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Posted to mapreduce-issues@hadoop.apache.org by "Owen O'Malley (JIRA)" <ji...@apache.org> on 2012/08/01 20:58:03 UTC

[jira] [Assigned] (MAPREDUCE-4505) Create a combiner bypass path for keys with a single value

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Owen O'Malley reassigned MAPREDUCE-4505:
----------------------------------------

    Assignee: Arun C Murthy
    
> 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
>            Assignee: Arun C Murthy
>
> 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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