FWIW, it's perfectly fine to backup both MariaDB and PostgreSQL by simply copying files. It's one of the recommended methods to set up PostgreSQL replicas: htt

FWIW, it's perfectly fine to backup both MariaDB and PostgreSQL by simply copying files. It's one of the recommended methods to set up PostgreSQL replicas: https://www.postgresql.org/docs/current/continuous-archiving.html#BACKUP-BASE-BACKUP https://www.postgresql.org/docs/current/continuous-archiving... (section 26.3.3.3) You might want to configure the database to put binary logs into a separate directory (or you might want to leave them there, depends on your requirements).