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https://issues.apache.org/jira/browse/CASSANDRA-1124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12871181#action_12871181
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Jonathan Ellis commented on CASSANDRA-1124:
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... which is not to discourage you from doing that, but more to say "realize
that to solve short-term goals you probably need to rely on what you can get
into Cassandra."
> Improve Cassandra to MapReduce locality sharing
> -----------------------------------------------
>
> Key: CASSANDRA-1124
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1124
> Project: Cassandra
> Issue Type: Improvement
> Components: Hadoop
> Reporter: Jeremy Hanna
> Priority: Minor
>
> Currently, the hadoop integration only passes the data's local node
> information (ColumnFamilyRecordReader-RowIterator-getLocation). Hadoop can
> take advantage of full locality and it's possible that we have full locality
> configured in Cassandra.
> So this improvement is for adding the full locality of the data into the
> String in a way that hadoop can make use of it with its Job/Task Trackers.
> This will allow for jobs to be potentially on the same rack and/or datacenter
> if possible.
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