What are some effective cache invalidation strategies?

What are some effective cache invalidation strategies?

Cache invalidation strategies are methods used to ensure that cached data is updated when the underlying data changes. Some effective strategies include time-based expiration, manual invalidation, and versioning.

Can you explain time-based expiration?

Time-based expiration involves setting a specific time after which cached data is considered stale and is automatically removed or refreshed. This helps ensure that users receive up-to-date information.

What about manual invalidation?

Manual invalidation requires developers to explicitly remove or update cached data when they know the underlying data has changed. This can be done through API calls or admin interfaces.

Are there any drawbacks to these strategies?

Yes, time-based expiration can lead to stale data if the timing isn't well-calibrated, while manual invalidation can be error-prone if not managed properly.