Actually many NoSQL DBs are not just about relaxing ACID requirements, but also about limiting functionality for easier scaling via DHT. They only support key/v

Actually many NoSQL DBs are not just about relaxing ACID requirements, but also about limiting functionality for easier scaling via DHT. They only support key/value set/get and not range scan, which is needed to implement SQL semantics. I think the best interpretation for NoSQL so far is "Not only SQL", which has interface implication as well.