[rabbitmq-discuss] RabbitMQ persistence when clustering

[nathanmarz]

I'm trying to understand the behavior of a clustered RabbitMQ setup.

Specifically:

1. When you cluster, do ram nodes persist messages to their queues? Or
only disk nodes?
2. What's the state that's replicated across all nodes in a cluster?
3. When a Rabbit node goes down, does its queue become unavailable?
4. What are the conditions (if any) for which there will be lost
messages?

Thanks in advance,
Nathan