Which deployment model is primarily used in OCI for running complex, distributed applications?

The microservices architecture is the deployment model primarily used in Oracle Cloud Infrastructure (OCI) for running complex, distributed applications. This approach enables the development of applications as small, independent services that communicate over APIs. Each microservice can be developed, deployed, and scaled independently, allowing teams to build and manage applications more efficiently, particularly in environments where agility and scalability are essential.

Microservices are particularly well-suited for complex applications because they allow for modularity, meaning different parts of an application can be updated without affecting the entire system. This architecture also supports the use of various technology stacks for different services, enhancing flexibility and innovation.

In contrast, a monolithic architecture involves a single, unified codebase where all components are tightly coupled, making updates and scaling more challenging. Serverless architecture can simplify certain aspects of application deployment and management, but is not specifically aimed at managing complex distributed applications as effectively as microservices. Traditional virtual machine deployment lacks the inherent agility and scalability features that microservices offer, especially in cloud environments designed to handle dynamic loads and foster rapid development cycles.