Cache Invalidation
Cache invalidation is a process in computing where cached data is marked as outdated or removed to ensure that subsequent requests fetch fresh data from the original source, such as a database or API. It is a critical technique in system design to maintain data consistency and accuracy, preventing users from accessing stale information. This concept is widely applied in web development, distributed systems, and database management to optimize performance while balancing reliability.
Developers should learn cache invalidation to handle scenarios where cached data becomes obsolete due to updates, such as in e-commerce sites where product prices change, or social media platforms where new posts must appear immediately. It is essential for building scalable applications that require real-time data synchronization, as improper invalidation can lead to bugs, security issues, or poor user experiences. Mastering this skill helps in designing efficient caching strategies that reduce latency without compromising data integrity.