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https://issues.apache.org/jira/browse/CASSANDRA-1473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13051231#comment-13051231
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Jonathan Ellis commented on CASSANDRA-1473:
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This is a Hadoop partitioner, not a Cassandra partitioner.
http://hadoop.apache.org/common/docs/r0.20.0/api/org/apache/hadoop/mapreduce/Partitioner.html
> Implement a Cassandra aware Hadoop mapreduce.Partitioner
> --------------------------------------------------------
>
> Key: CASSANDRA-1473
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1473
> Project: Cassandra
> Issue Type: Improvement
> Components: Hadoop
> Reporter: Stu Hood
> Assignee: Patricio Echague
> Fix For: 1.0
>
>
> When using a IPartitioner that does not sort data in byte order
> (RandomPartitioner for example) with Cassandra's Hadoop integration, Hadoop
> is unaware of the output order of the data.
> We can make Hadoop aware of the proper order of the output data by
> implementing Hadoop's mapreduce.Partitioner interface: then Hadoop will
> handle sorting all of the data according to Cassandra's IPartitioner, and the
> writing clients will be able to connect to smaller numbers of Cassandra nodes.
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