9.1. Overview—What's a Mix?

What exactly is a test mix? In true consulting fashion, the right answer is “it depends.” The next couple of pages provide a high-level overview of a test mix, followed by more detailed discussions on this subject. For beginners, note that all test mixes must include a way to control timing, or the time it takes for a test run (or subtasks within a run) to actually execute. Sometimes this factor is controllable via the test mix itself or a test-tool configuration file, whereas other times it's left up to test-tool controller software or the team executing and monitoring the test runs.

Timing is not everything, though. Test mixes also typically allow the number of OS or other technology stack–based threads or processes ...

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