Glossary term
What is Hot key / hot spot? Meaning for developers
One key or shard getting far more traffic than others. Example: A celebrity's profile.
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.