In this chapter, we saw how to create a cluster of RabbitMQ nodes for the purpose of scaling out our broker. We saw how this allowed for the even distribution of queues on different nodes in the cluster, thus increasing storage capacity and performance in the cluster. We discussed what DISK and RAM nodes are and how they can be added and removed from a cluster; we also demonstrated how to connect to the cluster from a Java publisher/subscriber client and how a cluster tolerates failure on some of the nodes. Finally, we further extended the CSN with multiple RabbitMQ instances, forming a RabbitMQ cluster. The clustering mechanism supported by RabbitMQ has some drawbacks such as, for example, the lack of support for establishing high availability as a means of making image processing more reliable.
Overview of this book
RabbitMQ is Open Source Message Queuing software based on the Advanced Message Queue Protocol Standard written in the Erlang Language. RabbitMQ is an ideal candidate for large-scale projects ranging from e-commerce and finance to Big Data and social networking because of its ease of use and high performance. Managing RabbitMQ in such a dynamic environment can be a challenging task that requires a good understanding not only of how to work properly with the message broker but also of its best practices and pitfalls. Learning RabbitMQ starts with a concise description of messaging solutions and patterns, then moves on to concrete practical scenarios for publishing and subscribing to the broker along with basic administration. This knowledge is further expanded by exploring how to establish clustering and high availability at the level of the message broker and how to integrate RabbitMQ with a number of technologies such as Spring, and enterprise service bus solutions such as MuleESB and WSO2. We will look at advanced topics such as performance tuning, secure messaging, and the internals of RabbitMQ. Finally we will work through case-studies so that we can see RabbitMQ in action and, if something goes wrong, we'll learn to resolve it in the Troubleshooting section.
Table of Contents (18 chapters)
About the Author
About the Reviewers
Design Patterns with RabbitMQ
Administration, Configuration, and Management
Performance Tuning and Monitoring
Contributing to RabbitMQ