What are the advantages and disadvantages of monolithic and microservices architectures compared to each other?

Monolith — is an architecture where the entire application is built as a single unit.

Advantages:

• Simplicity of development and testing in the initial stages.
• Easier to deploy, as there is one artifact.
• Fewer complexities with inter-process communication.

Disadvantages:

• Difficult to scale individual parts of the application.
• Changing one part requires rebuilding and redeploying the entire monolith.
• Challenges with maintenance and development as the codebase grows.

Microservices — is an architecture where the application is divided into independent services that interact via APIs.

Advantages:

• Scalability of individual services as needed.
• Independent development and deployment of services.
• Increased fault tolerance: a failure of one service does not break the entire application.

Disadvantages:

• Complexity in organizing interaction between services.
• Infrastructure setup required (service discovery, load balancing, monitoring).
• Increased complexity in testing and debugging.

The choice depends on the size and requirements of the project: monoliths are simpler for small applications, microservices are better suited for large and rapidly growing systems.