The DBacesslayer aka DBSlayer aka Släyer is a lightweight database abstraction layer suitable for high-load websites where you need the scalable advantages of connection pooling. Written in C for speed, DBSlayer talks to clients via JSON over HTTP
R. Krummenacher, B. Norton, and A. Marte. Future Internet -- FIS 2010: Third Future Internet Symposium, Berlin, Germany, volume 6369 of Lecture Notes in Computer Science, Springer, Berlin, (2010)