A deep dive into token‑bucket and leaky‑bucket rate limiting, covering core math, scaling strategies, and real‑world implementation recipes.
A practical guide to building high‑throughput, distributed rate limiters with token and leaky bucket techniques.
A deep dive into token bucket and leaky bucket algorithms, showing how to choose, implement, and operate them at scale in modern cloud services.
A production‑focused guide that compares token bucket and leaky bucket rate limiters, showing how to choose, implement, and observe them at scale.
Table of Contents Introduction Why Rate Limiting Matters in Microservices Fundamental Rate‑Limiting Algorithms 3.1 Fixed Window Counter 3.2 Sliding Window Log 3.3 Sliding Window Counter 3.4 Token Bucket 3.5 Leaky Bucket Challenges of Distributed Environments Designing a Distributed Rate Limiter 5.1 Choosing the Right Data Store 5.2 Consistency Models and Trade‑offs 5.3 Sharding & Partitioning Strategies Implementation Walk‑throughs 6.1 Redis‑Based Token Bucket (Go) 6.2 Apache Cassandra Sliding Window Counter (Java) 6.3 gRPC Interceptor for Centralised Enforcement (Node.js) Testing, Metrics, and Observability Best Practices & Anti‑Patterns Case Study: Scaling Rate Limiting for a Global E‑Commerce Platform Conclusion Resources Introduction Modern applications are increasingly built as collections of loosely coupled microservices that communicate over HTTP/REST, gRPC, or message queues. While this architecture brings agility and scalability, it also introduces new operational challenges—one of the most pervasive being rate limiting. Rate limiting protects downstream services from overload, enforces fair usage policies, and helps maintain a predictable quality of service (QoS) for end‑users. ...