public void copyLargeFile(S3Object srcObject, String dstKey) throws IOException {
try {
long partCount = srcObject.getContentLength() / multipartCopyBlockSize +
(srcObject.getContentLength() % multipartCopyBlockSize > 0 ? 1 : 0);
MultipartUpload multipartUpload = s3Service.multipartStartUpload
(bucket.getName(), dstKey, srcObject.getMetadataMap());
List<MultipartPart> listedParts = new ArrayList<MultipartPart>();
for (int i = 0; i < partCount; i++) {
long byteRangeStart = i * multipartCopyBlockSize;