Nice! I like learning about databases but got a bit of "framework fatigue" when I started reading about all the number of dbs available today (and deciphering marketing from tech notes).
This article hooked me with the comparison at the beginning.
I used to scoff at redis' single threaded design but it makes sense in a memory bound db. This article is a great example of taking that high-performance approach and designing parallelization around it. SO COOOL.
Also, it's SO interesting that here's yet another example of how performant the actor model can be. It's an old design (Communicating Sequential Processes was published in 1984!) but it works so well in our current hardware.
From a developer's perspective actors are very easy to reason about. I'm curious to try out Spacetime in a project now. Organizing server logic into databases, sub-databases, tables and reducers is intriguing.