What is microservices architecture?

Microservices architecture is a way of building an application as a set of small, independent services, each of which performs one clear business function and interacts with the others through lightweight protocols (usually HTTP or messages).

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#The main idea

Instead of one large monolith, the system is split into many autonomous modules: a separate authorization service, catalog, payments, notifications, and so on. Each microservice can be developed, updated, and scaled independently.

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#Characteristic features

• Each service has its own database and logic.
• Communication happens through APIs or message queues.
• Teams can write services in different languages.
• A failure in one service does not bring down the whole system.

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#Advantages

Flexibility and scalability. Independent deployment and updates. Simple horizontal scaling (load can be distributed).

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#Disadvantages

Harder debugging and monitoring. Network latency and communication errors appear. Requires a well-thought-out infrastructure (logging, load balancing, DevOps).

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Summary: microservices architecture is a way to make the system modular and resilient, where each part is a self-contained mini-service working as part of a larger whole.