"Berkeley DB is not exposed to the end-user. It is totally hidden below the SQLite APIs. It acts as the storage engine in place of SQLite's own BTREE. An application written to use the SQLite version 3 API can switch to Oracle Berkeley DB with no code changes, simply re-link against Berkeley DB."
Comments
Take a look at Oracle Berkeley DB:
"Berkeley DB is not exposed to the end-user. It is totally hidden below the SQLite APIs. It acts as the storage engine in place of SQLite's own BTREE. An application written to use the SQLite version 3 API can switch to Oracle Berkeley DB with no code changes, simply re-link against Berkeley DB."
http://www.oracle.com/technetwork/database/berkeleydb/overvi...
I haven't had time to read the full paper, but it looks very interesting.