LeetDezine — System Design and Internals
Expedition — Level 3 System Design Case Studies
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    Level 3 of 5

    Expedition

    You're designing the infrastructure itself now. No more obvious solutions — just hard tradeoffs, production failure modes, and decisions that affect every service above you.

    EXPEDITION
    Rate Limiter
    Design a distributed rate limiter — token bucket, sliding window, Redis atomicity, fail-open vs fail-closed.
    Token Bucket Sliding Window Redis Atomicity DDoS Defense Rule Storage
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