In Part 1 of this series, we discussed what active-active databases are and identified some “good” reasons for considering them, primarily centered around extreme high availability and critical write availability during regional outages. Now, let’s turn our attention to the less compelling justifications and the substantial challenges that come with implementing such a setup.
This is a companion discussion topic for the original entry at https://percona.community/blog/2025/07/10/active-active-replication-the-hidden-costs-and-complexities