How to randomize active robots

[perf tester]

Hi,

I would like randomize the active robots. For example, Out of 100 robots
configured in the
test, i can limit 5 robots to be active. But the same robots are used for
the entire test
duration. I would like the tool to pickup the next 5 robots from the
remaining 95 robots
configured until all the robots are used 5 at a time. Appreciate if someone
can guide me to
achieve this either by using some parameters in phases or by any other
means.

Thanks,
Krish.
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