I have 4 db_users (on different oracle instances) and uses Ant to call 4
targets. So I call 4 times liquibase having for each a connection and
separate changesets files. As I manage scripts by versions (a folder by
version), i can easily see which changes are related.
Moreover I tag
each database at each version even if nothing has change for one of
them, so I can rollback to any version without error.