Aliyun OSS will support shallow copy which means server will only copy metadata when copy object operation occurs.
With shallow copy, we can use copyObject api instead of multi-part copy api if we do not change object storage type & encryption type & source object is uploaded by Put / Multipart upload api.
We will try to use copyObject api, and check result. If shallow copy disabled for this object, then we will use multipart copy. So, I will remove fs.oss.multipart.upload.threshold configuration.