How to Avoid Inconsistent Data in Systems Composed of Multiple Services? - Saga Pattern

The article discusses the Saga pattern in the context of Node.js and traditional distributed transactions in microservices systems. The Saga pattern is an elegant solution to the problem of transaction management in environments where operations can be spread across multiple services. In traditional systems, transactions are atomic, but in microservices, they often cannot be executed in one go, potentially leading to data integrity issues. By describing the Saga pattern, the author presents how to achieve long-running transactions in microservices while ensuring that in the event of an error, appropriate steps are taken to roll back or compensate for the operations. This approach can be likened to a sequence of operations, where each operation is handled separately, and if needed, any of them can be undone, which is crucial for maintaining system consistency. The article also highlights the role of technologies, such as orchestration platforms and design principles, that aid in the practical implementation of the Saga pattern.