Cassandra 0.6 has basic Hadoop map/reduce support (see CASSANDRA-342). You 
could also look at the example in contrib/word_count.

--Roger Schildmeijer
On 4 mar 2010, at 18.00em, Matthew Chambers wrote:

> Hi everyone, I've been tasked with researching noSQL databases for use at 
> Imageworks.  So far I've checked out Couch, HBase, and Cassandra.  One 
> question I have, and I've looked around for this but couldn't find anything, 
> does Cassandra have integrated map/reduce functionality or do you access data 
> purely by unique key?
> -Matt 

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