How do microservice principles contribute to ensuring scalability of high-load systems?

Microservice architecture promotes scalability of high-load systems by dividing the application into independent services that can be scaled separately. Each microservice is responsible for a specific business function and can be deployed on a separate server or container. This allows:

• Horizontal scaling of only those parts of the system that experience load.
• Quick updates and deployment of services without affecting the entire system.
• Using different technologies and databases for different services, optimizing performance.

For example, if the authentication service experiences high load, its instances can be increased without the need to scale the entire system.