What is better: microservices or monolithic architecture?

There is no universal "best" option. The choice depends on many factors, including team size, project complexity, scalability requirements, budget, and deadlines.

Monolithic Architecture:

• Advantages:
  • Easier to develop and deploy in the initial stages.
  • Debugging is more convenient.
  • Single database.
  • Less overhead for interaction between components.
• Disadvantages:
  • Difficult to scale individual parts of the application.
  • Hard to implement new technologies.
  • Errors in one part can affect the entire system.
  • Longer build and testing times.
  • Becomes hard to manage as it grows.

Microservices Architecture:

• Advantages:
  • Easier to scale individual services independently.
  • Ability to use different technologies for different services.
  • Error isolation: failure of one service does not affect others.
  • Suitable for large teams and complex projects.
  • Fast development and deployment cycle for individual services.
• Disadvantages:
  • Complexity of managing a distributed system.
  • More overhead for interaction between services (API).
  • Complexity of debugging distributed transactions.
  • Requires more mature infrastructure and automation tools (CI/CD, monitoring).
  • Complexity of data consistency between services.

When to choose what:

• Monolith: A good choice for startups, small projects, applications with limited functionality, where speed to market is critical.
• Microservices: Suitable for large, complex projects requiring high scalability, independent component development, and use of various technologies.

It is also important to consider the possibility of evolving from monolith to microservices as the project grows.