Challenges of running caching in production environment: cache avalanche and penetration, traffic patterns, cold start, and consistency challenges.

Franco Fernando is a software engineer and technology enthusiast known for his expertise in web development and mobile applications. Readers can learn about coding best practices, software architecture patterns, and emerging technologies. With articles, tutorials, and code samples, Franco Fernando shares  insights and expertise for building modern and scalable software solutions.

The Polymathic Engineer

Explores production challenges when running distributed caches, including cache avalanche (simultaneous expiration causing database overload), thundering herd (multiple clients rebuilding same cache entry), cache penetration (requests for non-existent data), hot key problems (uneven traffic distribution), large key issues (oversized cache entries), cold start scenarios (empty cache after restart), and consistency challenges between cache and database. Provides practical solutions like staggered expiration, request coalescing, bloom filters, cache warming, and TTL-based safety nets.

Caching in Distributed Systems - Part III