User Profile store, Server side cookie store, Recommendation
engines or any App requiring balanced read/writes with
sub-millisecond latency and very high throughput.
For session management as a server side cookie store or user
profile store. As an in-memory database or persistent cache,
replacing Memcached / MySQL. By recommendation engines running
similarity metrics on current context, matching recent behavior,
finding users close by or who have recently played a particular set
of games.