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From "Jim Challenger (JIRA)" <...@uima.apache.org>
Subject [jira] [Created] (UIMA-3664) DUCC RM - rounding error allocation shares
Date Mon, 03 Mar 2014 19:38:25 GMT
Jim Challenger created UIMA-3664:

             Summary: DUCC RM - rounding error allocation shares
                 Key: UIMA-3664
                 URL: https://issues.apache.org/jira/browse/UIMA-3664
             Project: UIMA
          Issue Type: Bug
          Components: DUCC
            Reporter: Jim Challenger
            Assignee: Jim Challenger
            Priority: Minor

During share counting on a cluster with a large spread of machine sizes (30G up to 256G),
and there are a lot of requests for 30G shares, but only a few for 45G shares, the current
code will make a rounding assumption that tends to starve the small, 45G job.

The code needs to change to round UP, not DOWN, if the math calculating qshares has a residual.

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