CUBRID

CUBRID (/ˈkjuːbrɪd/ "cube-rid") is an open source SQL-based relational database management system (RDBMS) with object extensions developed by Naver Corporation for web applications. The name CUBRID is a combination of the two words cube and bridge, cube standing for a sealed box that provides security for its contents while bridge standing for data bridge.

License policy

CUBRID has a separate license for its server engine and its interfaces. The server engine adopts the GPL v2.0 or later license, which allows distribution, modification, and acquisition of the source code. CUBRID APIs and GUI tools have the Berkeley Software Distribution license in which there is no obligation of opening derivative works. The reason of adopting two separate license systems is to provide complete freedom to Independent software vendors (ISV) to develop and distribute CUBRID-based applications.

Architecture

The feature that distinguishes CUBRID database from other relational database systems is its 3-tier client-server architecture which consists of the database server, the connection broker and the application layer.