When Lady Gaga tweets, 50 million timelines need updating. Twitter's hybrid fan-out strategy, Manhattan DB, and the Snowflake ID system.
Year: 2010–2015 · Crisis: "How do we make the timeline load this fast?"
The Problem: Lady Gaga and 50 Million Followers
Here's the technical challenge Twitter faced in the 2010s:
When a user tweets, that tweet should appear in all their followers' timelines
An average user has 200 followers
Fan accounts and celebrity update pages are taking over timelines on platforms such as X and TikTok.
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