Balancing Coupling in Software Design - Vladik Khononov, DOIT International | Craft Conference 2022

This talk was recorded at Craft Conference 2022. Vladik Khononov from DOIT International spoke about Architecture, Coupling, Design, Microservices and DDD. We are used to treating coupling as the necessary evil. Hence, we aim to break systems apart into the smallest services possible, in the ever-lasting quest of decoupling everything. But what results are we getting by following this reasoning? — Instead of the promised land of evolvable systems, many such “decouple everything” endeavors lead straight into the chains of distributed monoliths. Can we do better? What if there is a better way to handle coupling in distributed systems? Or even, what if instead of fighting coupling, we can use it as a heuristic for designing systems that are actually evolvable and maintainable? That’s exactly what you will learn in this session: what coupling is, and how you can use it as a design tool. We will start by taking a journey through time, and explore the different models of evaluating coupling. Next, we will combine the existing knowledge into a coherent model — a simple function for evaluating a system’s decomposition into components. This function will allow you to assess the expected effort for evolving a system and use it as a heuristic for optimizing the distributed system’s design.

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