How to perform a load test with ramp up&down with fixed amount of iterations?

Grafana k6 OSS Support
7

Sorry, I still think that I am missing something :frowning_face:

But maybe this could work:

import { sleep } from 'k6';

export const options = {
  discardResponseBodies: true,
  scenarios: {
    contacts: {
      executor: 'ramping-vus',
      startVUs: 1,
      stages: [
        { duration: '2m', target: 10 },        
        { duration: '1m', target: 0 },        
      ],
      gracefulRampDown: '1m',
    },
  },
};


// a simple counter of iterations for each VU
let i = 0;

export default function () {    
  if (i > 0) {
      console.log(`no more work for the #VU: ${__VU}`)
   
      // iteration for that user already done
      // we just sleep a bit and exit
      sleep(10);
      return
  }
 
  console.log(`VU #${__VU} is doing some job`);

  // heavy work (600 requests)

  // we are done with the job
  i++;
}

Basically, the whole scheduling of execution is still managed by k6, but using this simple i variable guarantees that the VU executes only once, which means that once you reach the 10 VUs, it’s just a matter of the grace shutdown to wait when the scheduler simply stop all VUs.

Does that help? :thinking:

Cheers

1 Like