We store the vast majority of our data in Cassandra, which gives us tuneable consistency and high availability given its master-less architecture. Those propert

We store the vast majority of our data in Cassandra, which gives us tuneable consistency and high availability given its master-less architecture. Those properties suit the rest of our architecture perfectly, though there are of course trade offs involved. Each service then has its own keyspace and is unable to access the data of other services.