thinkharderdev commented on issue #6793:
URL: https://github.com/apache/arrow-rs/issues/6793#issuecomment-2499015544

   So there are a couple of issues with how multi-part upload is implemented:
   
   The initial PUT request to CreateMultipartUpload must specify the checksum 
algo or else calling PutPart with the checksum will fail (eg set 
x-amz-checksum-algorithm: SHA256 on the request)
   When calling CompleteMultipartUpload we need to send all the part checksums 
in the request (see 
`https://docs.aws.amazon.com/AmazonS3/latest/API/API_CompleteMultipartUpload.html)
   So this means that we need to keep the checksums in the PartId for when we 
complete the upload


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