One of the most significant differences between the new generation of non-relational (AKA NoSQL) databases and the traditional RDBMS is the way in which consistency of data is handled. In a traditional RDBMS, all users see a consistent view of the data. Once a user commits a transaction, all subsequent ...
Voldemort is a distributed data store that is designed as a key-value store used by LinkedIn for high-scalability storage. It is neither an object database, nor a relational database. It does not try to satisfy arbitrary relations and the ACID properties, but is a big, distributed, fault-tolerant, persistent hash table.