How to send number of HTTP requests/second for 1 hour with every request body is having one unique id in it in JMeter?

Question

My Requirement is:

To send 50 request/second for 1 hour continuously with below payload:

    {
     "car": 
      {
        "id": "car-${CarId}",
        "type": "four wheeler"
      },
      "associates": 
        [
          {
            "wheels": 
            {
               "id": "wheelfor${CarId}",
               "type": "wheel"
            }
          },
           {
             "steering": 
             {
               "id": "steeringfor${CarId}",
              "type": "steering"
             }
           }
        ]
      }

Here, I want to change value of ${CarId} in every request and it should be unique, too.

can anyone please help me in this?

Answer 1

1. You can make this ${CarId} random/unique by adding User Parameters preprocessor and declaring CarId variable there using ie __Random() or __RandomString() or __UUID() functions as the parameter value

   

2. In order to run your requests for 1 hour configure Thread Group as follows:

   

   the number of threads of 300 is for reference only, you may need to adjust it up or down

3. To limit requests to 50 per second add Constant Throughput Timer and configure it to send 3000 requests per minute (50 requests/second * 60 seconds)