RabbitMQ is ok in single server and has lots of flexibility but struggles at high throughput ( > 100k/sec) and the clustering setup is not great. There are also lots of edge case bugs.
If you don't need persistence, look at using nats.io which is a much more stable and reliable pub/sub system. You can build persistence on top of it or wait a few months until they finish their new project STAN.
If you don't need persistence, look at using nats.io which is a much more stable and reliable pub/sub system. You can build persistence on top of it or wait a few months until they finish their new project STAN.