The article argues against the necessity of incorporating a caching layer such as Redis when using MongoDB. It explains that caches were originally designed to alleviate the performance issues associated with relational databases, primarily due to expensive join operations. However, MongoDB's document-oriented structure inherently facilitates faster data access, rendering additional caching layers unnecessary. The author encourages developers to simplify their architecture by removing such layers unless they can clearly articulate a justified need for them in the context of their application.
A caching layer is typically added to improve data access speeds; however, with MongoDB's design, such a layer often introduces unnecessary complexity rather than genuine benefits.
Caches like Memcached and Redis were made to solve the slow interaction with relational databases, but MongoDB's document model naturally minimizes the need for such layers.
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