Design Microservices Architecture with Patterns and Principles - Horizontal Scaling - Scale Out

The video tutorial explains horizontal scaling, which involves distributing the load across multiple servers by adding more machines without changing existing specifications. This approach enhances scalability and reliability, making it a preferred method in distributed architectures. The tutorial also distinguishes between stateless and stateful services, emphasizing that stateless services are easier to scale horizontally. It briefly mentions the CAP theorem for stateful services and focuses on implementing horizontal scaling in an ecommerce application.

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