Redis 7 Internals Series
Recently I decided to have a look at Redis source code. At that time, I couldn’t think that it will get me hooked for a good couple of months, so I wasn’t really too much picky about choosing any specific version. I just cloned current dev branch. It’s stable — I mean, the code works, tests pass, but this is a work in progress: probably that’s the reason why the branch name is, uhm, “unstable”. However, everything covered here applies to Redis 7, except some lower-level details. More specifically, the commit I’m referring to throughout this series is ahead of Redis 7.0.X versions, and is part of recently released Redis 7.2.0 version. Oddly enough, there is no such thing as Redis 7.1.
My primary purpose is to give a higher-level overview of how Redis works — that’s I think the most important part when diving into a new codebase. Being a business applications developer by day, I had absolutely no idea how such kind of systems work internally. And that’s the overview that I personally wish I had when I started this endeavor.
Besides a higher-level overview, there are some parts that I’ve found particularly interesting. I’m describing those too. But there are way more interesting things that I’m not diving into here. However, having an overall picture, it won’t be much of a trouble to do oneself.
