The sale starts at 12:00. Marketing wants all 50 million users to know, and most of them have the app closed. Your server can't call a phone, and 50 million is a lot of phones to reach in one minute.
Software developer · Writing system design with real numbers and tests
Software developer who writes about system design the practical way. I take interview-style questions like rate limiters, flash sales, and large file uploads, then test them on my own machine and share what actually breaks. New post every few days at System Design with Param.
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