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Posted to mapreduce-dev@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2009/10/20 19:15:59 UTC
[jira] Created: (MAPREDUCE-1126) shuffle should use serialization
to get comparator
shuffle should use serialization to get comparator
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Key: MAPREDUCE-1126
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1126
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: task
Reporter: Doug Cutting
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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[jira] Reopened: (MAPREDUCE-1126) shuffle should use serialization
to get comparator
Posted by "Owen O'Malley (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAPREDUCE-1126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Owen O'Malley reopened MAPREDUCE-1126:
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-1 to this massive API change without much more dialog. The scope of the patch was much larger than the description.
> 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
> Fix For: 0.22.0
>
> Attachments: MAPREDUCE-1126.2.patch, MAPREDUCE-1126.3.patch, MAPREDUCE-1126.4.patch, MAPREDUCE-1126.5.patch, MAPREDUCE-1126.6.patch, 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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