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#timeline-service

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Blog72.7K views1,335 votes1 reply1 comment2,800 following

How Twitter’s Fan‑Out Timeline Architecture Scales Real‑Time Feeds

Explains Twitter’s fan‑out timeline architecture, how it scales reads, the hybrid approach for celebrity accounts, and the trade‑offs engineers must consider.

scalability fanout

twitterTasadduq Burneyowner35.8K rep · 07 Oct 2026, 09:11 UTC

Guide114.3K views2,911 votes1 reply1 comment2,339 following

Minimal Architecture for a Scalable Twitter‑Style Timeline Service

A minimal yet robust architecture for a Twitter‑style timeline: decouple ingestion, use a fan‑out cache, enforce data boundaries, and monitor key metrics to keep latency low and privacy intact.

architecture

twitter timeline-serviceTasadduq Burneyowner35.8K rep · 07 Feb 2026, 01:48 UTC