One or multiple databases per Docker container

Question

Let\'s say I have several different containers and each one of them uses it\'s own database. What is the best practice in this case regarding performance? Run one container, say

Answer 1

You'd want to use a single database server, preferably running a shell you can attach to for administration, sharing either a Unix socket, a port or both to linked containers. This means you'll have an easier time managing the database container as a service, tweaking performances, monitoring usage, backing up volumes, etc.

Granted, there might be non-standard situations where you might want to have independent servers, for instance running servers with isolated host resources, users, databases, though I'm certain this shouldn't apply to developer environments.