Scaling an Instagram feed from scratch ?
How do you build a home feed that survives millions of users without your database catching fire?
We built it 4 different ways — each one broke, and we showed you exactly why. From a naive SQL query that works for your first 1,000 users, all the way to a hybrid system where normal users get push delivery and celebrities get pulled at read time, all backed by Redis.
This is the architecture that actually survives at scale.
Save this. You'll need it. ?
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