[Zope] Backing up a Zope instance with Relstorage / Mysql

Hi, We're setting a new Zope instance (2.10.7) using Relstorage (1.1.3) and MySql (5.0.77). We have 3 different mount points (main, Plone and temp) all pointing to different mysql databases. I can't find any instructions about backing up this type of environment. Can just we back databases up sequentially? thanks in advance Anthony