Choosing the Right OLTP Database for Microservices

Choosing the right OLTP database for microservices involves considering the complexities inherent in microservices architecture and domain-driven design. Effective management of complexity, including software cyclomatic complexity, system interactions, and operational management, is crucial, as complexity impacts decision-making. The choice of OLTP database depends on the context, such as the ecosystem of libraries that support domain-driven design, and the complexity of interactions like connection pooling and transaction management. Automation, architectural principles, and design patterns like separation of concerns and data access abstraction are important for managing complexity. Various databases, including MongoDB, PostgreSQL, MySQL, and Oracle, offer different strengths and client libraries, requiring careful evaluation based on specific use cases. ORM and ODM libraries further aid in managing data interactions. The article emphasizes the importance of team collaboration and automation in database-related tasks to maintain sanity and manage complexity effectively.