Last week I have a chance to perform Redis cluster migration. Our Redis cluster contains 6 high memory VMs. At peak, it has 800 request/second. In this article I would like to explain how we migrate Redis cluster with zero downtime as well as lesson learned I’ve gathered.

I wrote this article for my own documentation related to lesson learned I was gathered during my coding-life. Really, up until now, coding is fun. The way we transfer our idea and logic into code so that computer can do whatever we want seems really magical. There’s a joke I’ve found somewhere (I forget exactly), today’s magician is programmer.