Jump-starting back-office connections
summary
A CDN deploys a tool called Riptide that jump starts new persistent TCP connections by raising the initial congestion window based on a per‑destination moving average of existing connections, grouping open sockets to estimate safe burst size. It runs as a userland script using ss and ip, no kernel patching, has run for over a year across ~90 PoPs and reports up to 30% faster pop‑to‑pop transfers for tens of terabits of traffic.
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