How do I choose between using a cache and a database?

I'm trying to decide whether to use a cache or a database for my application. What should I consider?

You should consider factors like data access speed, data persistence, and the complexity of your queries. Caches are faster but temporary, while databases are slower but provide permanent storage.

What kind of data is best suited for caching?

Data that is frequently accessed and doesn't change often is ideal for caching. Examples include user sessions, product listings, and configuration settings.

Are there any downsides to using a cache?

Yes, caches can lead to stale data if not managed properly, and they require additional memory resources. It's important to implement cache invalidation strategies.

Can I use both a cache and a database together?

Absolutely! Many applications use both to optimize performance. You can cache frequently accessed data while storing everything else in a database.