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Velocity 2014

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Describes how a real production site scales its infrastructure to handle a billion users by redesigning request routing and load shedding, including the load balancing architecture that routes traffic across datacenters, the CDN and edge-cache tradeoffs, and a deploy pipeline that forces CSS delivery to the user in under 50 ms. Gives concrete numbers on latency and throughput, explains tools used (CDN, HAProxy, anycast, metrics and alerting stack), and what failed and what actually worked.

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