PrimeBase XT (PBXT) transactional MySQL Storage Engine
By Mathieu CARBONNEAUX
PrimeBase XT is a transactional storage engine for MySQL 5.1 and higher.
It is a competitor to InnoDB among others…
It evolves very quickly, and recently added support for MySQL v6’s built-in online backup function.
http://blogs.mysql.com/peterg/2008/05/19/mysql-60-feature-2-online-backup/
http://www.primebase.org/documentation/index.php