The tree elements for our sample test plan would be like
Test Plan
Thread Group – Lets give Number of Threads to be ‘200’
HTTP Request – Lets hit http://www.ourgoalplan.com with 200 users
Synchronizing Timer – Add this timer and enter ’50’ as the number of virtual users we want to send request to the server simultaneously
View Result Tree – Use this listener to monitor the performance of the application
Aggregate Report – Use this listener to see the overall performance
Now, as we wanted our application to be hit by 200 virtual users, with the pre condition that 50 users should hit the site in four sets i.e. 50, 50, 50 and 50 which makes 200. Press ctrl + R to run the script after saving.
We would see the users getting emulated and sending request in the same pattern as we wanted by creating a Rendezvous Point.
PS : Number of threads in the Thread Group should always be greater than the ‘Number of Simultanous Users to Group By’ to make sure that Jmeter doesn’t throw any unhandled exception. Its always good to be on the safer side when going forward with Open Source Tools.