RabbitMQ stores contents of a queue on a single node by default. We can optionally mirror these contents across different nodes. Each mirrored queue has one master and one or more mirrors. Any operation that takes place on the queue like adding a message, consuming a message etc. happens on the master node first. Since all the messages are replicated across all mirrors and all the operations are also propagated to them, adding mirrors does not reduce the load on the queue. However, it provides us with high availability. In case, the node on which master for your mirror is located goes down, one of the mirrors can take over without impacting the availability of the queue. We can setup various different mirroring policies to suit our availability requirements. RabbitMQ provides 3 policies out of the box: Exactly: Using this you can specify exact number of replicas(master + mirrors) for the queue in the cluster. All: Queue will be replicated across all nodes on cluster. Use this ...