---
title: "S3MultipartUpload | Grafana k6 documentation"
description: "S3MultipartUpload is returned by the S3Client.createMultipartUpload method when creating a multipart upload."
---

> For a curated documentation index, see [llms.txt](/llms.txt). For the complete documentation index, see [llms-full.txt](/llms-full.txt).

# S3MultipartUpload

S3MultipartUpload is returned by the [`createMultipartUpload(bucketName, objectKey)`](/docs/k6/latest/javascript-api/jslib/aws/s3client/createmultipartupload/) method when creating a [multipart upload](https://docs.aws.amazon.com/AmazonS3/latest/API/API_CreateMultipartUpload.html).

Expand table

| Name                         | Type   | Description                   |
|------------------------------|--------|-------------------------------|
| `S3MultipartUpload.key`      | string | The S3 Multipart object’s key |
| `S3MultipartUpload.uploadId` | Date   | The S3 Multipart upload Id    |

### Example

JavaScript ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```javascript
import {
  AWSConfig,
  S3Client,
} from 'https://jslib.k6.io/aws/0.14.0/s3.js';

const awsConfig = new AWSConfig({
  region: __ENV.AWS_REGION,
  accessKeyId: __ENV.AWS_ACCESS_KEY_ID,
  secretAccessKey: __ENV.AWS_SECRET_ACCESS_KEY,
  sessionToken: __ENV.AWS_SESSION_TOKEN,
});

const s3 = new S3Client(awsConfig);

const testBucketName = 'test-jslib-aws';
const testFileKey = 'multipart.txt';

export default async function () {
  // Initialize a multipart upload
  const multipartUpload = await s3.createMultipartUpload(testBucketName, testFileKey);
  console.log(multipartUpload.uploadId);

  // Abort multipart upload
  await s3.abortMultipartUpload(testBucketName, testFileKey, multipartUpload.uploadId);
}
```

*A k6 script that will create a multipart upload and log the multipart `uploadId` and abort the multipart upload*