> ## Documentation Index
> Fetch the complete documentation index at: https://cloudsim-ho-project.puneetchandna.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Advanced Scenarios

> How to create and customize simulation scenarios.

## Modifying Existing Scenarios

You can easily modify the number of VMs and hosts for the existing scenarios by changing the values in the `config.properties` file.

For example, to change the number of VMs and hosts for the "Medium" scenario, you would modify the following properties:

```properties theme={null}
scenario.medium.vms=150
scenario.medium.hosts=25
```

## Enabling Disabled Scenarios

The `Large` and `XLarge` scenarios are disabled by default for stability. You can enable them by uncommenting them in the `config.properties` file and adding them to the `scenarios.enabled` list.

```properties theme={null}
# scenario.large.vms=200
# scenario.large.hosts=40
# scenario.large.complexity=4
# scenario.xlarge.vms=400
# scenario.xlarge.hosts=100
# scenario.xlarge.complexity=5

scenarios.enabled=Micro,Small,Medium,Large,XLarge
```

## Creating Custom Scenarios with `ScenarioGenerator.java`

The framework includes a powerful `ScenarioGenerator.java` class that allows you to create highly customized and complex scenarios. This is ideal for researchers who need to test algorithms under specific conditions.

The `ScenarioGenerator` supports customization across three key dimensions:

* **`ScenarioType`:** Defines the overall characteristics of the environment (e.g., `HOMOGENEOUS`, `HETEROGENEOUS`, `OVERSUBSCRIBED`).
* **`WorkloadPattern`:** Simulates different application behaviors (e.g., `CONSTANT`, `BURSTY`, `PERIODIC`).
* **`VmSizeDistribution`:** Controls the mix of VM sizes (e.g., `UNIFORM`, `NORMAL`, `BIMODAL`).