Glossary term
What is cache-aside (Cache-aside pattern)?
cache-aside stands for Cache-aside pattern.
In DevOps
Check the cache first; on a miss read the database, store the result with a TTL and return it.
Learn it properly · DevOpsLesson 16: Redis: Caching and SessionsFast in-memory storage for sessions, rate limits and hot data — and when not to reach for it.In System Design
App reads cache → on miss, loads DB and fills cache. Example: The most common caching pattern.
Learn it properly · System DesignLesson 16: Caching Part 2: Strategies, Eviction and InvalidationAdding a cache is easy; keeping it correct is hard. The six read/write strategies, why you delete rather than update on write, eviction policies you can try by hand, invalidation per data type, and the five ways caches cause outages.In Scenario Debugging
Check the cache first. If it is empty (a miss), load from the source and save it. A write removes or updates the saved entry.
Learn it properly · Scenario DebuggingLesson 2: “The UI Is Fast but the API Takes Too Long”: How to Solve ItFollow the request: DNS and TLS, cold starts, N+1 queries, missing indexes, slow calls to other services, big payloads and missing caches. Then the UX fixes while the backend is repaired.In Full-Stack Questions
A pattern where the app checks the cache first, and on a miss reads the database and stores the result in the cache.
Learn it properly · Full-Stack QuestionsLesson 18: Redis and Caching Interview QuestionsCache-aside and the other patterns, TTL and invalidation, stampedes, data types, persistence, eviction, rate limiting, locks and client settings that matter.