Which approach can be taken to achieve reliability in non-transactional systems?

Achieving reliability in non-transactional systems is crucial, especially in environments where data loss or message processing failure can have significant repercussions. Implementing a reliability pattern with persisted queues is an effective strategy to ensure that messages are stored and can be retried in the event of a failure. Persisted queues allow for the reliable storage of messages outside of the application's transient state, meaning that even if the application experiences issues or crashes, the queued messages are retained and can be processed later.

This approach enhances the overall reliability of a system by decoupling message producers from consumers and allowing for safe retry mechanisms. It can handle spikes in load or system outages without losing critical data, as messages can sit in the queue until they can be properly processed. Utilizing persisted queues thus accommodates the non-transactional nature of the system while still providing a robust method for ensuring message delivery and processing integrity.

In contrast, synchronous calls between flows do not guarantee reliability because if one flow fails, it could lead to message loss or unhandled exceptions. Avoiding any form of message queuing can jeopardize reliability, as it leaves the system vulnerable to message loss during processing. Relying solely on transactional systems may not be practical in all scenarios, particularly in environments that require high