Design Twitter/X at Scale
Design Twitter/X at Scale
HardSystem Design0% accepted
Design Twitter at scale: 300M MAU, 500M tweets/day, home timeline for any user in <800ms. Cover tweet creation, follower graph, timeline generation, and search.
Approach
Design Twitter covering tweet storage, fan-out, timeline, and search.
Input
Celebrity with 20M followers tweets
Output
No fan-out; instead injected at read time for followers timeline
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