Berkeley DB is a database engine that provides developers with fast, reliable, local persistence with zero administration. Berkeley DB is a library that links directly into your application. Your application makes simple function calls, rather than sending messages to a remote server, eliminating the performance penalty of client-server architectures. Berkeley DB stores data in application native format, as simple key/value pairs, eliminating the need for translation or mapping. Berkeley DB eliminates the overhead of SQL query processing, enabling applications with predictable access patterns to run faster.