Introduction

Serving Data Fast: How to Read This Module

The storage module ended with a thought: a cache is just a tiny, short-lived read model. This module takes that thought seriously, because the cache is the most used, most misused, and most interview-asked piece of infrastructure in the industry.

The idea itself needs no introduction: keep the things you use often within arm's reach. Your kitchen does it (the counter, not the pantry), your brain does it, your CPU does it