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Rate Limiting

Rate limiting bounds how many requests an identity may make per window, using counters or token buckets keyed by user, API key, or IP, and signals excess with 429 plus Retry-After. It protects shared capacity and blunts abuse, trading a little legitimate burst traffic for stability.

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Design a Distributed Rate Limiter w/ a Ex-Meta Staff Engineer: System Design Breakdown

Video tutorial: Design a Distributed Rate Limiter w/ a Ex-Meta Staff Engineer: System Design Breakdown