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Appboy is an intelligent CRM for mobile-first marketers used by leading apps such as SoundCloud, Etsy, Domino’s Pizza, iHeartRadio, and more. We collect over 85 billion
data points per month from our customers’ end users and send over two billion messages to those users each month. At our scale, parallelization is a must, but distributed logic requires synchronization. We use Redis for synchronization. In this talk, I’ll go over a few use cases that we use at Appboy, such as rate limiting, and will include a deep-dive on our Redis-backed Ruby semaphore code.