Mastering Python Design Patterns - Second Edition

Use cases

The Cache-Aside pattern is useful for data that doesn't change often, and for data storage that doesn't depend on the consistency of a set of entries in the storage (multiple keys). For example, it might work for certain kinds of document stores, where keys are never updated, and occasionally documents are deleted but there is no strong requirement to continue to serve them for some time (until the cache is refreshed).

Also, according to the documentation, we can find (from Microsoft), this pattern might not be suitable in the cases where the cached data set is static, or for caching session state information in a web application hosted in a web farm.