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https://issues.apache.org/jira/browse/CASSANDRA-1821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12966878#action_12966878
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Stu Hood commented on CASSANDRA-1821:
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I would think that this would be better handled by their processing framework
(Pig, Hive), unless I'm misunderstanding your suggestion.
> Allow Map/Reduce functionality over multiple column families
> ------------------------------------------------------------
>
> Key: CASSANDRA-1821
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1821
> Project: Cassandra
> Issue Type: Improvement
> Components: Hadoop
> Reporter: Jeremy Hanna
>
> Currently, the ColumnFamilyRecordReader can only retrieve slice predicates
> from a single column family. With analytics, it's likely that people will
> want to map/reduce over multiple column families.
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