An in-progress multipart upload is a multipart upload that has been initiated, using the InitiateMultipartUpload request, but has not yet been completed or aborted.

This operation returns at most 1,000 multipart uploads in the response by default. The number of multipart uploads can be further limited using the MaxUploads property on the request parameter. If there are additional multipart uploads that satisfy the list criteria, the response will contain an IsTruncated property with the value set to true. To list the additional multipart uploads use the KeyMarker and UploadIdMarker properties on the request parameters.