You're facing skeptical stakeholders about microservices. How can you convince them of the benefits?

"You shouldn't start a new project with microservices, even if you're sure your application will be big enough to make it worthwhile." Martin Fowler This sentence have alot of words to think about.

Microservices architecture offers significant advantages, particularly in terms of flexibility. For instance, Netflix transitioned from a monolithic system to microservices. This change allowed them to independently develop, deploy, and scale individual services, such as their recommendation engine or streaming service, without affecting the entire platform. As a result, Netflix can introduce new features faster, respond to user demands more efficiently, and reduce downtime during updates. This agility has been crucial in maintaining their competitive edge &providing a seamless user experience. For stakeholders, the benefits of this approach are evident in the company’s ability to innovate rapidly and consistently meet customer expectations

Microservices architecture allows development teams to break down a complex system into smaller, more manageable parts. Each part, or microservice, is a self-contained unit that performs a specific function within the system. Moreover, microservices enable organizations to build and maintain large-scale applications more efficiently and effectively. This approach supports continuous delivery and integration, allowing for rapid innovation and adaptation to changing business needs.

The first obstacle would be to define what micro services actually means, quite often it is analogous to point to point solutions. If compared to a windows registry, services catalogue or similar solution, it often becomes the most simple solution in a well designed system.

One of the most important aspects of microservices is their ability to scale out. Therefore, it is crucial to use the best design system for each service. High availability (HA) for each service can vary, so designers need to carefully consider and select the most appropriate HA strategy. Scalability in Microservices 1. Horizontal Scaling: Add more instances of a service to handle increased load, improving resource utilization and performance during peak times. 2. Independent Scaling: Scale each microservice based on its specific needs. For example, more instances for user authentication during login spikes, or for payment processing during sales events.

Microservices architecture greatly enhances scalability. For example, Amazon adopted microservices to handle its vast and growing e-commerce platform. With this architecture, Amazon can scale individual services like the shopping cart or user authentication independently based on demand. This means during peak shopping times, they can allocate more resources specifically to the shopping cart service without unnecessarily scaling the entire system. This targeted scalability optimizes resource use and reduces costs by avoiding over-provisioning for less active services. For stakeholders, the ability to efficiently handle peak loads and support business expansion through microservices is a clear advantage

Microservices can significantly improve system robustness. Take the case of Spotify, which leverages microservices to enhance its platform's reliability. By isolating services, Spotify ensures that if one component, like the music recommendation service, experiences an issue, it doesn't affect other parts of the application, such as music streaming or user account management. This isolation helps maintain overall service availability and reliability, which is crucial for maintaining a seamless customer experience. Furthermore, when a service does fail, Spotify can quickly address and recover the affected component without impacting the entire system. For stakeholders, this means fewer disruptions and a more resilient.

Adotar microsserviços oferece diversas vantagens significativas, sendo esses alguns pontos: 1 - Cada serviço pode usar a melhor ferramenta ou linguagem para sua função, permitindo a implementação de novas tecnologias sem revisar todo o sistema. 2- Escalabilidade: Serviços podem ser escalados de forma independente, otimizando o desempenho e a utilização de recursos. 3 - Atualizações e Manutenções Independentes: Atualizações e manutenções podem ser realizadas sem afetar o sistema inteiro, reduzindo interrupções e tempo de inatividade.

If services are considered method calls, this usually becomes a much easier sell. By complicating data exchange and transport with the actual task at hand, you easily can end up not seeing the forest for all the trees.

Another benefit of this development velocity is that microservices are self-contained. They are easier to maintain because you have an isolated context. It’s also easier to onboard and share knowledge due to these factors.

Como o aplicativo é dividido em partes menores e mais gerenciáveis, cada implantação fica mais simples, facilitando os testes e validações. Para as partes interessadas, isso traz mais segurança, pois o impacto de novas mudanças é menor e a evolução do sistema é mais controlada e gradual. No fim das contas, isso reduz o risco de problemas grandes e torna a aplicação mais resistente.

In the early stages of a business, the requirements are often straightforward, providing a clear direction for the project's architecture. This initial simplicity helps in defining the core structure and methodology to be used. However, as the business evolves, so do its needs, necessitating a more flexible and adaptive approach to design. Emergent Design is a valuable strategy in this context. It allows the architecture to evolve in response to changing business requirements, ensuring that the system remains relevant and efficient. Initially, implement the project as a single service that encapsulates several bounded contexts. This approach simplifies deployment and management while maintaining clear boundaries within the codebase.