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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4505) Create a combiner bypass path for keys with a single value
Date Wed, 01 Aug 2012 18:58:02 GMT
Owen O'Malley created MAPREDUCE-4505:
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             Summary: Create a combiner bypass path for keys with a single value
                 Key: MAPREDUCE-4505
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4505
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: performance, task
            Reporter: Owen O'Malley


It would help optimize a lot of cases where there aren't a lot of replicated keys if the framework
would bypass the deserialize/combiner/serialize step for keys that only have a single value.

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