Introduction

Publishes a fixed total number of messages to a RabbitMQ exchange. The messages are distributed evenly across the attack duration — for example, 100 messages over 10 seconds publishes approximately 10 messages/second. The effective rate is: numberOfMessages / duration.

Delivery is determined by the exchange type and its bindings: a fanout exchange copies each message to every bound queue, while direct and topic exchanges route by the routing key. Messages that no queue receives count as failures against the required success rate.

For rate-based publishing (messages per second), use Publish to Exchange (Messages / s) instead. To fill one specific queue directly, use the queue-targeted Publish (# of Messages).

Use Cases

• Verify fanout routing: publish through a fanout exchange and check that every bound queue receives the messages.
• Verify topic selectivity: publish with different routing keys and check that only the matching bindings receive messages.
• Detect broken routing: a non-matching routing key makes every message unroutable, failing the experiment instead of silently dropping traffic.

Parameters