orient-db

Any Open Source software using Orient DB database? Have you any experiences with that database?

Do you know any open source software that uses Orient DB? Or have you used that product yourself? Any experiences to share? I have recently looked into Orient DB, and it has nice and interesting feature set (fast, embeddable in Java, simple API) but it seems that it is not widely used. Is it just because the Orient DB is a new player o...

NoSQL / RDBMS hybrid?

Is there a database out there that gives you the benefit of referential integrity and being able to use a SQL type language for querying, but also lets entities be loosely defined with respect to their data attributes and also the relationships between them? E.g. take a RBAC type model where you have Permissions, Users, User Groups & Ro...