CreateDataRepositoryAssociation - Amazon FSx
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Creates an Amazon FSx for Lustre data repository association (DRA). A data repository association is a link between a directory on the file system and an Amazon S3 bucket or prefix. You can have a maximum of 8 data repository associations on a file system. Data repository associations are supported on all FSx for Lustre 2.12 and 2.15 file systems, excluding scratch_1 deployment type.

Each data repository association must have a unique Amazon FSx file system directory and a unique S3 bucket or prefix associated with it. You can configure a data repository association for automatic import only, for automatic export only, or for both. To learn more about linking a data repository to your file system, see Linking your file system to an S3 bucket.


CreateDataRepositoryAssociation isn't supported on Amazon File Cache resources. To create a DRA on Amazon File Cache, use the CreateFileCache operation.

Request Syntax

{ "BatchImportMetaDataOnCreate": boolean, "ClientRequestToken": "string", "DataRepositoryPath": "string", "FileSystemId": "string", "FileSystemPath": "string", "ImportedFileChunkSize": number, "S3": { "AutoExportPolicy": { "Events": [ "string" ] }, "AutoImportPolicy": { "Events": [ "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.


Set to true to run an import data repository task to import metadata from the data repository to the file system after the data repository association is created. Default is false.

Type: Boolean

Required: No


(Optional) An idempotency token for resource creation, in a string of up to 63 ASCII characters. This token is automatically filled on your behalf when you use the Amazon Command Line Interface (Amazon CLI) or an Amazon SDK.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 63.

Pattern: [A-za-z0-9_.-]{0,63}$

Required: No


The path to the Amazon S3 data repository that will be linked to the file system. The path can be an S3 bucket or prefix in the format s3://myBucket/myPrefix/. This path specifies where in the S3 data repository files will be imported from or exported to.

Type: String

Length Constraints: Minimum length of 3. Maximum length of 4357.

Pattern: ^[^\u0000\u0085\u2028\u2029\r\n]{3,4357}$

Required: Yes


The globally unique ID of the file system, assigned by Amazon FSx.

Type: String

Length Constraints: Minimum length of 11. Maximum length of 21.

Pattern: ^(fs-[0-9a-f]{8,})$

Required: Yes


A path on the file system that points to a high-level directory (such as /ns1/) or subdirectory (such as /ns1/subdir/) that will be mapped 1-1 with DataRepositoryPath. The leading forward slash in the name is required. Two data repository associations cannot have overlapping file system paths. For example, if a data repository is associated with file system path /ns1/, then you cannot link another data repository with file system path /ns1/ns2.

This path specifies where in your file system files will be exported from or imported to. This file system directory can be linked to only one Amazon S3 bucket, and no other S3 bucket can be linked to the directory.


If you specify only a forward slash (/) as the file system path, you can link only one data repository to the file system. You can only specify "/" as the file system path for the first data repository associated with a file system.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 4096.

Pattern: ^[^\u0000\u0085\u2028\u2029\r\n]{1,4096}$

Required: No


For files imported from a data repository, this value determines the stripe count and maximum amount of data per file (in MiB) stored on a single physical disk. The maximum number of disks that a single file can be striped across is limited by the total number of disks that make up the file system.

The default chunk size is 1,024 MiB (1 GiB) and can go as high as 512,000 MiB (500 GiB). Amazon S3 objects have a maximum size of 5 TB.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 512000.

Required: No


The configuration for an Amazon S3 data repository linked to an Amazon FSx Lustre file system with a data repository association. The configuration defines which file events (new, changed, or deleted files or directories) are automatically imported from the linked data repository to the file system or automatically exported from the file system to the data repository.

Type: S3DataRepositoryConfiguration object

Required: No


A list of Tag values, with a maximum of 50 elements.

Type: Array of Tag objects

Array Members: Minimum number of 1 item. Maximum number of 50 items.

Required: No

Response Syntax

{ "Association": { "AssociationId": "string", "BatchImportMetaDataOnCreate": boolean, "CreationTime": number, "DataRepositoryPath": "string", "DataRepositorySubdirectories": [ "string" ], "FailureDetails": { "Message": "string" }, "FileCacheId": "string", "FileCachePath": "string", "FileSystemId": "string", "FileSystemPath": "string", "ImportedFileChunkSize": number, "Lifecycle": "string", "NFS": { "AutoExportPolicy": { "Events": [ "string" ] }, "DnsIps": [ "string" ], "Version": "string" }, "ResourceARN": "string", "S3": { "AutoExportPolicy": { "Events": [ "string" ] }, "AutoImportPolicy": { "Events": [ "string" ] } }, "Tags": [ { "Key": "string", "Value": "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 response object returned after the data repository association is created.

Type: DataRepositoryAssociation object


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


A generic error indicating a failure with a client request.

HTTP Status Code: 400


No Amazon FSx file systems were found based upon supplied parameters.

HTTP Status Code: 400


The error returned when a second request is received with the same client request token but different parameters settings. A client request token should always uniquely identify a single request.

HTTP Status Code: 400


A generic error indicating a server-side failure.

HTTP Status Code: 500


An error indicating that a particular service limit was exceeded. You can increase some service limits by contacting Amazon Web Services Support.

HTTP Status Code: 400


The requested operation is not supported for this resource or API.

HTTP Status Code: 400

See Also

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