CockroachDB is implemented on top of a key / value store. I don’t know too much about the internals, but a kv store with lots of degrees of consistency seems li

CockroachDB is implemented on top of a key / value store. I don’t know too much about the internals, but a kv store with lots of degrees of consistency seems like a good primitive to build more complex data stores on top. For instance, indexes could live as immediately consistent sharded keys, while data stays eventually consistent (or user configurable).