Creates a data streaming subtask.
Operation description
- Only Cloud Parallel File Storage (CPFS) for LINGJUN V2.6.0 and later support this operation. You can view the version information on the file system details page in the console.
- You can create subtasks only for a data streaming subtask in the Executing state.
- Data streaming tasks are executed asynchronously. You can call the DescribeDataFlowSubTasks operation to query the task execution status.
- When the type of data flow task is streaming, the running status only indicates that a streaming import or export task can be created. It does not indicate that the import or export task is running.
Debugging
Authorization information
The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:
- Operation: the value that you can use in the Action element to specify the operation on a resource.
- Access level: the access level of each operation. The levels are read, write, and list.
- Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
- The required resource types are displayed in bold characters.
- If the permissions cannot be granted at the resource level,
All Resourcesis used in the Resource type column of the operation.
- Condition Key: the condition key that is defined by the cloud service.
- Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.
| Operation | Access level | Resource type | Condition key | Associated operation |
|---|---|---|---|---|
| nas:CreateDataFlowSubTask | create | *DataFlow acs:nas:{#regionId}:{#accountId}:filesystem/{#filesystemId} |
| none |
Request parameters
| Parameter | Type | Required | Description | Example |
|---|---|---|---|---|
| FileSystemId | string | Yes | The ID of the file system. | bmcpfs-370lx1ev9ss27o0**** |
| DataFlowId | string | Yes | The ID of the data flow. | df-194433a5be31**** |
| DataFlowTaskId | string | Yes | The ID of the data flow task. Note
Only the IDs of data streaming tasks are supported.
| task-38aa8e890f45**** |
| DryRun | boolean | No | Specifies whether to perform a dry run. During the dry run, the system checks whether the request parameters are valid and whether the requested resources are available. During the dry run, no data streaming subtask is created and no fee is incurred. Valid values:
| false |
| ClientToken | string | No | The client token that is used to ensure the idempotence of the request. You can use the client to generate the token, but you must make sure that the token is unique among different requests. The token can contain only ASCII characters and cannot exceed 64 characters in length. For more information, see How do I ensure the idempotence? Note
If you do not specify this parameter, the system automatically uses the request ID as the client token. The request ID may be different for each request.
| 123e4567-e89b-12d3-a456-42665544**** |
| SrcFilePath | string | Yes | The path of the source file. Limits:
| /test/file.png |
| DstFilePath | string | Yes | The path of the destination file. Limits:
| /mnt/file.png |
| Condition | object | No | The check conditions. The check must be passed after the following conditions are specified. | |
| ModifyTime | long | No | The modification time. The value must be a UNIX timestamp. Unit: ns. | 1725897600000000000 |
| Size | long | No | The file size. Unit: bytes. | 68 |
Response parameters
Examples
Sample success responses
JSONformat
{
"RequestId": "A70BEE5D-76D3-49FB-B58F-1F398211A5C3",
"DataFlowSubTaskId": "subTaskId-370kyfmyknxcyzw****"
}Error codes
| HTTP status code | Error code | Error message | Description |
|---|---|---|---|
| 400 | IllegalCharacters | The parameter contains illegal characters. | The parameter contains illegal characters. |
| 400 | MissingFileSystemId | FileSystemId is mandatory for this action. | - |
| 400 | MissingDataFlowId | DataFlowId is mandatory for this action. | - |
| 400 | InvalidFilesystemVersion.NotSupport | This Api does not support this fileSystem version. | This Api does not support this fileSystem version. |
| 403 | OperationDenied.InvalidState | The operation is not permitted when the status is processing. | The operation is not permitted when the status is processing. |
| 403 | OperationDenied.DependencyViolation | The operation is denied due to dependancy violation. | - |
| 403 | OperationDenied.DataFlowNotSupported | The operation is not supported. | - |
| 404 | InvalidParameter.InvalidFormat | The EntryList format is invalid. | - |
| 404 | InvalidParameter.SizeTooLarge | The specified EntryList size exceeds 64 KB. | - |
| 404 | InvalidDataFlow.NotFound | The specified data flow does not exist. | - |
| 404 | InvalidTaskAction.NotSupported | The task action is not supported. | - |
| 404 | InvalidTaskAction.PermissionDenied | The task action is not allowed. | - |
| 404 | InvalidSrcTaskId.NotFound | The SrcTaskId is not found. | - |
| 404 | InvalidDataType.NotSupported | The data type is not supported. | - |
| 404 | InvalidSrcTaskId.TaskIdInvalid | Source task ID is invalid. | - |
| 404 | InvalidSrcTaskId.TaskIdNotFound | Source task ID is not found. | - |
For a list of error codes, visit the Service error codes.