When it comes to applying caching to applications, you want to add a cache engine layer between your application servers and the database. The app caching pattern allows you to reduce the load on the database as the most frequent query is served from the caching layer. The app caching pattern improves overall application and database performance. As shown in the following diagram, you can see the caching layer applied between the application layer and the database layer:
As shown in the preceding diagram, based on your data access pattern, you can use either lazy caching or write-through. In lazy caching, the cache engine checks whether the data is in the cache and, if not, gets it from the database and keeps it in the cache to serve future requests. Lazy caching is also called the cache aside pattern.
In the write-through method, data is written in the cache and in the data store at the same time. If the data gets lost from...