[rabbitmq-discuss] When are messages persisted to disk?

[Alvaro Videla]

Hi,

When does RabbitMQ persist messages to disk? 

I would assume that if the message is published with: delivery-mode = 2  then it will be persisted ALWAYS. Is that the case?

What happens with messages with delivery-mode  = 1? Are they kept in memory? Are they saved to disk to the TRANSIENT_MSG_STORE?

Is it correct to say that transient queues get their messages saved to the TRANSIENT_MSG_STORE which is wiped out if RabbitMQ restarts?

Are there situations where the message is directly delivered to the consumer without being persisted to disk?

Regards,

Alvaro