If I remember my RethinkDB history correctly, they picked the realtime web as their focus a while back.
Also, RethinkDB has kept their focus on real-time use cases since picking this focus.
Also, RethinkDB has kept their focus on real-time use cases since picking this focus.
I also heard that one of the initial "killer-features" of RethinkDB was supposed to be a stored history, just like a big persistent data structure (in my understanding, similar to Datomic). In the video[2] a lot of time was spent describing the benefits of an append-only structure.
[1]: https://www.youtube.com/watch?v=H9G1dCMTWps [2]: https://www.youtube.com/watch?v=uDHc3lkr3Ns
It still is that. And (now) more.
I don't think it was ever supposed to be a history-saving data structure -- that log-structured stuff is (I haven't watched the video, I'm assuming) about talking nice to SSD's. It was at one point, after that video, a single-machine memcache-compatible persistent key/value store, before the pivot to being clustered and having its own query API.