XL: Rename objectN to part.N (#2019)

Fixes #2015

docs/backend/fs/fs.json

@@ -1,5 +1,5 @@
 {
-    "version": "1",
+    "version": "1.0.0",
     "format": "fs",
     "minio": {
         "release": "DEVELOPMENT.GOGET"
@@ -7,7 +7,7 @@
     "parts": [
         {
             "number": 1,
-            "name": "object1",
+            "name": "part.1",
             "size": 29,
             "eTag": "",
         },

docs/backend/xl/uploads.json

@@ -1,5 +1,5 @@
 {
-    "version": "1",
+    "version": "1.0.0",
     "format": "xl",
     "uploadIds": [
         {

docs/backend/xl/xl.json

@@ -4,19 +4,13 @@
             "number": 1,
             "size": 5242880,
             "etag": "3565c6e741e69a007a5ac7db893a62b5",
-            "name": "object1"
+            "name": "part.1"
         },
         {
             "number": 2,
             "size": 5242880,
             "etag": "d416712335c280ab1e39498552937764",
-            "name": "object2"
-        },
-        {
-            "number": 3,
-            "size": 4338324,
-            "etag": "8a98c5c54d81c6c95ed9bdcaeb941aaf",
-            "name": "object3"
+            "name": "part.2"
         }
     ],
     "meta": {
@@ -36,12 +30,12 @@
         "data": 5,
         "checksum": [
             {
-                "name": "object1",
+                "name": "part.1",
                 "algorithm": "blake2b",
                 "hash": "173c2cda7fb9e2798f91ba10135b65475fd2b97684355b328941d1c470a37549502672b2b4630c8268d5e5f79c8eb2fe433a25c6368f31d75b2c0504e3104c0e",
             },
             {
-                "name": "object2",
+                "name": "part.2",
                 "algorithm": "blake2b",
                 "hash": "14f9ba0006b2db7cd171507e79032ad3a34eab7df02b6564c487614b6d1e6613343a4f56074aa3473ac9c3b26e00cbbeae937d478cca4cfb138e72838ebb0826",
             },
@@ -53,5 +47,5 @@
         "size": 14824084
     },
     "format": "xl",
-    "version": "1"
+    "version": "1.0.0"
 }

fs-v1-multipart.go

@@ -488,7 +488,7 @@ func (fs fsObjects) CompleteMultipartUpload(bucket string, object string, upload
 		return "", err
 	}
 
-	tempObj := path.Join(tmpMetaPrefix, uploadID, "object1")
+	tempObj := path.Join(tmpMetaPrefix, uploadID, "part.1")
 
 	// Allocate 128KiB of staging buffer.
 	var buf = make([]byte, readSizeV1)

xl-v1-metadata_test.go

@@ -31,11 +31,11 @@ func TestXLMetaV1(t *testing.T) {
 		size     int64
 		index    int
 	}{
-		{5, "object5", "etag5", fiveMB + 5, 3},
-		{4, "object4", "etag4", fiveMB + 4, 2},
-		{7, "object7", "etag7", fiveMB + 7, 4},
-		{2, "object2", "etag2", fiveMB + 2, 1},
-		{1, "object1", "etag1", fiveMB + 1, 0},
+		{5, "part.5", "etag5", fiveMB + 5, 3},
+		{4, "part.4", "etag4", fiveMB + 4, 2},
+		{7, "part.7", "etag7", fiveMB + 7, 4},
+		{2, "part.2", "etag2", fiveMB + 2, 1},
+		{1, "part.1", "etag1", fiveMB + 1, 0},
 	}
 
 	// Create a XLMetaV1 structure to test on.

xl-v1-multipart.go

@@ -334,7 +334,7 @@ func (xl xlObjects) putObjectPart(bucket string, object string, uploadID string,
 	// Pick one from the first valid metadata.
 	xlMeta := pickValidXLMeta(partsMetadata)
 
-	partSuffix := fmt.Sprintf("object%d", partID)
+	partSuffix := fmt.Sprintf("part.%d", partID)
 	tmpPartPath := path.Join(tmpMetaPrefix, uploadID, partSuffix)
 
 	// Initialize md5 writer.
@@ -612,7 +612,7 @@ func (xl xlObjects) CompleteMultipartUpload(bucket string, object string, upload
 			Number: part.PartNumber,
 			ETag:   part.ETag,
 			Size:   currentXLMeta.Parts[partIdx].Size,
-			Name:   fmt.Sprintf("object%d", part.PartNumber),
+			Name:   fmt.Sprintf("part.%d", part.PartNumber),
 		}
 	}
 

xl-v1-object.go

@@ -304,7 +304,7 @@ func (xl xlObjects) PutObject(bucket string, object string, size int64, data io.
 	defer nsMutex.Unlock(bucket, object)
 
 	uniqueID := getUUID()
-	tempErasureObj := path.Join(tmpMetaPrefix, uniqueID, "object1")
+	tempErasureObj := path.Join(tmpMetaPrefix, uniqueID, "part.1")
 	tempObj := path.Join(tmpMetaPrefix, uniqueID)
 
 	// Initialize xl meta.
@@ -342,7 +342,7 @@ func (xl xlObjects) PutObject(bucket string, object string, size int64, data io.
 	}
 
 	// Erasure code and write across all disks.
-	newEInfos, n, err := erasureCreateFile(onlineDisks, minioMetaBucket, tempErasureObj, "object1", teeReader, eInfos, xl.writeQuorum)
+	newEInfos, n, err := erasureCreateFile(onlineDisks, minioMetaBucket, tempErasureObj, "part.1", teeReader, eInfos, xl.writeQuorum)
 	if err != nil {
 		return "", toObjectErr(err, minioMetaBucket, tempErasureObj)
 	}
@@ -399,7 +399,7 @@ func (xl xlObjects) PutObject(bucket string, object string, size int64, data io.
 	xlMeta.Stat.ModTime = modTime
 	xlMeta.Stat.Version = higherVersion
 	// Add the final part.
-	xlMeta.AddObjectPart(1, "object1", newMD5Hex, xlMeta.Stat.Size)
+	xlMeta.AddObjectPart(1, "part.1", newMD5Hex, xlMeta.Stat.Size)
 
 	// Update `xl.json` content on each disks.
 	for index := range partsMetadata {