LinkedIn replaced its outdated FollowFeed system with FishDB, a new retrieval engine built in Rust. FishDB improves memory efficiency, reduces hardware usage, and enhances query capabilities, addressing the limitations of its predecessor. The article details the architecture, migration challenges, and the benefits of using Rust for performance.

Aurora DSQL represents a significant advancement in database engineering, focusing on scalability and efficiency by utilizing Rust for its development. The article discusses the journey of implementing DSQL, highlighting the challenges encountered in scaling writes and the architectural innovations introduced, such as the Crossbar and Adjudicator components. It emphasizes the importance of iterative development and collaboration with engineers to create a robust, serverless database solution.