Microservice applications versus monoliths

The benefits of microservices architectures can be better understood by comparing them with monolithic architectures.

The benefits of microservices over monoliths are phenomenal when they are designed and deployed correctly for the appropriate use case. Microservices are not a silver bullet; in many use cases, they might actually bring more issues than benefits. So choosing microservices should be done with great care and based on use cases.

It is not as simple as splitting a monolithic application based on structure, component, or functionality and then deploying them as individual services. This will not work out. Converting a monolithic application or even a monolithic design into microservices needs a clear vision of the product. It includes knowledge of what part of the project will change and what part will be consistent. We must have low-level details, such as which entities we should group together and those that can be separated. 

This clearly illustrates the need for an ever-evolving model. It is much easier to split the technologies used in the application, but not the interdependent models or the business logic of the application. So it is essential to place the project's primary focus on the core domain and its logic.

Microservices should be independent. They will fail when one component is tightly coupled with another. The trickiest part is identifying and segregating the components.

When we have done that, it offers the following benefits over monolithic applications.