How We Built Rate Limiting Capable of Scaling to Millions of Domains.¶
Cloudflare. (2017). How We Built Rate Limiting Capable of Scaling to Millions of Domains.
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Primes¶
- Rate Limiting
- The fixed-window alternative exhibits a flaw the formalism exposes: an actor spending the full budget at the end of one window and the start of the next achieves twice the nominal rate at the boundary — the edge effect that motivates sliding windows.
This sourceDocuments the fixed-window boundary/edge effect (a burst straddling a window reset can double the effective rate) and the sliding-window-counter approximation introduced to fix it.
- The fixed-window alternative exhibits a flaw the formalism exposes: an actor spending the full budget at the end of one window and the start of the next achieves twice the nominal rate at the boundary — the edge effect that motivates sliding windows.
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