Uber’s CacheFront: Powering 40M Reads per Second with Significantly Reduced Latency

An architecture diagram illustrating the cache-aside pattern implemented in CacheFront

Uber developed an innovative caching solution, CacheFront, for its in-house distributed database, Docstore. CacheFront enables over 40M reads per second from online storage and achieves substantial performance improvements, including a 75% reduction in P75 latency and over 67% reduction in P99.9 latency, demonstrating its effectiveness in enhancing system efficiency and scalability.

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