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StresStimulus generates test workload by executing several procedures:
- Completing test iterations. StresStimulus replays a test case once per VU. A test iteration is a basic unit of load test.
- Implementing a load pattern. StresStimulus instantiates a certain number of VUs at certain moments. Two load patterns are supported: Steady load and Step load (see User Interface Reference -> Load Pattern).
- Emulating a VU load. After the VU is instantiated, a test iteration completes multiple times until the test ends.
- Ending a test. StresStimulus registers the moment a test completion condition occurs and finalizes the test according to the selected test completion method (see User Interface Reference -> Test Duration).
These procedures are executed independently and concurrently. As a result, multiple VUs may be instantiated at different times, and each of them emulates the load by looping through its respective iterations independently until the test tends. If the test consists of several test cases, then different VUs will loop through different test cases.
You can configure all steps of your test in the Configure Test section of the Workflow Tree. Alternatively, you can run the Test Wizard to assist you with setting up the most essential options. You can launch the Test Wizard by clicking the icon on the main toolbar.
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