Dive into MQ (aka ZeroMQ), the smart socket library that gives you fast, easy, message-based concurrency for your applications. With this quick-paced guide, you'll learn hands-on how to use this scalable, lightweight, and highly flexible networking tool for exchanging messages among clusters, the cloud, and other multi-system environments. MQ maintainer Pieter Hintjens takes you on a tour of real-world applications, using extended examples in C to help you work with MQ's API, sockets, and patterns. Learn how to use specific MQ programming techniques, build multithreaded applications, and create your own messaging architectures. You'll discover how MQ works with several programming languages and most operating systems--with little or no cost.Learn MQ's main patterns: request-reply, publish-subscribe, and pipelineWork with MQ sockets and patterns by building several small applicationsExplore advanced uses of MQ's request-reply pattern through working examplesBuild reliable request-reply patterns that keep working when code or hardware failsExtend MQ's core pub-sub patterns for performance, reliability, state distribution, and monitoringLearn techniques for building a distributed architecture with MQDiscover what's required to build a general-purpose framework for distributed applications