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Jerry Chen commented on MAPREDUCE-2454: --------------------------------------- Hi Asokan, Thank you for your work on this. I am following the whole thread and one of the thing that I feel interested in is pluggable sort in reduce side. While this was discussed and was in the intial patches. It seems to me that it is not in the final patch as I didn't see any interfaces mentioned above added or modified in reduce side. As my understanding is that the current sort in map reduce is participating by both Map and Reduce. Does replacing only map side make any sense? - Haifeng > Allow external sorter plugin for MR > ----------------------------------- > > Key: MAPREDUCE-2454 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-2454 > Project: Hadoop Map/Reduce > Issue Type: New Feature > Affects Versions: 2.0.0-alpha, 3.0.0, 2.0.2-alpha > Reporter: Mariappan Asokan > Assignee: Mariappan Asokan > Priority: Minor > Labels: features, performance, plugin, sort > Fix For: 3.0.0 > > Attachments: HadoopSortPlugin.pdf, HadoopSortPlugin.pdf, > KeyValueIterator.java, MapOutputSorterAbstract.java, MapOutputSorter.java, > mapreduce-2454-modified-code.patch, mapreduce-2454-modified-test.patch, > mapreduce-2454-new-test.patch, mapreduce-2454.patch, mapreduce-2454.patch, > mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, > mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, > mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, > mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, > mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, > mapreduce-2454.patch, mapreduce-2454.patch, mapreduce-2454.patch, > mapreduce-2454.patch, mapreduce-2454-protection-change.patch, > mr-2454-on-mr-279-build82.patch.gz, MR-2454-trunkPatchPreview.gz, > ReduceInputSorter.java > > > Define interfaces and some abstract classes in the Hadoop framework to > facilitate external sorter plugins both on the Map and Reduce sides. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira