However, I do use Redis for one thing: user sessions. I turned persistence off as Redis seems to be rock-stable, and I really don't need sessions to persist. I was using a modified version of Node's MemoryStore, to which I added clean garbage collection, but with often restarts I mentioned earlier it has become pain for users to have to login again when in the middle of the game. Having a separate, dedicated Redis instance to handle the sessions made restarts completely seamless, as the cookie sent by user's browser remains valid between node restarts.
I was not willing to learn new db technology, but there wasn't really much to learn with Redis. You can set it up in minutes and it just works(tm). I highly recommend you try it.
