How can I optimize performance when uploading large files to S3 across multiple AWS Regions?

To upload a 1 GB file to S3 in less than 1 minute, your application's end users need to achieve an average upload rate of 17 MB per second. Assuming that criteria can be met for your use case, you'll need to plan for a transfer method that can reach an upload rate of 17 MB per second.

When you upload large files to S3, it's a best practice to use multipart uploads. Using multipart uploads allows you to break down a larger file into smaller parts for quicker upload speeds. For more information, see How can I optimize performance when I upload large files to Amazon S3?

Note: A multipart upload requires that a single file is uploaded in not more than 10,000 distinct parts. You must be sure that the chunksize that you set balances the part file size and the number of parts. For example: If the file size is 1 GB and your average upload rate is 500 KB per second for each TCP connection, then you'd want to configure at least a 34-part upload with a part size that's equal to or smaller than 30 MB.