Free
4h · 5 lessons
Overview
Each one worked end to end: requirements, estimates, the first diagram, the bottleneck that appears at scale, and the two or three deep dives an interviewer will push you into.
This module is 07.2 of the 6 in Design Case Studies. It runs about 4 hours across 5 lessons, and closes with Feed — Build a feed for 100 million users where one of them has 40 million followers.
Lessons
1. Requirements and the feed contract
Case study · 25 minutes
2. Fan-out on write versus on read, costed
Case study · 40 minutes
3. The hybrid, and where the threshold sits
Case study · 35 minutes
4. Ranking, and keeping it out of the hot path
Case study · 35 minutes
5. Pagination over a shifting timeline
Case study · 30 minutes
Module information
Duration
4 hours
Lessons
5
Level
Advanced
Track
Design Case Studies
Drill
Feed
Price
Free
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