所以，我来到了一个地方，我想把我存储在redis的数据分割成单独的数据库，因为我有时需要在一种特定的数据上使用键命令，并想把它分开，以使其更快。
If I segment into multiple databases, everything is still single threaded, and I still only get to use one core. If I just launch another instance of Redis on the same box, I get to use an extra core. On top of that, I can't name Redis databases, or give them any sort of more logical identifier. So, with all of that said, why/when would I ever want to use multiple Redis databases instead of just spinning up an extra instance of Redis for each extra database I want? And relatedly, why doesn't Redis try to utilize an extra core for each extra database I add? What's the advantage of being single threaded across databases?
