Test Controller and Test Agent Requirements
Several test types including unit, Web performance, load, and manual tests are integrated into Visual Studio. Visual Studio Test Professional 2010 enables Visual Studio Application Lifecycle Management users to run tests on remote computers using a test controller and one or more agents. For more information, see Installing and Configuring Visual Studio Agents and Test and Build Controllers.
Both the test controller and test agent computers have specific hardware and software requirements. In addition, if you want to deploy the test controller and test agent computers across multiple languages, you must plan how to support those languages.
The following table shows the recommended hardware requirements for deploying a test controller and test agents.
< 1000 virtual users
< 2000 virtual users
Dual processor 2.6 GHz
N x 2000 virtual users
Scale out to N agents each with Dual 2.6 Ghz
< 30 computers in the test environment. This includes agents and servers under test.
N x 30 computers in the test environment. This includes agents and servers under test.
N 2.6 GHz processors
The number of virtual users will vary widely from test to test. A key cause of this variance is variance in think times, or user delays. For more information, see Editing Think Times to Simulate Web Site Human Interaction Delays in Load Tests Scenarios. In a load test, Web tests are generally more efficient and generate more load than unit tests. The numbers in the preceding table are valid for running Web tests with 3-5 second think times on a typical Web application.
The guidelines presented here are provided as general guidance for hardware planning. Test performance will vary greatly based on the amount of test data and the number of test agents. For test agents, the CPU speed and memory available will limit the test load. Test controllers need greater resources, depending on the number of test agents and the amount of data involved in the tests.
The server that is running Test Professional 2010 should have a reliable network connection with a minimum bandwidth of 1 Mbps and a latency maximum of 350ms. There should be no firewall between the test agents and the test controller. If your test performance does not meet your expectations, consider upgrading your hardware configuration.
Additional Hardware Considerations
Test agents generate a large amount of data on the test controllers, depending on the duration of the test and the size of the test. Generally, you should plan for an additional 10 GB of hard disk storage for every 24 hours of test data.
In addition to the hardware recommended here, you should consider additional hardware for critical servers, such as redundant power supplies and redundant fans.
Windows Server 2008 Release 2 or later versions
Windows Server 2008 SP2 or later versions
Windows Server 2003 SP2 or later versions
Windows 7 Original release or later versions
Windows Vista SP2 or later versions
Windows XP Professional x86 with SP3 or later versions
In addition to the required software listed here, you should consider whether you want to install additional management or security software, such as backup software or firewalls.
To avoid confusion and simplify operation, a test controller and test agents should be configured to use the same language as the computer's operating system and that of Team Foundation Server. If the test agent and test controller are installed on different computers, they must be configured to use the same language. You can, however, install another language version of Test Professional 2010 on an English-language operating system, as long as that language matches that of the Team Foundation Server deployment.