Amazon Simple Storage Service (S3) is a scalable object storage service provided by AWS. It is designed to store and retrieve any amount of data from anywhere on the web. S3 is commonly used for backup and restore, disaster recovery, data archiving, and big data analytics.
When performing a multipart upload to S3, you might encounter the InvalidPartOrder error. This error indicates that the parts of your upload are not in the correct order. The error message typically reads: "The list of parts was not in ascending order."
Multipart upload allows you to upload a single object as a set of parts. Each part is a contiguous portion of the object's data. You can upload these parts independently and in any order. After all parts are uploaded, S3 assembles them into a single object.
The InvalidPartOrder error occurs when the parts of a multipart upload are not listed in ascending order by their part number. Each part must have a unique part number between 1 and 10,000. The part numbers must be in ascending order when completing the multipart upload.
The order of parts is crucial because S3 assembles the final object based on the order of part numbers. If the parts are not in the correct order, the final object will not be constructed correctly, leading to data corruption or incomplete uploads.
To resolve the InvalidPartOrder error, follow these steps:
Ensure that each part of your upload has a unique part number and that these numbers are in ascending order. For example, if you have three parts, their numbers should be 1, 2, and 3.
You can use the AWS Command Line Interface (CLI) to list the parts of your upload and verify their order. Run the following command:
aws s3api list-parts --bucket your-bucket-name --key your-object-key --upload-id your-upload-id
This command will return a list of parts with their part numbers and sizes. Ensure the part numbers are in ascending order.
If the part numbers are not in order, you will need to re-upload the parts with the correct part numbers. Ensure that you start the upload process again and assign the correct part numbers in ascending order.
For more information about multipart uploads in S3, refer to the AWS S3 Multipart Upload Overview. For detailed AWS CLI commands, visit the AWS CLI Command Reference.
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(Perfect for DevOps & SREs)
