Why do we need to use rabbitmq

Question

Why do we need RabbitMQ when we have a more powerful network framework in Python called Twisted. I am trying to understand the reason why someone would want to use RabbitMQ.

Answer 1

Twisted is a networking library that implements a number of network protocols as well as allowing you to create your own. One of the protocols that you can use with Twisted is AMQP https://launchpad.net/txamqp

RabbitMQ is an AMQP broker, i.e. a services that runs outside of your application, probably on a separate cluster of servers. AMQP is merely the protocol that is used to communicate with a message queueing broker like RabbitMQ. You get a lot of things from RabbitMQ. You can send messages persistently with guaranteed delivery so they will arrive even if your app crashes, and even if the RabbitMQ broker ends up being restarted. You get load balancing between message consumers if you have multiple consumers on the same queue. You get interoperability with apps in other languages as long as you use a reasonably open serialization format for your message bodies. AMQP allows you to break up a monolithic app into many loosely coupled parts that can run on different servers. This is a big win for long term maintenance of an application.