What are some examples of cache invalidation?

What are some examples of cache invalidation?

Cache invalidation is crucial for ensuring that users see the most up-to-date data. Some examples include: 1. Time-based expiration, where cached data is invalidated after a set period. 2. Manual invalidation, where an admin clears the cache after updates. 3. Event-based invalidation, where changes in the database trigger cache updates.

Can you explain time-based expiration in more detail?

Sure! Time-based expiration involves setting a specific time limit for how long cached data is considered valid. After this time elapses, the cache is automatically invalidated, and the next request for that data will fetch a fresh copy from the source.

What are the pros and cons of using manual invalidation?

Manual invalidation gives you precise control over when the cache is cleared, ensuring users see the latest data. However, it can be error-prone and may lead to stale data if not managed properly.

Are there any best practices for cache invalidation?

Yes, some best practices include: using a combination of strategies (like time-based and event-based), monitoring cache hit rates, and ensuring that your cache invalidation logic is well-documented and tested.