What is the difference between hot cache and cold cache, and what are the features of their use?

Hot cache is a cache that has been recently used and is likely to contain up-to-date data, so access to it is very fast. It is usually stored in memory and quickly accessible.

Cold cache is a cache that has not been used for a long time or has just been created and is not yet filled with data. Access to it may be slower, as data might need to be loaded from slower sources.

Usage features:

• Hot cache provides quick data retrieval and improves performance.
• Cold cache requires time to fill, but over time it becomes hot.

For example, when an application starts, the cache may be cold, and the first requests will be slower, but then the cache warms up and speeds up the operation.