This covers how to get started on Joyent cloud running: MongoDB, Node.js, and JMeter. The application was written by a third party, and they set up the application so that each component runs in its own Smart Machine. Those unfamiliar with Nodestack can learn more here. Basically, Node does processing, MongoDB is a database engine, and SmartOS provides the operating system and development environment. A Smart Machine is an OS virtualized zone on SmartOS. Find a high level description of Smart Machines here. And see http://smartos.org for a description of SmartOS.