# BackgroundOperationType

Location: [gRPC API](https://developer.m-files.com/APIs/gRPC-API/index.md) > [Reference](https://developer.m-files.com/APIs/gRPC-API/Reference/index.md) > [Enums](https://developer.m-files.com/APIs/gRPC-API/Reference/Enums/index.md)

HTML version: https://developer.m-files.com/APIs/gRPC-API/Reference/Enums/MFiles.BackgroundOperationType/

Background operation types.

- **Full name:** `MFiles.BackgroundOperationType`
- **Proto file:** [`mfiles/enums.proto`](https://developer.m-files.com/APIs/gRPC-API/downloads/proto/mfiles/enums.proto)

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## Values

| Name | Number | Description |
|---|---|---|
| <a id="v-BACKGROUND_OPERATION_TYPE_UNKNOWN"></a>`BACKGROUND_OPERATION_TYPE_UNKNOWN` | 0 | Unknown. |
| <a id="v-BACKGROUND_OPERATION_TYPE_INDEX_METADATA"></a>`BACKGROUND_OPERATION_TYPE_INDEX_METADATA` | 1 | Index meta data. |
| <a id="v-BACKGROUND_OPERATION_TYPE_REFRESH_EXTERNAL_OBJECT_TYPE"></a>`BACKGROUND_OPERATION_TYPE_REFRESH_EXTERNAL_OBJECT_TYPE` | 2 | Refresh an external object type. |
| <a id="v-BACKGROUND_OPERATION_TYPE_REFRESH_EXTERNAL_LOCATION"></a>`BACKGROUND_OPERATION_TYPE_REFRESH_EXTERNAL_LOCATION` | 3 | Refresh an external location. |
| <a id="v-BACKGROUND_OPERATION_TYPE_PERFORM_OCR_TASK"></a>`BACKGROUND_OPERATION_TYPE_PERFORM_OCR_TASK` | 4 | Perform an OCR task. |
| <a id="v-BACKGROUND_OPERATION_TYPE_RUN_PERFORMANCE_MEASUREMENTS"></a>`BACKGROUND_OPERATION_TYPE_RUN_PERFORMANCE_MEASUREMENTS` | 5 | Run performance measurements. |
| <a id="v-BACKGROUND_OPERATION_TYPE_CLEAN_UP_ACL_DEPENDENCY_SETS"></a>`BACKGROUND_OPERATION_TYPE_CLEAN_UP_ACL_DEPENDENCY_SETS` | 6 | Clean up ACL dependency sets. |

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## Used in fields

- [`BackgroundOperationID.type`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.BackgroundOperationID/index.md#f-type): Operation type.