However one thing I like about Redis is that it can solve a lot of problems just adding it to your stack to do things that were too slow or impossible with your existing database. This way you start to take confidence with Redis in an incremental way, starting to use it just to optimize or to create new features in your application. This blog post explores a few use cases showing how people added Redis to existing environments to take advantage of Redis set of features. I’ll not report specific use cases with site names and exact configurations, I’ll just try to show you class of problems that Redis can solve without being your primary database.
[It’s the way I got Redis in the door with a team very wary (and weary) of adding anything to the stack.]