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Real-time systemsMediumSDE-2

You need to support 10 million concurrent WebSocket connections. How do you estimate how many gateway servers you need, and what limits a single server?

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Think first

Answer out loud as you would in the room — clarify, give numbers, name the trade-off — then compare with the model answer.

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Design a high-concurrency streaming API server Lesson: Back-of-the-envelope estimation

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