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