VSTS LoadTest在MSDN介绍文章中老是提到Rig，那么Rig到底是什么呢？
其实在VSTS Team Suite版本中并没有这个功能组件，这个组件主要是用来做压力测试的控制器和代理器的。在MSDN上有一段解释的话，顺便贴上来：
What Rig?
Visual Studio Team Edition for Testers can use a group of computers to generate simulated load for testing, and to run tests remotely and simultaneously on several computers. This group of computers consists of a single controller and one or more agents, which are collectively called a rig.
Why Rig?
A rig is used to generate more load than a single computer can generate alone.
Visual Studio 2005 Team Test Load Agent：
装好后，在系统的服务中可以发现增加了Visual Studio Team Test Agent这个服务：
启动服务后，在VSTS的Administer Test Controller可以添加代理，从事大规模的负载测试了，
