Dec 17, 2025 · 10 min read · Yesterday, we learned how to make a system hit the brakes when it’s overloaded. But there’s an even more important question: How does the courier know how far they’ve gotten? Today, let’s talk about checkpoint. The Courier’s Memory Problem: Which Pac...
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Dec 8, 2025 · 10 min read · The Speed Layer is like a team of couriers, rushing fresh orders from Kafka to the database. But moving fast doesn’t mean everything is fine. The Courier’s Worst Nightmare: The Pile-Up Picture yourself as a logistics dispatcher. At first, everything ...
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Aug 22, 2025 · 20 min read · A single viral live streaming event can transform a quiet platform into a global phenomenon within minutes. During such an event, streaming systems must accommodate millions of viewers, manage unpredictable surges, and deliver uninterrupted video. Pl...
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