Caching is the process of temporarily storing data or files in an intermediary location between the requester and the permanent storage, for the purpose of making future requests faster and reducing network throughput. Caching increases the application speed and lowers the cost. It allows you to reuse previously retrieved data. To increase application performance, caching can be applied at various layers of the architecture such as the web layer, application layer, data layer, and network layer.
Normally, the server's random access memory (RAM) and in-memory cache engines are utilized to support application caching. However, if caching is coupled to a local server, then the cache will not be persisting data, in case of a server crash. Now, most of the applications are in a distributed environment, so it's better to have a dedicated caching layer that should be independent of the application life cycle. When you applied horizontal scaling to...