You might want to take a look at Lily; a document store that runs on HBase: [http://www.lilyproject.org/lily/index.html http://www.lilyproject.org/lily/index.ht

You might want to take a look at Lily; a document store that runs on HBase: [http://www.lilyproject.org/lily/index.html http://www.lilyproject.org/lily/index.html]. It exposes a REST interface to perform CRUD and search operations, and has a very expressive object model (including record-to-record links).