Frequently Asked Questions on Consistency in DBMS
How does constraints helps in maintaining consistency?
Constraints enforces rules and validation that any data before insertion or updation will be checked if it adheres to these rules or not. Thereby, defining consistency & upholding data integrity.
What is eventual consistency?
Eventual consistency refers to the behaviour of data to be “eventually consistent” (after some time) across all the nodes in different region rather than immediately reflecting the newly made changes.
How is consistency managed across ACID and BASE based databases?
ACID based database are best utilised when your use case deals with real time data and any changes made, or newly inserted must be immediately reflected to the user, typically where there cannot be any room for error. ACID Properties provides atomicity, consistent state, Isolated execution and durable property for every transaction taking place in it, to maintain data integrity.
BASE based database are best utilised when our business use doesn’t involve updates to be reflected in all the nodes of our database immediately. Its main idea for consistency is: “Eventual consistency”, and not “immediate” .
What is Database Consistency?
Database consistency governs the most crucial aspects of the database, availability of correct information at the right time by the validation rules specified in the beginning is what decides the data integrity, and accuracy of the data stored.
In this article, we’ll be exploring consistency in the context of a relational database, why it’s crucial to be maintained, its real-world examples, and what features of an RDBMS help maintain a consistent database.