How does cache consistency affect database systems?

What is cache consistency and why is it important for database systems?

Cache consistency refers to the uniformity of data stored in cache and the underlying database. It's crucial because it ensures that all users see the same data at the same time, preventing issues like stale data or conflicts.

How does cache inconsistency occur in a database?

Cache inconsistency can occur due to various reasons, such as concurrent updates to the database, network delays, or failures in communication between the cache and the database.

What are some strategies to maintain cache consistency?

Common strategies include cache invalidation, where outdated cache entries are removed, and cache update, where the cache is updated immediately after a database change.

Can you give an example of a real-world application that faces cache consistency issues?

Sure! A social media platform often faces cache consistency issues when multiple users update their profiles simultaneously, leading to outdated information being displayed.