diff --git a/cmd/datanode/main.go b/cmd/datanode/main.go
index 51761fa865..d05153bdd9 100644
--- a/cmd/datanode/main.go
+++ b/cmd/datanode/main.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package main
 
 import (
diff --git a/internal/datanode/allocator.go b/internal/datanode/allocator.go
index 90bb4d04a8..97971568bf 100644
--- a/internal/datanode/allocator.go
+++ b/internal/datanode/allocator.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/binlog_meta.go b/internal/datanode/binlog_meta.go
index a0c83623d4..0bbc457346 100644
--- a/internal/datanode/binlog_meta.go
+++ b/internal/datanode/binlog_meta.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/binlog_meta_test.go b/internal/datanode/binlog_meta_test.go
index b460e50962..49eabf14a7 100644
--- a/internal/datanode/binlog_meta_test.go
+++ b/internal/datanode/binlog_meta_test.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/collection.go b/internal/datanode/collection.go
index ae1b1d1f5c..f0df8b76b0 100644
--- a/internal/datanode/collection.go
+++ b/internal/datanode/collection.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/collection_replica.go b/internal/datanode/collection_replica.go
index 86a66a5741..8b1c121ae5 100644
--- a/internal/datanode/collection_replica.go
+++ b/internal/datanode/collection_replica.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/collection_replica_test.go b/internal/datanode/collection_replica_test.go
index e5ebbddcb4..a4acdd92e1 100644
--- a/internal/datanode/collection_replica_test.go
+++ b/internal/datanode/collection_replica_test.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/collection_test.go b/internal/datanode/collection_test.go
index 444ec65cd9..b7cd3a69db 100644
--- a/internal/datanode/collection_test.go
+++ b/internal/datanode/collection_test.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/data_node.go b/internal/datanode/data_node.go
index d96b40bb66..58773cab80 100644
--- a/internal/datanode/data_node.go
+++ b/internal/datanode/data_node.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/data_node_test.go b/internal/datanode/data_node_test.go
index 9394e4bb87..4e8f34604a 100644
--- a/internal/datanode/data_node_test.go
+++ b/internal/datanode/data_node_test.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/data_sync_service.go b/internal/datanode/data_sync_service.go
index 2c1c7309ca..7017c126ee 100644
--- a/internal/datanode/data_sync_service.go
+++ b/internal/datanode/data_sync_service.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/data_sync_service_test.go b/internal/datanode/data_sync_service_test.go
index a6f469052a..819aa4d7c6 100644
--- a/internal/datanode/data_sync_service_test.go
+++ b/internal/datanode/data_sync_service_test.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/flow_graph_dd_node.go b/internal/datanode/flow_graph_dd_node.go
index 3b192b8c05..0cde20d59b 100644
--- a/internal/datanode/flow_graph_dd_node.go
+++ b/internal/datanode/flow_graph_dd_node.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/flow_graph_dd_node_test.go b/internal/datanode/flow_graph_dd_node_test.go
index 94f8063253..4010633243 100644
--- a/internal/datanode/flow_graph_dd_node_test.go
+++ b/internal/datanode/flow_graph_dd_node_test.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/flow_graph_filter_dm_node.go b/internal/datanode/flow_graph_filter_dm_node.go
index fe33458f26..9a08e7d843 100644
--- a/internal/datanode/flow_graph_filter_dm_node.go
+++ b/internal/datanode/flow_graph_filter_dm_node.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/flow_graph_gc_node.go b/internal/datanode/flow_graph_gc_node.go
index 571de3ddcb..cdd5426e92 100644
--- a/internal/datanode/flow_graph_gc_node.go
+++ b/internal/datanode/flow_graph_gc_node.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/flow_graph_insert_buffer_node.go b/internal/datanode/flow_graph_insert_buffer_node.go
index b3e5cd9300..249d2c64c8 100644
--- a/internal/datanode/flow_graph_insert_buffer_node.go
+++ b/internal/datanode/flow_graph_insert_buffer_node.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/flow_graph_insert_buffer_node_test.go b/internal/datanode/flow_graph_insert_buffer_node_test.go
index 14f69f250b..d35ac3fac2 100644
--- a/internal/datanode/flow_graph_insert_buffer_node_test.go
+++ b/internal/datanode/flow_graph_insert_buffer_node_test.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/flow_graph_message.go b/internal/datanode/flow_graph_message.go
index 0e9d33d43f..f36a80df89 100644
--- a/internal/datanode/flow_graph_message.go
+++ b/internal/datanode/flow_graph_message.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/flow_graph_msg_stream_input_node.go b/internal/datanode/flow_graph_msg_stream_input_node.go
index b7bfd63f94..5830b02c9b 100644
--- a/internal/datanode/flow_graph_msg_stream_input_node.go
+++ b/internal/datanode/flow_graph_msg_stream_input_node.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/flow_graph_node.go b/internal/datanode/flow_graph_node.go
index 24845d3e34..6f875781db 100644
--- a/internal/datanode/flow_graph_node.go
+++ b/internal/datanode/flow_graph_node.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import "github.com/zilliztech/milvus-distributed/internal/util/flowgraph"
diff --git a/internal/datanode/meta_service.go b/internal/datanode/meta_service.go
index 04bcc2cafd..cafae1782f 100644
--- a/internal/datanode/meta_service.go
+++ b/internal/datanode/meta_service.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/meta_service_test.go b/internal/datanode/meta_service_test.go
index 3877ead407..6fa8cd7a98 100644
--- a/internal/datanode/meta_service_test.go
+++ b/internal/datanode/meta_service_test.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/param_table.go b/internal/datanode/param_table.go
index 455bac68a9..f2af0f9a77 100644
--- a/internal/datanode/param_table.go
+++ b/internal/datanode/param_table.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/param_table_test.go b/internal/datanode/param_table_test.go
index 1fe8cbce59..4b6ec90221 100644
--- a/internal/datanode/param_table_test.go
+++ b/internal/datanode/param_table_test.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import (
diff --git a/internal/datanode/type_def.go b/internal/datanode/type_def.go
index 4cea67e9b7..ff44d19d7b 100644
--- a/internal/datanode/type_def.go
+++ b/internal/datanode/type_def.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datanode
 
 import "github.com/zilliztech/milvus-distributed/internal/util/typeutil"
diff --git a/internal/distributed/datanode/client/client.go b/internal/distributed/datanode/client/client.go
index 94ce59a931..ef9a9c63a1 100644
--- a/internal/distributed/datanode/client/client.go
+++ b/internal/distributed/datanode/client/client.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package grpcdatanodeclient
 
 import (
diff --git a/internal/distributed/datanode/param_table.go b/internal/distributed/datanode/param_table.go
index 863c59cae0..dc1de2be3b 100644
--- a/internal/distributed/datanode/param_table.go
+++ b/internal/distributed/datanode/param_table.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package grpcdatanode
 
 import (
diff --git a/internal/distributed/datanode/param_table_test.go b/internal/distributed/datanode/param_table_test.go
index 1b32758f17..694bacc7a0 100644
--- a/internal/distributed/datanode/param_table_test.go
+++ b/internal/distributed/datanode/param_table_test.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package grpcdatanode
 
 import (
diff --git a/internal/distributed/datanode/service.go b/internal/distributed/datanode/service.go
index 174e192a50..44c2dd687e 100644
--- a/internal/distributed/datanode/service.go
+++ b/internal/distributed/datanode/service.go
@@ -1,3 +1,14 @@
+// Copyright (C) 2019-2020 Zilliz. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software distributed under the License
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package grpcdatanode
 
 import (