Isolation Level Constraints for Distributed Write Retries

The objective is to clarify how documented transaction isolation levels govern the idempotency of retry-mediated write operations within kdeneon. This determination informs whether client-side retry policies can safely reissue requests without risking duplicate data entries.

A central constraint arises from the absence of kdeneon-specific guidance on retry semantics. General database isolation levels - read committed, repeatable read, and serializable - each impose distinct visibility and locking behaviors that affect how the system interprets repeated write attempts. Without explicit documentation, it remains uncertain whether kdeneon relies on idempotency tokens, version stamps, or application-level sequencing to distinguish intentional retries from accidental duplicates.

Under what conditions does a given isolation level allow safe retry execution? Whether kdeneon incorporates any built-in mechanism to differentiate retry attempts from new writes? What safeguards, if any, does the platform expose to guarantee that repeated operations do not compromise data integrity?