CAP Theorem
- P must be chosen since we cannot guarantee the stability of network
Consistency (Data Consistency)
- Data throughout the system is same.. when accuracy is highest importance
- Must return same Data, regardless to from which node is it coming
- Example: banking, high stakes transactions, online deposit to checking account
- Strict vs Eventual Consistency
Availability (Node Availability)
- Node should respond (must be available).
Partition Tolerance (Cluster Availability)
- Cluster should respond (must be available), even if there is a a partition (i.e. network failure) between nodes.
NoSQL Databases
References
