StartDiscoveryJob - AWS DataSync


Runs a DataSync discovery job on your on-premises storage system. If you haven't added the storage system to DataSync Discovery yet, do this first by using the AddStorageSystem operation.

Request Syntax

{ "ClientToken": "string", "CollectionDurationMinutes": number, "StorageSystemArn": "string", "Tags": [ { "Key": "string", "Value": "string" } ] }

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.


Specifies a client token to make sure requests with this API operation are idempotent. If you don't specify a client token, DataSync generates one for you automatically.

Type: String

Pattern: [a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}

Required: Yes


Specifies in minutes how long you want the discovery job to run.


For more accurate recommendations, we recommend a duration of at least 14 days. Longer durations allow time to collect a sufficient number of data points and provide a realistic representation of storage performance and utilization.

Type: Integer

Valid Range: Minimum value of 60. Maximum value of 44640.

Required: Yes


Specifies the Amazon Resource Name (ARN) of the on-premises storage system that you want to run the discovery job on.

Type: String

Length Constraints: Maximum length of 128.

Pattern: ^arn:(aws|aws-cn|aws-us-gov|aws-iso|aws-iso-b):datasync:[a-z\-0-9]+:[0-9]{12}:system/storage-system-[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$

Required: Yes


Specifies labels that help you categorize, filter, and search for your AWS resources.

Type: Array of TagListEntry objects

Array Members: Minimum number of 0 items. Maximum number of 50 items.

Required: No

Response Syntax

{ "DiscoveryJobArn": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


The ARN of the discovery job that you started.

Type: String

Length Constraints: Maximum length of 256.

Pattern: ^arn:(aws|aws-cn|aws-us-gov|aws-iso|aws-iso-b):datasync:[a-z\-0-9]+:[0-9]{12}:system/storage-system-[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}/job/discovery-job-[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$


For information about the errors that are common to all actions, see Common Errors.


This exception is thrown when an error occurs in the AWS DataSync service.

HTTP Status Code: 500


This exception is thrown when the client submits a malformed request.

HTTP Status Code: 400

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: