Multipart uploads in Amazon S3 allow you to upload large objects in parts, which can improve performance and reliability for large files. Here's how you can use multipart uploads for large files in S3:
Initiate a multipart upload: To start a multipart upload, you first need to initiate the upload using the InitiateMultipartUpload API operation. This operation returns an Upload ID, which you will need to keep track of for subsequent API calls.
Upload parts: After initiating the multipart upload, you can start uploading individual parts of the object using the UploadPart API operation. Each part should be between 5 MB and 5 GB in size, except for the last part, which can be smaller.
Complete the upload: Once all parts have been uploaded, you need to complete the multipart upload by calling the CompleteMultipartUpload API operation. You will need to provide the list of ETags (which are returned when you upload each part) along with the Upload ID.
Abort or cancel upload: If there are any issues during the upload process, you can abort or cancel the multipart upload by calling the AbortMultipartUpload API operation.
By using multipart uploads for large files in S3, you can improve the performance, reliability, and resumability of your uploads, especially for large files that may be subject to network interruptions or other issues.