надёёжьна, мамой клянуус!
Messages may be published as persistent, which makes the AMQP broker persist them to disk. If the server is restarted the system ensures that received persistent messages are not lost.
ни одного упоминания fsync
с трудом через гугл:
Marking messages as persistent doesn't fully guarantee that a message won't be lost. Although it tells RabbitMQ to save the message to disk, there is still a short time window when RabbitMQ has accepted a message and hasn't saved it yet. Also, RabbitMQ doesn't do fsync(2) for every message
как же надоели дегенераты на каждом шагук