Recently I faced the need to move big databases hosted in MariaDB addon to another machine still in MariaDB addon.
Naive snapshot method doesn’t work because db become corrupted. Moreover making snapshot can be time consuming on slow machine with big databases.
From what I understand Mariabackup and restore can be supported, safe and fast. And can also be used to easily setup a replication between old and new machine to ensure a smoother decomissioning of old machine.
But, apparently, Mariabackup is not included in the addon. Would be nice to have it.