Actually, we have a few examples of Cassandra being used here too: Buck uses it (http://facebook.github.io/buck/concept/buckconfig.html http://facebook.github.i

Actually, we have a few examples of Cassandra being used here too: Buck uses it (http://facebook.github.io/buck/concept/buckconfig.html http://facebook.github.io/buck/concept/buckconfig.html) and so do Instagram (http://planetcassandra.org/blog/post/instagram-making-the-switch-to-cassandra-from-redis-75-instasavings http://planetcassandra.org/blog/post/instagram-making-the-sw...) ... so as with all of these things, we evaluate options on a case-by-case basis.