RabbitMQ — a node or a cluster?

RabbitMQ can operate either in a single node mode (standalone) or as part of a cluster.

• Single node: This is a simple setup where RabbitMQ runs on one server. Suitable for development, testing, or small loads.

• Cluster: Multiple RabbitMQ nodes are combined into a cluster to ensure fault tolerance, scalability, and high availability. In a cluster, queues and exchanges can be distributed across nodes, and data is replicated.

Clustering allows:

• Distributing load across servers
• Ensuring continuous operation in case of individual node failures
• Scaling the system horizontally

Thus, RabbitMQ is not just a single node but a system supporting clustering for more reliable and scalable operation.