if err != nil {
		b.Fatal(err)
	}

	// get text data generated for number of bytes equal to object size.
	textData := generateBytesData(objSize)
	// generate md5sum for the generated data.
	// md5sum of the data to written is required as input for PutObject.

	md5hex := getMD5Hash(textData)
	sha256hex := ""

	// benchmark utility which helps obtain number of allocations and bytes allocated per ops.

func cleanMetadata(metadata map[string]string) map[string]string {
	// Remove STANDARD StorageClass
	metadata = removeStandardStorageClass(metadata)
	// Clean meta etag keys 'md5Sum', 'etag', "expires", "x-amz-tagging".
	return cleanMetadataKeys(metadata, "md5Sum", "etag", "expires", xhttp.AmzObjectTagging, "last-modified", VersionPurgeStatusKey)
}

// Filter X-Amz-Storage-Class field only if it is set to STANDARD.

		},
		{
			name:     "2",
			metadata: map[string]string{"content-type": "application/octet-stream", "etag": "de75a98baf2c6aef435b57dd0fc33c86", "x-amz-storage-class": "REDUCED_REDUNDANCY", "md5sum": "abcde"},
			keys:     []string{"etag", "md5sum"},
			want:     map[string]string{"content-type": "application/octet-stream", "x-amz-storage-class": "REDUCED_REDUNDANCY"},
		},
		{
			name:     "3",

func tryDecryptETag(key []byte, encryptedETag string, sses3 bool) string {
	// ETag for SSE-C or SSE-KMS encrypted objects need not be content MD5Sum.While encrypted
	// md5sum is stored internally, return just the last 32 bytes of hex-encoded and
	// encrypted md5sum string for SSE-C
	if !sses3 {
		return encryptedETag[len(encryptedETag)-32:]
	}
	var objectKey crypto.ObjectKey
	copy(objectKey[:], key)

		h.Reset()
		_, err = io.Copy(h, gr)
		if err != nil {
			t.Fatalf("Test %d: Failed to calculate md5sum of the object: %v", i+1, err)
		}
		gr.Close()
		foundHash := h.Sum(nil)

		if !bytes.Equal(foundHash, expectedHash) {
			t.Fatalf("Test %d: Expected data to have md5sum = `%x`, found `%x`", i+1, expectedHash, foundHash)
		}
	}

	return errors.New(part.Error)
}

// CompleteMultipartUpload - completes an ongoing multipart
// transaction after receiving all the parts indicated by the client.
// Returns an md5sum calculated by concatenating all the individual
// md5sums of all the parts.
//
// Implements S3 compatible Complete multipart API.

		Name:        fi.TransitionedObjName,
		VersionID:   fi.TransitionVersionID,
		Status:      fi.TransitionStatus,
		FreeVersion: fi.TierFreeVersion(),
		Tier:        fi.TransitionTier,
	}

	// etag/md5Sum has already been extracted. We need to
	// remove to avoid it from appearing as part of
	// response headers. e.g, X-Minio-* or X-Amz-*.
	// Tags have also been extracted, we remove that as well.

	// this is required even to assert the copied object,
	bytesData := []struct {
		byteData []byte
		md5sum   string
	}{
		{byteData: generateBytesData(6 * humanize.KiByte)},
	}
	h := md5.New()
	h.Write(bytesData[0].byteData)
	bytesData[0].md5sum = hex.EncodeToString(h.Sum(nil))

	buffers := []*bytes.Buffer{
		new(bytes.Buffer),
		new(bytes.Buffer),
	}

		if err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}

		// Set the correct hex md5sum for the fan-out stream.
		fanOutOpts.MD5Hex = hex.EncodeToString(md5w.Sum(nil))

		concurrentSize := min(runtime.GOMAXPROCS(0), 100)

		fanOutResp := make([]minio.PutObjectFanOutResponse, 0, len(fanOutEntries))

	// This is a special case with size as '0' and object ends with
	// a slash separator, we treat it like a valid operation and
	// return success.
	// The response Etag headers should contain Md5Sum of empty string.
	objectName = "objectwith/"
	// create HTTP request for object upload.
	request, err = newTestSignedRequest(http.MethodPut, getPutObjectURL(s.endPoint, bucketName, objectName),