distribute index files to all volume servers that will have shards mounted, not just one

weed/worker/tasks/ec_vacuum/ec_vacuum_task.go

@@ -598,25 +598,16 @@ func (t *EcVacuumTask) distributeNewEcShards() error {
 
 	targetBaseFileName := filepath.Join(t.tempDir, fmt.Sprintf("%s_%d_g%d", t.collection, t.volumeID, t.targetGeneration))
 
-	// Step 1: Find best server for shared index files (.vif, .ecj, .ecx)
-	var indexServer pb.ServerAddress
-	for serverAddr := range t.sourceNodes {
-		// Use the first server as index server
-		// Future enhancement: Query volume server capabilities to find servers with dedicated index folders
-		// This could be done via a new gRPC call or by checking server configuration
-		indexServer = serverAddr
-		break
-	}
-
-	// Step 2: Distribute index files (.vif, .ecj, .ecx) to index server only (shared files)
-	if indexServer != "" {
-		err := t.distributeIndexFiles(indexServer, targetBaseFileName)
+	// Step 1: Distribute index files (.vif, .ecj, .ecx) to all volume servers that will have shards
+	// Each volume server needs its own copy of index files for mounting
+	for targetNode := range t.sourceNodes {
+		err := t.distributeIndexFiles(targetNode, targetBaseFileName)
 		if err != nil {
-			return fmt.Errorf("failed to distribute index files to %s: %w", indexServer, err)
+			return fmt.Errorf("failed to distribute index files to %s: %w", targetNode, err)
 		}
 	}
 
-	// Step 3: Distribute shard files (.ec00-.ec13) to appropriate volume servers
+	// Step 2: Distribute shard files (.ec00-.ec13) to appropriate volume servers
 	for targetNode, originalShardBits := range t.sourceNodes {
 		if originalShardBits.ShardIdCount() == 0 {
 			continue
@@ -634,7 +625,7 @@ func (t *EcVacuumTask) distributeNewEcShards() error {
 			return fmt.Errorf("failed to distribute shards to %s: %w", targetNode, err)
 		}
 
-		// Step 4: Mount the new shards on the target volume server
+		// Step 3: Mount the new shards on the target volume server
 		err = operation.WithVolumeServerClient(false, targetNode, t.grpcDialOption, func(client volume_server_pb.VolumeServerClient) error {
 			_, mountErr := client.VolumeEcShardsMount(context.Background(), &volume_server_pb.VolumeEcShardsMountRequest{
 				VolumeId:   t.volumeID,
@@ -656,7 +647,6 @@ func (t *EcVacuumTask) distributeNewEcShards() error {
 	t.LogInfo("Successfully distributed all new EC shards", map[string]interface{}{
 		"volume_id":         t.volumeID,
 		"target_generation": t.targetGeneration,
-		"index_server":      indexServer,
 		"shard_servers":     len(t.sourceNodes),
 	})