Enabling and using S3 Transfer Acceleration - Amazon Simple Storage Service

Enabling and using S3 Transfer Acceleration

You can use Amazon S3 Transfer Acceleration transfer files quickly and securely over long distances between your client and an S3 bucket. You can enable Transfer Acceleration using the S3 console, the AWS Command Line Interface (AWS CLI), API, or the AWS SDKs.

This section provides examples of how to enable Amazon S3 Transfer Acceleration on a bucket and use the acceleration endpoint for the enabled bucket.

For more information about Transfer Acceleration requirements, see Configuring fast, secure file transfers using Amazon S3 Transfer Acceleration.


If you want to compare accelerated and non-accelerated upload speeds, open the Amazon S3 Transfer Acceleration Speed Comparison tool.

The Speed Comparison tool uses multipart upload to transfer a file from your browser to various AWS Regions with and without Amazon S3 transfer acceleration. You can compare the upload speed for direct uploads and transfer accelerated uploads by Region.

To enable transfer acceleration for an S3 bucket
  1. Sign in to the AWS Management Console and open the Amazon S3 console at https://console.aws.amazon.com/s3/.

  2. In the Buckets list, choose the name of the bucket that you want to enable transfer acceleration for.

  3. Choose Properties.

  4. Under Transfer acceleration, choose Edit.

  5. Choose Enable, and choose Save changes.

To access accelerated data transfers
  1. After Amazon S3 enables transfer acceleration for your bucket, view the Properties tab for the bucket.

  2. Under Transfer acceleration, Accelerated endpoint displays the transfer acceleration endpoint for your bucket. Use this endpoint to access accelerated data transfers to and from your bucket.

    If you suspend transfer acceleration, the accelerate endpoint no longer works.

The following are examples of AWS CLI commands used for Transfer Acceleration. For instructions on setting up the AWS CLI, see Developing with Amazon S3 using the AWS CLI.

Enabling Transfer Acceleration on a bucket

Use the AWS CLI put-bucket-accelerate-configuration command to enable or suspend Transfer Acceleration on a bucket.

The following example sets Status=Enabled to enable Transfer Acceleration on a bucket. You use Status=Suspended to suspend Transfer Acceleration.

$ aws s3api put-bucket-accelerate-configuration --bucket bucketname --accelerate-configuration Status=Enabled

Using Transfer Acceleration

You can direct all Amazon S3 requests made by s3 and s3api AWS CLI commands to the accelerate endpoint: s3-accelerate.amazonaws.com. To do this, set the configuration value use_accelerate_endpoint to true in a profile in your AWS Config file. Transfer Acceleration must be enabled on your bucket to use the accelerate endpoint.

All requests are sent using the virtual style of bucket addressing: my-bucket.s3-accelerate.amazonaws.com. Any ListBuckets, CreateBucket, and DeleteBucket requests are not sent to the accelerate endpoint because the endpoint doesn't support those operations.

For more information about use_accelerate_endpoint, see AWS CLI S3 Configuration in the AWS CLI Command Reference.

The following example sets use_accelerate_endpoint to true in the default profile.

$ aws configure set default.s3.use_accelerate_endpoint true

If you want to use the accelerate endpoint for some AWS CLI commands but not others, you can use either one of the following two methods:

  • Use the accelerate endpoint for any s3 or s3api command by setting the --endpoint-url parameter to https://s3-accelerate.amazonaws.com.

  • Set up separate profiles in your AWS Config file. For example, create one profile that sets use_accelerate_endpoint to true and a profile that does not set use_accelerate_endpoint. When you run a command, specify which profile you want to use, depending upon whether you want to use the accelerate endpoint.

Uploading an object to a bucket enabled for Transfer Acceleration

The following example uploads a file to a bucket enabled for Transfer Acceleration by using the default profile that has been configured to use the accelerate endpoint.

$ aws s3 cp file.txt s3://bucketname/keyname --region region

The following example uploads a file to a bucket enabled for Transfer Acceleration by using the --endpoint-url parameter to specify the accelerate endpoint.

$ aws configure set s3.addressing_style virtual $ aws s3 cp file.txt s3://bucketname/keyname --region region --endpoint-url https://s3-accelerate.amazonaws.com

The following are examples of using Transfer Acceleration to upload objects to Amazon S3 using the AWS SDK. Some of the AWS SDK supported languages (for example, Java and .NET) use an accelerate endpoint client configuration flag so you don't need to explicitly set the endpoint for Transfer Acceleration to bucketname.s3-accelerate.amazonaws.com.


The following example shows how to use an accelerate endpoint to upload an object to Amazon S3. The example does the following:

  • Creates an AmazonS3Client that is configured to use accelerate endpoints. All buckets that the client accesses must have Transfer Acceleration enabled.

  • Enables Transfer Acceleration on a specified bucket. This step is necessary only if the bucket you specify doesn't already have Transfer Acceleration enabled.

  • Verifies that transfer acceleration is enabled for the specified bucket.

  • Uploads a new object to the specified bucket using the bucket's accelerate endpoint.

For more information about using Transfer Acceleration, see Getting started with Amazon S3 Transfer Acceleration. For instructions on creating and testing a working sample, see Getting Started in the AWS SDK for Java Developer Guide.

import com.amazonaws.AmazonServiceException; import com.amazonaws.SdkClientException; import com.amazonaws.auth.profile.ProfileCredentialsProvider; import com.amazonaws.regions.Regions; import com.amazonaws.services.s3.AmazonS3; import com.amazonaws.services.s3.AmazonS3ClientBuilder; import com.amazonaws.services.s3.model.BucketAccelerateConfiguration; import com.amazonaws.services.s3.model.BucketAccelerateStatus; import com.amazonaws.services.s3.model.GetBucketAccelerateConfigurationRequest; import com.amazonaws.services.s3.model.SetBucketAccelerateConfigurationRequest; public class TransferAcceleration { public static void main(String[] args) { Regions clientRegion = Regions.DEFAULT_REGION; String bucketName = "*** Bucket name ***"; String keyName = "*** Key name ***"; try { // Create an Amazon S3 client that is configured to use the accelerate endpoint. AmazonS3 s3Client = AmazonS3ClientBuilder.standard() .withRegion(clientRegion) .withCredentials(new ProfileCredentialsProvider()) .enableAccelerateMode() .build(); // Enable Transfer Acceleration for the specified bucket. s3Client.setBucketAccelerateConfiguration( new SetBucketAccelerateConfigurationRequest(bucketName, new BucketAccelerateConfiguration( BucketAccelerateStatus.Enabled))); // Verify that transfer acceleration is enabled for the bucket. String accelerateStatus = s3Client.getBucketAccelerateConfiguration( new GetBucketAccelerateConfigurationRequest(bucketName)) .getStatus(); System.out.println("Bucket accelerate status: " + accelerateStatus); // Upload a new object using the accelerate endpoint. s3Client.putObject(bucketName, keyName, "Test object for transfer acceleration"); System.out.println("Object \"" + keyName + "\" uploaded with transfer acceleration."); } catch (AmazonServiceException e) { // The call was transmitted successfully, but Amazon S3 couldn't process // it, so it returned an error response. e.printStackTrace(); } catch (SdkClientException e) { // Amazon S3 couldn't be contacted for a response, or the client // couldn't parse the response from Amazon S3. e.printStackTrace(); } } }

The following example shows how to use the AWS SDK for .NET to enable Transfer Acceleration on a bucket. For information about setting up and running the code examples, see Getting Started with the AWS SDK for .NET in the AWS SDK for .NET Developer Guide.

using Amazon; using Amazon.S3; using Amazon.S3.Model; using System; using System.Threading.Tasks; namespace Amazon.DocSamples.S3 { class TransferAccelerationTest { private const string bucketName = "*** bucket name ***"; // Specify your bucket region (an example region is shown). private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2; private static IAmazonS3 s3Client; public static void Main() { s3Client = new AmazonS3Client(bucketRegion); EnableAccelerationAsync().Wait(); } static async Task EnableAccelerationAsync() { try { var putRequest = new PutBucketAccelerateConfigurationRequest { BucketName = bucketName, AccelerateConfiguration = new AccelerateConfiguration { Status = BucketAccelerateStatus.Enabled } }; await s3Client.PutBucketAccelerateConfigurationAsync(putRequest); var getRequest = new GetBucketAccelerateConfigurationRequest { BucketName = bucketName }; var response = await s3Client.GetBucketAccelerateConfigurationAsync(getRequest); Console.WriteLine("Acceleration state = '{0}' ", response.Status); } catch (AmazonS3Exception amazonS3Exception) { Console.WriteLine( "Error occurred. Message:'{0}' when setting transfer acceleration", amazonS3Exception.Message); } } } }

When uploading an object to a bucket that has Transfer Acceleration enabled, you specify using the acceleration endpoint at the time of creating a client.

var client = new AmazonS3Client(new AmazonS3Config { RegionEndpoint = TestRegionEndpoint, UseAccelerateEndpoint = true }

For an example of enabling Transfer Acceleration by using the AWS SDK for JavaScript, see Calling the putBucketAccelerateConfiguration operation in the AWS SDK for JavaScript API Reference.

Python (Boto)

For an example of enabling Transfer Acceleration by using the SDK for Python, see put_bucket_accelerate_configuration in the AWS SDK for Python (Boto3) API Reference.


For information about using other AWS SDKs, see Sample Code and Libraries.

Use the REST API PutBucketAccelerateConfiguration operation to enable accelerate configuration on an existing bucket.

For more information, see PutBucketAccelerateConfiguration in the Amazon Simple Storage Service API Reference.