CQRS - Design Pattern

TikTok Serves Millions of Videos Per Second — Here's the Pattern Behind It Ever wondered why TikTok's feed loads before your thumb even finishes swiping? It's not magic. It's not infinite servers. It's a pattern called CQRS — Command Query Responsibility Segregation. TikTok's read-to-write ratio is roughly 1000:1. For every creator uploading a video, a thousand people are scrolling their feeds. A traditional architecture — one database, one model, reads and writes sharing everything — collapses under that imbalance. Locking issues, heavy indexing, data mismatch, security challenges — these aren't edge cases at TikTok's scale. They're daily reality. CQRS solves this by splitting the system into two completely separate worlds: Commands handle everything that changes state — uploading a video, hitting like, posting a comment. They prioritize correctness above everything else. Queries handle everything that reads state — loading your feed, searching a hashtag, opening a video. They priorit