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During simulation, OpenDC exports data to files (see [Output](/docs/documentation/Output.md)).
The user can define what and how data is exported using the `exportModels` parameter in the experiment file.
## ExportModel
| Variable | Type | Required? | Default | Description |
|---------------------|-----------------------------------------|-----------|-----------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|
| exportInterval | Int64 | no | 300 | The duration between two exports in seconds |
| filesToExport | Int64 | no | 24 | How often OpenDC prints an update during simulation. | |
| computeExportConfig | [ComputeExportConfig](#checkpointmodel) | no | Default | The features that should be exported during the simulation |
| filesToExport | List[string] | no | all files | List of the files that should be exported during simulation. The elements should be picked from the set ("host", "task", "powerSource", "battery", "service") |
### ComputeExportConfig
The ComputeExportConfig defines which features should be exported during the simulation.
Several features will always be exported, regardless of the configuration.
When not provided, all features are exported.
| Variable | Type | Required? | Base | Default | Description |
|--------------------------|--------------|-----------|------------------------------------------------------------------------|--------------|-----------------------------------------------------------------------|
| hostExportColumns | List[String] | no | name <br/> cluster_name <br/> timestamp <br/> timestamp_absolute <br/> | All features | The features that should be exported to the host output file. |
| taskExportColumns | List[String] | no | task_id <br/> task_name <br/> timestamp <br/> timestamp_absolute <br/> | All features | The features that should be exported to the task output file. |
| powerSourceExportColumns | List[String] | no | name <br/> cluster_name <br/> timestamp <br/> timestamp_absolute <br/> | All features | The features that should be exported to the power source output file. |
| batteryExportColumns | List[String] | no | name <br/> cluster_name <br/> timestamp <br/> timestamp_absolute <br/> | All features | The features that should be exported to the battery output file. |
| serviceExportColumns | List[String] | no | timestamp <br/> timestamp_absolute <br/> | All features | The features that should be exported to the service output file. |
### Example
```json
{
"exportInterval": 3600,
"printFrequency": 168,
"filesToExport": ["host", "task", "service"],
"computeExportConfig": {
"hostExportColumns": ["power_draw", "energy_usage", "cpu_usage", "cpu_utilization"],
"taskExportColumns": ["submission_time", "schedule_time", "finish_time", "task_state"],
"serviceExportColumns": ["tasks_total", "tasks_pending", "tasks_active", "tasks_completed", "tasks_terminated", "hosts_up"]
}
}
```
In this example:
- the simulation will export data every hour (3600 seconds).
- The simulation will print an update every 168 seconds.
- Only the host, task and service files will be exported.
- Only a selection of features are exported for each file.
|
