Parallelize initialization of storageDisks (#8288)

cmd/format-xl.go

@@ -677,34 +677,22 @@ func closeStorageDisks(storageDisks []StorageAPI) {
 	}
 }
 
-// Initialize storage disks based on input arguments.
-func initStorageDisks(endpoints EndpointList) ([]StorageAPI, error) {
+// Initialize storage disks for each endpoint.
+// Errors are returned for each endpoint with matching index.
+func initStorageDisksWithErrors(endpoints EndpointList) ([]StorageAPI, []error) {
 	// Bootstrap disks.
 	storageDisks := make([]StorageAPI, len(endpoints))
+	errs := make([]error, len(endpoints))
+	var wg sync.WaitGroup
 	for index, endpoint := range endpoints {
-		storage, err := newStorageAPI(endpoint)
-		if err != nil && err != errDiskNotFound {
-			return nil, err
-		}
-		storageDisks[index] = storage
+		wg.Add(1)
+		go func(index int, endpoint Endpoint) {
+			defer wg.Done()
+			storageDisks[index], errs[index] = newStorageAPI(endpoint)
+		}(index, endpoint)
 	}
-	return storageDisks, nil
-}
-
-// Runs through the faulty disks and record their errors.
-func initDisksWithErrors(endpoints EndpointList) ([]StorageAPI, []error) {
-	storageDisks := make([]StorageAPI, len(endpoints))
-	var dErrs = make([]error, len(storageDisks))
-	for index, endpoint := range endpoints {
-		storage, err := newStorageAPI(endpoint)
-		if err != nil {
-			logger.LogIf(context.Background(), err)
-			dErrs[index] = err
-			continue
-		}
-		storageDisks[index] = storage
-	}
-	return storageDisks, dErrs
+	wg.Wait()
+	return storageDisks, errs
 }
 
 // formatXLV3ThisEmpty - find out if '.This' field is empty