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Hadoop, mail # dev - About MapReduce's Setup


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Re: About MapReduce's Setup
Hemanth Yamijala 2010-10-14, 04:38
If you are talking about the 'Setup task' that is used to initialize
or setup the job, yes, it can run on either the map slot or reduce
slot depending on what is available.

Thanks
Hemanth

On Thu, Oct 14, 2010 at 1:54 AM, He Chen <[EMAIL PROTECTED]> wrote:
> Hi, all
>
> I found out that if the there is no map slot, Hadoop will use reduce slot to
> setup mapreduce job when I submit a series of jobs.
>
> The first two jobs setuped themselves with a MapAttempt. However, they
> occupy all the map slots. When the third job comes, I find out it uses the
> ReduceAttempt to du the setup. After that, no more setup logged in the job
> history.
>
> Am I correct?
>
>
> Chen
>