We're integrating Datastax Enterprise at GoGuardian. So far things have been great! I think the biggest win for us is their solr integration. Data written to Cassandra nodes automatically becomes available to search from solr nodes - No indexing pipeline needed. They also have an interesting hadoop layer which I haven't looked into.

Really looking forward to more from Datastax!

I understand that everyone wants to make oracle money, but cassandra isn't an alternative to oracle db, right?

Cassandra is a great write-only database.