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https://issues.apache.org/jira/browse/MAPREDUCE-1126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12829266#action_12829266
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Jay Booth commented on MAPREDUCE-1126:
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Yeah, I'm definitely not a stakeholder in this issue or in low-level mapreduce
in general, but was just saying if we're throwing around the idea of an
entirely new underlying API anyways, maybe now would be the time to consider
that -- it'd be pretty simple to wrap the existing API around the concept if it
were baked into the lower-level API, but it'd be harder to add the concept to
the lower-level API once it's already solidified.
Either way, I don't have the mojo to make a big push for it, was just throwing
the idea out there if it's decided to go forward with a different underlying
API.
> 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, 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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