Posted as a quick note-to-self following a delay getting a database up and running for a rehash f an old Rails project.
After installing the mariadb package on Arch, the database needs to be initialised before starting,
# mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql
After this, the database server can be started with,
# systemctl start mysqld.service
(Still can’t say that I’m happy with systemd; I just can’t see what problem it’s trying to solve).
https://wiki.archlinux.org/index.php/MySQL provided the much-appreaciated help and guidance in this case.