This is Part 7 of my "From One User to One Million" series, where we'll build an understanding of System Design by following a simple application as it grows from a single user to millions. Instead of memorising technologies, we'll learn why they exist by solving real problems as they appear. L...
Source: [Dev.to](https://dev.to/aditya_d_sharma/fast-but-wrong-meet-cache-invalidation-43np)