True Vendor Independent Database Agnostic Expertise by Infrastucture Professionals for Industry Professionals. Started by 2 ex-MySQL and MariaDB consultants in 2017, Signal 18 Consulting brings you the best of the database and web infrastructure world. Our flagship software, Signal 18 Replication Manager offers high availability for your MySQL and MariaDB databases and interfaces seamlessly with industry-grade SQL proxies such as MariaDB MaxScale or ProxySQL.