Sequential and parallel execution with different number of users

[David Leonhartsberger]

I have the following use case

For my load test I need to setup my system state, I do this with gatling because its quite handy.

First 1 users needs to setup the global system state, this takes approx 20 seconds

Now I want to setup different sub parts of the system in parallel, this should also be done by just 1 user, in the graphic below this are the "Setup Data A" and "Setup Data B" parts. Setup Data A takes ~3 min and Setup Data B takes ~15 min (a lot of requests)

After the Data setup for A or B is done, more users can start to load test, those users should of course only start after all the setup for the specific part was done.

How would I model such a setup with gatling?

    |

                    |

                  Setup 

          Global System State

                  1 User

                    |

                    |

                   / \

                  /   \

                 /     \

                /       \

               /         \

              /           \

             /             \

          Setup           Setup

         Data A           Data B

          1 user          1 user

           |                |

           |                |

       Load Test A      Load Test B

        30 users         50 users

What I currently have is this:

val authorizationSmall = scenario("Authorization Small")
  .doIf(s => s.userId == 1) {
    exec(Entities.setupEntityTypes) // should actually be done first before all other steps, but where to put this?
    .exec(setupSmallCompartment)
  }
  .pause(5 seconds)
  .rendezVous(TestData.Compartment_Small.subjects)
  .exec(checkSmallCompartment)

val authorizationMedium = scenario("Authorization Medium")
  .doIf(s => s.userId == 1) {
    exec(setupMediumCompartment)
  }
  .pause(5 seconds)
  .rendezVous(TestData.Compartment_Medium.subjects)
  .exec(checkMediumCompartment)

val authorizationLarge = scenario("Authorization Large")
  .doIf(s => s.userId == 1) {
    exec(setupLargeCompartment)
  }
  .pause(5 seconds)
  .rendezVous(TestData.Compartment_Large.subjects)
  .exec(checkLargeCompartment)

setUp(
  Entities.setupEntityTypes.inject(atOnceUsers(1)), // should actually be done first before the next 3 steps, but not in parallel, but where to put this?
  authorizationSmall.inject(atOnceUsers(TestData.Compartment_Small.subjects)),
  authorizationMedium.inject(atOnceUsers(TestData.Compartment_Medium.subjects)),
  authorizationLarge.inject(atOnceUsers(TestData.Compartment_Large.subjects))
).protocols(httpConf)