I have a scenario where I need configure jmeter to achieve:
5 min interval I need to trigger request and everytime 100 more user compare to previous trigger. This way i need to reach 8000 user may be it takes 6 hours time.
This way I have to reach 8000 user (rampup 60 seconds). ( approx 6 hours overall time).
The easiest way is going for Stepping Thread Group configured like:
The above configuration should match your scenario, you can amend holding 8000 users load and ramp-down period as required. See Advanced Load Testing Scenarios with JMeter Part 4 - Stepping Thread Group and Concurrency Thread Group article for more details if required.
You can install Stepping and/or Concurrency Thread Group extensions using JMeter Plugins Manager