Consistency Availability Partition tolerance (CAP)

NoSQL technologies adhere to the “CAP” theorem, which says that in any distributed database, only two of the following properties can be guaranteed at once:

• Consistency: Every request receives the most recent result, or an error. (Note this is different than in ACID)
• Availability: Every request has a non-error result, regardless of how recent that result is.
• Partition tolerance: Any delays or losses between nodes will not interrupt the system’s operation.