Microservices

Microservices is an architectural style where applications are built as collections of small, independent services that communicate over networks. Each service focuses on a specific business capability, has its own data storage, and can be developed, deployed, and scaled independently. This contrasts with monolithic architectures where all functionality lives in a single deployable unit. For non-technical readers, microservices is like organising a company into small, focused teams rather than one large department. Each team (service) handles a specific function: orders, payments, inventory. They coordinate through clear communication channels (APIs) but can work independently. This organisation allows teams to move faster and problems in one area don't necessarily affect others. Microservices bring significant benefits but also complexity. They require distributed systems expertise, robust DevOps practices, and careful service design. Many organisations have adopted microservices successfully, but others have struggled with the operational overhead. The pattern is powerful when applied appropriately but isn't universally better than simpler architectures.

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When to use Microservices

Consider microservices when you have a large, complex application that multiple teams work on, when different parts of your system need to scale independently, or when you need to deploy changes frequently without affecting the entire system.

Microservices are less appropriate for small teams, simple applications, or organisations without mature DevOps practices. The overhead of distributed systems may outweigh the benefits in these cases. Start with a modular monolith if unsure.

Why choose Microservices?

Teams choose microservices for scalability, team autonomy, and deployment flexibility. Large organisations can divide work across many teams without stepping on each other's code. Services can be scaled individually based on demand. Technology choices can be made per-service rather than standardising everything. However, these benefits must be weighed against increased operational complexity.

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