I am looking for an eventually consistent data store and it looks like it may be coming down to Riak or Cassandra. Has anyone got expereinces of a view on this?
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As you probably know, they are both architecturally strongly influenced by Dynamo (eventually consistent, no single points of failure, etc). Both also go beyond Dynamo in providing a “richer than pure K/V” data model — in Cassandra’s case, providing a Bigtable-like ColumnFamily mode, in Riak’s, a Document-oriented one. I have seen sane people choose both.
I believe points that favor Cassandra include
Points that favor Riak include
/Cassandra dev, fwiw