Podcast Episodes
Back to SearchEpisode 23: The Traffic Cop Who Keeps Websites From Crashing
Mia and Leo explain load balancers through a supermarket attendant directing shoppers to the shortest checkout line: round robin, least connections, …
18 hours ago
Episode 22: One Super Checkout Lane or Ten Ordinary Ones?
Mia and Leo explain scaling up vs scaling out through supermarket checkout lanes: why one bigger computer hits a ceiling and a single point of failur…
1 day, 18 hours ago
Episode 21: The Shipping Container That Fixed 'It Works on My Machine'
Mia and Leo explain containers and Docker through the shipping container: why apps break when they move between computers, how a container packs code…
2 days, 18 hours ago
Episode 20: The Cloud Is Just Someone Else's Computer
Mia and Leo explain cloud computing through a rented workshop: why apps like Netflix and Spotify run on someone else's computers, how companies rent …
3 days, 18 hours ago
Episode 19: Why Your Bank and Instagram Don't Use the Same Database
Mia and Leo compare SQL and NoSQL databases through a filing cabinet with fixed drawers versus flexible labeled bins. Schemas, document stores like M…
4 days, 18 hours ago
Episode 18: How Every App Asks Its Database a Question
Mia and Leo teach SQL — Structured Query Language — through a librarian who follows precise instructions. Select, filter, sort, and join: how apps as…
5 days, 18 hours ago
Episode 17: The Library That Never Forgets
Mia and Leo open the doors on databases — software's long-term memory. Tables, rows, columns, and indexes explained through a library filing system, …
6 days, 18 hours ago
Episode 16: Why a Video From Tokyo Loads Instantly in Dallas
Mia and Leo explain content delivery networks (CDNs) through neighborhood warehouses: edge servers, origin servers, latency, caching at global scale,…
1 week ago
Episode 15: Why Your Apps Keep a Spare Copy of Everything
Mia and Leo explain caching through a kitchen counter versus pantry: browser cache, memory cache, stale data, cache expiration and invalidation, and …
1 week, 1 day ago
Episode 14: How Websites Remember You When They Have No Memory
Mia and Leo explain cookies, sessions, and logins through a coat-check ticket: how a tiny cookie lets a forgetful website remember you, why logging o…
1 week, 2 days ago