How does YouTube handle millions of video notifications at once, while Discord can barely send out a couple thousand @everyone?
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Google has a top notch Cloud Computing Service called Google Cloud Platform (GCP). There are many services that can be used to manage this kind of needs. Like ”Pub/Sub” which can hold a message until it’s delivered with a throughput of 10k messages per second. Google has probably use its own plateform or something stronger so each video / YouTube creator is marked as a ”PUBlisher” and watchers are marked as ”SUBscriber”. Once a new video is created, the publisher generate a message that will be delivered to every subscribers.
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