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From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (MAPREDUCE-1126) shuffle should use serialization to get comparator
Date Sat, 12 Dec 2009 02:22:18 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aaron Kimball reassigned MAPREDUCE-1126:
----------------------------------------

    Assignee: Aaron Kimball

> shuffle should use serialization to get comparator
> --------------------------------------------------
>
>                 Key: MAPREDUCE-1126
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1126
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: task
>            Reporter: Doug Cutting
>            Assignee: Aaron Kimball
>         Attachments: MAPREDUCE-1126.patch
>
>
> Currently the key comparator is defined as a Java class.  Instead we should use the Serialization
API to create key comparators.  This would permit, e.g., Avro-based comparators to be used,
permitting efficient sorting of complex data types without having to write a RawComparator
in Java.

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