Daily Term: Cache Invalidation

Cache Invalidation

Cache Invalidation is the process of removing or updating outdated data in a cache to ensure users receive fresh information. For example, if a product price changes in a database, the cached price must be invalidated or updated. Common strategies include time-based expiration (TTL), write-through caching, or manual invalidation. Cache invalidation is critical for data consistency but can be challenging, as premature or delayed invalidation can lead to stale data or performance hits.

Date: 2025-07-23