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https://issues.apache.org/jira/browse/MAPREDUCE-1126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron Kimball updated MAPREDUCE-1126:
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Attachment: MAPREDUCE-1126.patch
Attaching a patch that makes this work. This depends on HADOOP-6438 which adds
the configuration getters/setters discussed earlier.
This patch adds the following new files:
{code}
svn add src/test/mapred/org/apache/hadoop/mapreduce/TestAvroSerialization.java
svn add src/test/mapred/org/apache/hadoop/mapreduce/avro/key.avsc
svn add src/test/mapred/org/apache/hadoop/mapreduce/avro/val.avsc
{code}
Tested by running Mapreduce unit tests; added new unit tests that use the Avro
serialization systems (generic, specific, and reflect) for intermediate data
types. Booted a pseudo-distributed cluster and ran some example jobs, which
work.
Will mark as patch-available after the dependencies are all met
> 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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