What is the Cache Aside Pattern

追加: 2026-05-05

[00:00:00]So, how does this actually work? Well, the most popular way is a pattern called cache aside. It's pretty simple. First, your app asks Redis for the data it needs. If Redis has it, that's a cache hit. It gets sent back instantly. Job done. If Redis doesn't have it, a cache miss, no problem. The app just goes and asks MySQL, gets the data, and before it sends it to the user, it saves a copy in Redis for the next time someone asks.

[00:00:22]And what kind of stuff is perfect for this? Pretty much anything that gets read a lot, but doesn't change every second. Think about user login information.