Distributed
← Caching

Lesson 04.4

Hot keys

A hot key receives far more traffic than other keys, overloading its single cache owner even when the cache cluster has spare capacity elsewhere.

🍪 The fast copy can be wrong

Ava and Ben are workers using the computer to manage featured cookie. Splitting lots of things between computers does not help when almost everyone asks for the same one.

In this lesson you'll

  1. 1Watch the fast copy answer a request
  2. 2Guess where the unsafe gap appears
  3. 3Change the rule and protect the source of truth