Cover photo by possessedphotography
In the previous post Why Websockets are Hard to Scale we’ve talked about the problems with scaling websockets and some of the existing solutions as well. The post mentioned using a load balancing technique called consistent hashing, which is a very elegant solution to this problem. I promised you for a post about how to implement scalable websocket server with consistent hashing.
Well, the day has come, take your coffee and follow along. Special thanks to ChatGPT, almost all of the code you will find in this post is written by ChatGPT. I only made some adjustments, so the code actually works.
The plan is to use code generated by ChatGPT, and do as little modifications as possible on it. If you’ve read the previous post I’m sure you have an outline of what we will do. But to remind you again here are steps for our implementation:
- Create a websocket server
- Create a hashring with server addresses, update when necessary
- Retrieve…