HardDesign: Social Media Platform (Instagram)
How does Instagram handle the 'celebrity problem' where Selena Gomez (400M followers) posts a photo?
— Tests your understanding of this concept.
Answer Options
AFan-out on write to all 400M followers
BStore post once; celebrities' posts fetched on read; normal users get fan-out on write
CBlock celebrities from posting
DDelay celebrity posts until off-peak hours
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