Blackray – Open source database management systems

BlackRay is an open source fully relational database management systems designed to provide high performance for SQL queries features commonly associated with search engines.

It offers SQL support, JDBC and ODBC driver options, as well as sophisticated operational and management features.Load-balancing and operational stability by means of N+1 redundance are included. it also called "Data Engine" because it combines traditional relational database features with the power and flexibility of search engines.