Richard Jones of Last.fm has compiled an excellent list of key-value stores in Anti-RDBMS: A list of key-value stores.
In this post, Richard looks at Project Voldemort, Ringo, Scalaris, Kai, Dynomite, MemcacheDB, ThruDB, CouchDB, Cassandra, HBase and Hypertable. His conclusion for Last.fm use is that Project Voldemort has the most promise with Scalaris being a close second and Dynomite is also interesting.
–jrh
James Hamilton, Amazon Web Services
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