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From "Denny Ye (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-2393) No total min share limitation of all pools
Date Thu, 17 Mar 2011 05:48:29 GMT
No total min share limitation of all pools
------------------------------------------

                 Key: MAPREDUCE-2393
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2393
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: contrib/fair-share
    Affects Versions: 0.21.0
            Reporter: Denny Ye


hi, there is no limitation about min share of all pools with cluster total shares. User can
define arbitrary amount of min share for each pool. It has such description in <fair scheduler
design document>, but no regular code. 
It may critical for slot distribution. One pool can hold all cluster slots to meet it's min
share that greater than cluster total slots very much.
If that case has happened, we should scaled down proportionally.


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