diff --git a/cmd/querynode/querynode.go b/cmd/querynode/querynode.go
index e87574a5f7..9bb89c7ef0 100644
--- a/cmd/querynode/querynode.go
+++ b/cmd/querynode/querynode.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/cmd/queryservice/queryservice.go b/cmd/queryservice/queryservice.go
index f548fe7cd9..a3637dca30 100644
--- a/cmd/queryservice/queryservice.go
+++ b/cmd/queryservice/queryservice.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/distributed/querynode/client/client.go b/internal/distributed/querynode/client/client.go
index 802edcffce..88d8101dbe 100644
--- a/internal/distributed/querynode/client/client.go
+++ b/internal/distributed/querynode/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 grpcquerynodeclient
 
 import (
diff --git a/internal/distributed/querynode/mock.go b/internal/distributed/querynode/mock.go
index 44462499b4..2f1b4d515f 100644
--- a/internal/distributed/querynode/mock.go
+++ b/internal/distributed/querynode/mock.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 grpcquerynode
 
 import (
diff --git a/internal/distributed/querynode/param_table.go b/internal/distributed/querynode/param_table.go
index 0100021e40..bec1848416 100644
--- a/internal/distributed/querynode/param_table.go
+++ b/internal/distributed/querynode/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 grpcquerynode
 
 import (
diff --git a/internal/distributed/querynode/param_table_test.go b/internal/distributed/querynode/param_table_test.go
index ff36ffae65..29135c20f8 100644
--- a/internal/distributed/querynode/param_table_test.go
+++ b/internal/distributed/querynode/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 grpcquerynode
 
 import (
diff --git a/internal/distributed/querynode/service.go b/internal/distributed/querynode/service.go
index 8d557a6e06..2f2f134856 100644
--- a/internal/distributed/querynode/service.go
+++ b/internal/distributed/querynode/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 grpcquerynode
 
 import (
diff --git a/internal/distributed/queryservice/client/binlog_test.go b/internal/distributed/queryservice/client/binlog_test.go
index 28901eb5b8..95458d8574 100644
--- a/internal/distributed/queryservice/client/binlog_test.go
+++ b/internal/distributed/queryservice/client/binlog_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 grpcqueryserviceclient
 
 //import (
diff --git a/internal/distributed/queryservice/client/client.go b/internal/distributed/queryservice/client/client.go
index cd6af22741..983c166028 100644
--- a/internal/distributed/queryservice/client/client.go
+++ b/internal/distributed/queryservice/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 grpcqueryserviceclient
 
 import (
diff --git a/internal/distributed/queryservice/client/client_test.go b/internal/distributed/queryservice/client/client_test.go
index 1ac77ed233..9b2c58e146 100644
--- a/internal/distributed/queryservice/client/client_test.go
+++ b/internal/distributed/queryservice/client/client_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 grpcqueryserviceclient
 
 //import (
diff --git a/internal/distributed/queryservice/param_table.go b/internal/distributed/queryservice/param_table.go
index 2520f079a5..2c38eda2f0 100644
--- a/internal/distributed/queryservice/param_table.go
+++ b/internal/distributed/queryservice/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 grpcqueryservice
 
 import (
diff --git a/internal/distributed/queryservice/param_table_test.go b/internal/distributed/queryservice/param_table_test.go
index 4b5d014595..213f307b97 100644
--- a/internal/distributed/queryservice/param_table_test.go
+++ b/internal/distributed/queryservice/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 grpcqueryservice
 
 import (
diff --git a/internal/distributed/queryservice/service.go b/internal/distributed/queryservice/service.go
index 626e82343a..4c484c939d 100644
--- a/internal/distributed/queryservice/service.go
+++ b/internal/distributed/queryservice/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 grpcqueryservice
 
 import (
diff --git a/internal/querynode/collection.go b/internal/querynode/collection.go
index a3be14ecfa..c01287ab06 100644
--- a/internal/querynode/collection.go
+++ b/internal/querynode/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 querynode
 
 /*
diff --git a/internal/querynode/collection_replica.go b/internal/querynode/collection_replica.go
index 06bfca4b0b..1379035006 100644
--- a/internal/querynode/collection_replica.go
+++ b/internal/querynode/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 querynode
 
 /*
diff --git a/internal/querynode/collection_replica_test.go b/internal/querynode/collection_replica_test.go
index 8650caf029..11514b463a 100644
--- a/internal/querynode/collection_replica_test.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/collection_test.go b/internal/querynode/collection_test.go
index bc624b989c..063e204bad 100644
--- a/internal/querynode/collection_test.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/data_sync_service.go b/internal/querynode/data_sync_service.go
index 24c65df271..7aa9fb5960 100644
--- a/internal/querynode/data_sync_service.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/data_sync_service_test.go b/internal/querynode/data_sync_service_test.go
index 97a09f4ddc..2275323531 100644
--- a/internal/querynode/data_sync_service_test.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/error_msg.go b/internal/querynode/error_msg.go
index 7b6dddc6d5..5fe8a8abe6 100644
--- a/internal/querynode/error_msg.go
+++ b/internal/querynode/error_msg.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 querynode
 
 /*
diff --git a/internal/querynode/flow_graph_dd_node.go b/internal/querynode/flow_graph_dd_node.go
index d65f05a8f2..de9f80ae01 100644
--- a/internal/querynode/flow_graph_dd_node.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/flow_graph_delete_node.go b/internal/querynode/flow_graph_delete_node.go
index 77b26d2f14..c44f99656f 100644
--- a/internal/querynode/flow_graph_delete_node.go
+++ b/internal/querynode/flow_graph_delete_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 querynode
 
 type deleteNode struct {
diff --git a/internal/querynode/flow_graph_filter_dm_node.go b/internal/querynode/flow_graph_filter_dm_node.go
index c4106323f6..10725a3af7 100644
--- a/internal/querynode/flow_graph_filter_dm_node.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/flow_graph_gc_node.go b/internal/querynode/flow_graph_gc_node.go
index 587ab416b6..0823cb8353 100644
--- a/internal/querynode/flow_graph_gc_node.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/flow_graph_insert_node.go b/internal/querynode/flow_graph_insert_node.go
index 60e2668c00..bfd8a25b7e 100644
--- a/internal/querynode/flow_graph_insert_node.go
+++ b/internal/querynode/flow_graph_insert_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 querynode
 
 import (
diff --git a/internal/querynode/flow_graph_key2seg_node.go b/internal/querynode/flow_graph_key2seg_node.go
index c4f345a5ec..20fbe4b6f5 100644
--- a/internal/querynode/flow_graph_key2seg_node.go
+++ b/internal/querynode/flow_graph_key2seg_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 querynode
 
 type key2SegNode struct {
diff --git a/internal/querynode/flow_graph_message.go b/internal/querynode/flow_graph_message.go
index c0f84777a2..e745261d46 100644
--- a/internal/querynode/flow_graph_message.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/flow_graph_msg_stream_input_nodes.go b/internal/querynode/flow_graph_msg_stream_input_nodes.go
index aef31eb97a..ed66aa2b9c 100644
--- a/internal/querynode/flow_graph_msg_stream_input_nodes.go
+++ b/internal/querynode/flow_graph_msg_stream_input_nodes.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 querynode
 
 import (
diff --git a/internal/querynode/flow_graph_node.go b/internal/querynode/flow_graph_node.go
index e8a10b3cb7..15fdc0fa8a 100644
--- a/internal/querynode/flow_graph_node.go
+++ b/internal/querynode/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 querynode
 
 import "github.com/zilliztech/milvus-distributed/internal/util/flowgraph"
diff --git a/internal/querynode/flow_graph_service_time_node.go b/internal/querynode/flow_graph_service_time_node.go
index 922fb9b1b7..d28d158195 100644
--- a/internal/querynode/flow_graph_service_time_node.go
+++ b/internal/querynode/flow_graph_service_time_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 querynode
 
 import (
diff --git a/internal/querynode/impl.go b/internal/querynode/impl.go
index 2b054cb89a..fff893702a 100644
--- a/internal/querynode/impl.go
+++ b/internal/querynode/impl.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 querynode
 
 import (
diff --git a/internal/querynode/index.go b/internal/querynode/index.go
index fd09c392a9..19dfe951c6 100644
--- a/internal/querynode/index.go
+++ b/internal/querynode/index.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 querynode
 
 /*
diff --git a/internal/querynode/index_info.go b/internal/querynode/index_info.go
index 8eefd4fbe6..12689b74ac 100644
--- a/internal/querynode/index_info.go
+++ b/internal/querynode/index_info.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 querynode
 
 type indexInfo struct {
diff --git a/internal/querynode/index_loader.go b/internal/querynode/index_loader.go
index b3644fbbfa..c21990eefe 100644
--- a/internal/querynode/index_loader.go
+++ b/internal/querynode/index_loader.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 querynode
 
 import (
diff --git a/internal/querynode/load_index_info.go b/internal/querynode/load_index_info.go
index e38fb6bd5b..6cc9292ce2 100644
--- a/internal/querynode/load_index_info.go
+++ b/internal/querynode/load_index_info.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 querynode
 
 /*
diff --git a/internal/querynode/load_index_info_test.go b/internal/querynode/load_index_info_test.go
index 9cfd4f14a9..7ed08f1f2d 100644
--- a/internal/querynode/load_index_info_test.go
+++ b/internal/querynode/load_index_info_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 querynode
 
 import (
diff --git a/internal/querynode/load_service.go b/internal/querynode/load_service.go
index 66f42aa8dc..e53cfe7f0c 100644
--- a/internal/querynode/load_service.go
+++ b/internal/querynode/load_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 querynode
 
 import (
diff --git a/internal/querynode/load_service_test.go b/internal/querynode/load_service_test.go
index cf0fecc8f1..8aa888b52b 100644
--- a/internal/querynode/load_service_test.go
+++ b/internal/querynode/load_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 querynode
 
 import (
diff --git a/internal/querynode/meta_service.go b/internal/querynode/meta_service.go
index 069ca2afbc..f0f0b83dbe 100644
--- a/internal/querynode/meta_service.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/meta_service_test.go b/internal/querynode/meta_service_test.go
index ac41d9f625..b10e019cf3 100644
--- a/internal/querynode/meta_service_test.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/param_table.go b/internal/querynode/param_table.go
index 4f7e5be628..4acbcf0844 100644
--- a/internal/querynode/param_table.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/param_table_test.go b/internal/querynode/param_table_test.go
index 225d72bfeb..ff1e65322c 100644
--- a/internal/querynode/param_table_test.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/querynode/partition.go b/internal/querynode/partition.go
index f0f4fe74bb..9b396d810d 100644
--- a/internal/querynode/partition.go
+++ b/internal/querynode/partition.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 querynode
 
 /*
diff --git a/internal/querynode/partition_test.go b/internal/querynode/partition_test.go
index 9748afda23..69d6f8bb68 100644
--- a/internal/querynode/partition_test.go
+++ b/internal/querynode/partition_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 querynode
 
 import (
diff --git a/internal/querynode/plan.go b/internal/querynode/plan.go
index c65d683801..dfcb343e9f 100644
--- a/internal/querynode/plan.go
+++ b/internal/querynode/plan.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 querynode
 
 /*
diff --git a/internal/querynode/plan_test.go b/internal/querynode/plan_test.go
index 0484e5e198..bb09c00c6d 100644
--- a/internal/querynode/plan_test.go
+++ b/internal/querynode/plan_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 querynode
 
 import (
diff --git a/internal/querynode/query_node.go b/internal/querynode/query_node.go
index 131aec32ea..4ac0f686be 100644
--- a/internal/querynode/query_node.go
+++ b/internal/querynode/query_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 querynode
 
 /*
diff --git a/internal/querynode/query_node_test.go b/internal/querynode/query_node_test.go
index 85d0457b63..84829aca71 100644
--- a/internal/querynode/query_node_test.go
+++ b/internal/querynode/query_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 querynode
 
 import (
diff --git a/internal/querynode/reduce.go b/internal/querynode/reduce.go
index 33cd030769..402437b85c 100644
--- a/internal/querynode/reduce.go
+++ b/internal/querynode/reduce.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 querynode
 
 /*
diff --git a/internal/querynode/reduce_test.go b/internal/querynode/reduce_test.go
index 79d0425c26..9cb724f08c 100644
--- a/internal/querynode/reduce_test.go
+++ b/internal/querynode/reduce_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 querynode
 
 import (
diff --git a/internal/querynode/search_collection.go b/internal/querynode/search_collection.go
index fb4f0422d5..24c770609d 100644
--- a/internal/querynode/search_collection.go
+++ b/internal/querynode/search_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 querynode
 
 import (
diff --git a/internal/querynode/search_service.go b/internal/querynode/search_service.go
index 855e35d543..a7c54f1890 100644
--- a/internal/querynode/search_service.go
+++ b/internal/querynode/search_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 querynode
 
 import "C"
diff --git a/internal/querynode/search_service_test.go b/internal/querynode/search_service_test.go
index 9df6aa9b49..e1747beda1 100644
--- a/internal/querynode/search_service_test.go
+++ b/internal/querynode/search_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 querynode
 
 import (
diff --git a/internal/querynode/segment.go b/internal/querynode/segment.go
index e76dd805a5..3567e492d4 100644
--- a/internal/querynode/segment.go
+++ b/internal/querynode/segment.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 querynode
 
 /*
diff --git a/internal/querynode/segment_loader.go b/internal/querynode/segment_loader.go
index 2d64d29a86..2ad1a41823 100644
--- a/internal/querynode/segment_loader.go
+++ b/internal/querynode/segment_loader.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 querynode
 
 import (
diff --git a/internal/querynode/segment_test.go b/internal/querynode/segment_test.go
index 0f4518d258..3a486147ba 100644
--- a/internal/querynode/segment_test.go
+++ b/internal/querynode/segment_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 querynode
 
 import (
diff --git a/internal/querynode/stats_service.go b/internal/querynode/stats_service.go
index f98c6b25bf..0e4794fadd 100644
--- a/internal/querynode/stats_service.go
+++ b/internal/querynode/stats_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 querynode
 
 import (
diff --git a/internal/querynode/stats_service_test.go b/internal/querynode/stats_service_test.go
index 9068abe739..8ee6efd648 100644
--- a/internal/querynode/stats_service_test.go
+++ b/internal/querynode/stats_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 querynode
 
 import (
diff --git a/internal/querynode/task.go b/internal/querynode/task.go
index 28f0ae1843..2d988b7220 100644
--- a/internal/querynode/task.go
+++ b/internal/querynode/task.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 querynode
 
 import (
diff --git a/internal/querynode/task_queue.go b/internal/querynode/task_queue.go
index e90ee2f2fc..c6fc1f04f8 100644
--- a/internal/querynode/task_queue.go
+++ b/internal/querynode/task_queue.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 querynode
 
 import (
diff --git a/internal/querynode/task_scheduler.go b/internal/querynode/task_scheduler.go
index 7efb97d222..1336c20bea 100644
--- a/internal/querynode/task_scheduler.go
+++ b/internal/querynode/task_scheduler.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 querynode
 
 import (
diff --git a/internal/querynode/tsafe.go b/internal/querynode/tsafe.go
index e8e0ee537d..8cf9c76639 100644
--- a/internal/querynode/tsafe.go
+++ b/internal/querynode/tsafe.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 querynode
 
 import (
diff --git a/internal/querynode/tsafe_test.go b/internal/querynode/tsafe_test.go
index 1ae166f7f7..42b97c645c 100644
--- a/internal/querynode/tsafe_test.go
+++ b/internal/querynode/tsafe_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 querynode
 
 import (
diff --git a/internal/querynode/type_def.go b/internal/querynode/type_def.go
index 25ed8034b4..ce77fbae77 100644
--- a/internal/querynode/type_def.go
+++ b/internal/querynode/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 querynode
 
 import (
diff --git a/internal/queryservice/condition.go b/internal/queryservice/condition.go
index 7bf2ce311d..1c3bdca213 100644
--- a/internal/queryservice/condition.go
+++ b/internal/queryservice/condition.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 queryservice
 
 import (
diff --git a/internal/queryservice/impl.go b/internal/queryservice/impl.go
index 16d6e5dccd..ce65310587 100644
--- a/internal/queryservice/impl.go
+++ b/internal/queryservice/impl.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 queryservice
 
 import (
diff --git a/internal/queryservice/meta_replica.go b/internal/queryservice/meta_replica.go
index b70211cb9d..c957a1f1be 100644
--- a/internal/queryservice/meta_replica.go
+++ b/internal/queryservice/meta_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 queryservice
 
 import (
diff --git a/internal/queryservice/meta_replica_test.go b/internal/queryservice/meta_replica_test.go
index 0b6d65fbd0..2aae8d3d87 100644
--- a/internal/queryservice/meta_replica_test.go
+++ b/internal/queryservice/meta_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 queryservice
 
 import (
diff --git a/internal/queryservice/mock.go b/internal/queryservice/mock.go
index 2043930351..dda36be988 100644
--- a/internal/queryservice/mock.go
+++ b/internal/queryservice/mock.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 queryservice
 
 import (
diff --git a/internal/queryservice/param_table.go b/internal/queryservice/param_table.go
index bca1f2bd66..604a4647d4 100644
--- a/internal/queryservice/param_table.go
+++ b/internal/queryservice/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 queryservice
 
 import (
diff --git a/internal/queryservice/querynode.go b/internal/queryservice/querynode.go
index df44038847..6456490784 100644
--- a/internal/queryservice/querynode.go
+++ b/internal/queryservice/querynode.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 queryservice
 
 import (
diff --git a/internal/queryservice/queryservice.go b/internal/queryservice/queryservice.go
index 41241ddd97..0c028ba725 100644
--- a/internal/queryservice/queryservice.go
+++ b/internal/queryservice/queryservice.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 queryservice
 
 import (
diff --git a/internal/queryservice/queryservice_test.go b/internal/queryservice/queryservice_test.go
index e5f7c06702..9bc237e6be 100644
--- a/internal/queryservice/queryservice_test.go
+++ b/internal/queryservice/queryservice_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 queryservice
 
 import (
diff --git a/internal/queryservice/task.go b/internal/queryservice/task.go
index 70897a6b7e..12e9bd2ff2 100644
--- a/internal/queryservice/task.go
+++ b/internal/queryservice/task.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 queryservice
 
 import (
diff --git a/internal/queryservice/task_scheduler.go b/internal/queryservice/task_scheduler.go
index 99048b131a..41051e5854 100644
--- a/internal/queryservice/task_scheduler.go
+++ b/internal/queryservice/task_scheduler.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 queryservice
 
 import (