rally/samples/tasks/scenarios/ceilometer/create-user-and-get-event.json

{
    "CeilometerEvents.create_user_and_get_event": [
        {
            "runner": {
                "type": "constant",
                "times": 10,
                "concurrency": 10
            },
            "context": {
                "users": {
                    "tenants": 2,
                    "users_per_tenant": 2
                }
            }
        }
    ]
}