Microservices

Rate limiting is a technique used to control the rate at which users or systems can access a resource. This is crucial for preventing abuse, ensuring service availability, and protecting backend systems from overload. By limiting the number of requests within a specific timeframe, rate limiting helps to maintain a …

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The Database per Service pattern dictates that each microservice should have its own dedicated database. This contrasts with a shared database approach where multiple services access a single database, which is a common anti-pattern in microservice architectures. The key principle is to decouple data storage from the …

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The Config Server pattern centralizes configuration management for distributed systems, particularly microservices. Instead of embedding configuration directly within applications or duplicating it across various deployment environments, a dedicated Config Server acts as a single source of truth. Client applications …

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The Ambassador pattern provides a single point of entry for a system (or set of backend services) while abstracting away the internal complexity. It acts as a forward-facing proxy that handles requests, potentially transforming them, adding security, and routing them to the appropriate backend. This decouples clients …

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The Bulkhead Cache pattern enhances system resilience by isolating a shared, potentially unreliable resource – a cache – from the rest of the application. It achieves this by limiting the number of concurrent requests that can access the cache. If the cache is slow or fails, the bulkhead prevents cascading failures by …

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Distributed tracing is a methodology used to profile and monitor transactions as they flow through a distributed system. Unlike traditional logging and monitoring, which focus on individual service metrics, distributed tracing tracks requests across multiple services, providing insight into the entire end-to-end …

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The API Gateway pattern provides a single entry point for all clients accessing a set of backend services. It sits in front of these services, abstracting their complexity and providing features like request routing, composition, transformation, and authentication. This simplifies client development, improves security, …

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