What is the "delivery mode" in AMQP?

Question

I understand that 2 options are available:

• "Non-persistent"
• "Persistent"

But what does this actually mean?

"Non-persistent" as in : the AMQP fabric will try to deliver the message if there are no consumers, the message will be dropped?

"Persistent" as in : AMQP will retry the message until a consumer accepts it??

Answer 1

@jldupont - what @nos said. Messages marked as 'persistent' that are delivered to 'durable' queues will be logged to disk. Durable queues are recovered in the event of a crash, along with any persistent messages they stored prior to the crash. For more details of this, I suggest asking on the mailing list, or having a look at the various pieces of background info on the rabbitmq web site. Please do get in touch if you have questions.

Cheers

alexis