Consistency

Oracle NoSQL Database provides several different consistency policies. At one end of the spectrum, applications can specify absolute consistency, which guarantees that all reads return the most recently written value for a designated key. At the other end of the spectrum, applications capable of tolerating inconsistent data can specify weak consistency, allowing the database to return a value efficiently even if it is not entirely up to date. In between these two extremes, applications can specify time-based consistency to constrain how old a record might be or version-based consistency to support both atomicity for read-modify-write operations and reads that are at least as recent as the specified version.

The following illustration depicts the range of consistency policies that can be used by an application that makes use of Oracle NoSQL Database:

Flexible consistency policies enables developers to easily create business solutions providing data guarantees while meeting application latency and scalability requirements.