How do I implement cache invalidation strategies?

How do I implement cache invalidation strategies?

Cache invalidation strategies are crucial for ensuring that your application serves up-to-date data. There are several strategies you can use, such as time-based expiration, event-based invalidation, and manual invalidation. Which one are you interested in?

Can you explain time-based expiration?

Sure! Time-based expiration involves setting a specific time after which the cached data is considered stale and is removed or refreshed. This is often implemented using a TTL (Time To Live) value. Would you like to know how to set this up in a specific programming language?

Yes, I'm using Node.js. How can I implement TTL?

In Node.js, you can use libraries like node-cache or redis for caching. For example, with node-cache, you can set a TTL when you store a value like this: cache.set('key', 'value', 10000); where 10000 is the TTL in milliseconds. Would you like more details on using Redis?

Yes, please provide an example using Redis.

In Redis, you can set a key with an expiration time using the SET command with the EX option. For example: SET mykey myvalue EX 10 will set mykey to expire in 10 seconds. Would you like to know more about handling cache misses?