System Design: How to Design a Rate Limiter?

What is a Rate Limiter?

Rate limiting refers to preventing the frequency of an operation from exceeding a defined limit. In large-scale systems, rate limiting is commonly used to protect underlying services and resources. In distributed systems, Rate limiting is used as a defensive mechanism to protect the availability of shared resources. It is also used to protect APIs from unintended or malicious overuse by limiting the number of requests that can reach our API in a given period of time.

In this blog, we’ll see how will tackle the question of designing a rate limiter in a system design interview.

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