We have around 35tb MySQL deployment in master slave config. The most interesting nightmare happened to us when doing the master fail over using ghost and panic

We have around 35tb MySQL deployment in master slave config. The most interesting nightmare happened to us when doing the master fail over using ghost and panic manual intervention created 2 active master scenario leading to chaos which we had to clean for days along with monetary loss : ) Lesson learnt don't do manual intervention when ghost is doing fail over