'm starting the MR with a caching of 100.
>
> I tried mapred.map.tasks and speculative=false with no success.
>
> Any idea how I can increase it this number of tasks?
>
> Thanks,
>
> JM
>


-- 
Kevin O'Dell
Customer Operations Engineer, Cloudera

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