The Key/Value Store becames more and more popular. When we use the Key/Value Store to store objects, we need to serialize/deserialize the objects as binary buffer. We have many ways to serialize/deserialize objects. A possible way is to use the Relational Database. Every value we store in the Key/Value Store is a SQLite instance. We can use the power of the Relational Database to manipulate the value. The SQL is very powerful for processing query request.

SPHiveDB = TokyoCabinet + SQLite
http://code.google.com/p/sphivedb/

SPHiveDB is a server for sqlite database. It use JSON-RPC over HTTP to expose a network interface to use SQLite database. It supports combining multiple SQLite databases into one file ( through tokyo cabinet ). It also supports the use of multiple files.