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From Andrzej Bialecki ...@getopt.org>
Subject Re: Job scheduling (Re: Unable to run more than one job concurrently)
Date Fri, 19 May 2006 19:56:00 GMT
Paul Sutter wrote:
> priority vs pretend dates: whatever is most trivial, i'm in favor. we 
> could
> certainly use it today.
> delaying reducers: regardless of the bottleneck in the system, andrzej's
> problem was that reducers were sitting idle while the mappers of another
> task were running.

Exactly. There is no point in starting any reducers if we haven't even 
scheduled a single map task for the job. As soon as at least one map 
task is scheduled, I'm fine with starting reducers, I agree with 
arguments about network bottlenecks that Doug presented.

Best regards,
Andrzej Bialecki     <><
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