AWS Aurora, ElastiCache, and DynamoDB Patterns Explained for Cloud Engineers

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A developer transitioning from systems engineering to cloud and DevOps has published a detailed guide covering AWS database and caching services. The guide explains Aurora's dual-endpoint architecture, where a writer endpoint handles all write operations and a reader endpoint distributes read queries across replicas. It also covers ElastiCache caching strategies such as lazy loading and write-through, as well as cache invalidation concepts. DynamoDB topics include table creation, capacity modes, indexing with LSI and GSI, and the key difference between Query and Scan operations. The resource is structured to support both certification preparation and technical interview readiness.

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