Enhance ID allocator in DataNode (#22905)

Signed-off-by: yangxuan <xuan.yang@zilliz.com>

Makefile

@@ -347,6 +347,8 @@ mock-tnx-kv:
 	mockery --name=TxnKV --dir=$(PWD)/internal/kv --output=$(PWD)/internal/kv/mocks --filename=TxnKV.go --with-expecter
 
 generate-mockery: getdeps
+	# internal/datanode
+	$(PWD)/bin/mockery --name=Allocator --dir=$(PWD)/internal/datanode/allocator/ --output=$(PWD)/internal/datanode/allocator --filename=mock_allocator.go --with-expecter --structname=MockAllocator  --outpkg=allocator --inpackage
 	# internal/querycoordv2
 	$(PWD)/bin/mockery --name=QueryNodeServer --dir=$(PWD)/internal/proto/querypb/ --output=$(PWD)/internal/querycoordv2/mocks --filename=mock_querynode.go --with-expecter --structname=MockQueryNodeServer 
 	$(PWD)/bin/mockery --name=Broker --dir=$(PWD)/internal/querycoordv2/meta --output=$(PWD)/internal/querycoordv2/meta --filename=mock_broker.go --with-expecter --structname=MockBroker --outpkg=meta 

internal/allocator/id_allocator.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/cockroachdb/errors"
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
 	"github.com/milvus-io/milvus/internal/proto/rootcoordpb"
 	"github.com/milvus-io/milvus/internal/util/commonpbutil"
@@ -151,6 +152,9 @@ func (ia *IDAllocator) AllocOne() (UniqueID, error) {
 
 // Alloc allocates the id of the count number.
 func (ia *IDAllocator) Alloc(count uint32) (UniqueID, UniqueID, error) {
+	if ia.closed() {
+		return 0, 0, errors.New("fail to allocate ID, closed allocator")
+	}
 	req := &IDRequest{BaseRequest: BaseRequest{Done: make(chan error), Valid: false}}
 
 	req.count = count
@@ -162,3 +166,13 @@ func (ia *IDAllocator) Alloc(count uint32) (UniqueID, UniqueID, error) {
 	start, count := req.id, req.count
 	return start, start + int64(count), nil
 }
+
+// preventing alloc from a closed allocator stucking forever
+func (ia *IDAllocator) closed() bool {
+	select {
+	case <-ia.Ctx.Done():
+		return true
+	default:
+		return false
+	}
+}

internal/allocator/id_allocator_test.go

@@ -23,6 +23,7 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
 	"github.com/milvus-io/milvus/internal/proto/rootcoordpb"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 type mockIDAllocator struct {
@@ -65,3 +66,16 @@ func TestIDAllocator(t *testing.T) {
 	assert.Nil(t, err)
 	assert.Equal(t, id, int64(20002))
 }
+
+func TestIDAllocatorClose(t *testing.T) {
+	a, err := NewIDAllocator(context.TODO(), newMockIDAllocator(), 1)
+	require.NoError(t, err)
+
+	err = a.Start()
+	assert.NoError(t, err)
+
+	a.Close()
+
+	_, _, err = a.Alloc(10)
+	assert.Error(t, err)
+}

internal/datanode/allocator.go

@@ -1,104 +0,0 @@
-// Licensed to the LF AI & Data foundation under one
-// or more contributor license agreements. See the NOTICE file
-// distributed with this work for additional information
-// regarding copyright ownership. The ASF licenses this file
-// to you 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 (
-	"context"
-
-	"github.com/cockroachdb/errors"
-
-	"github.com/milvus-io/milvus/internal/util/commonpbutil"
-	"github.com/milvus-io/milvus/internal/util/metautil"
-	"github.com/milvus-io/milvus/internal/util/paramtable"
-
-	"github.com/milvus-io/milvus-proto/go-api/commonpb"
-	"github.com/milvus-io/milvus/internal/proto/rootcoordpb"
-	"github.com/milvus-io/milvus/internal/types"
-)
-
-type allocatorInterface interface {
-	allocID() (UniqueID, error)
-	allocIDBatch(count uint32) (UniqueID, uint32, error)
-	genKey(ids ...UniqueID) (key string, err error)
-}
-
-type allocator struct {
-	rootCoord types.RootCoord
-}
-
-// check if allocator implements allocatorInterface
-var _ allocatorInterface = &allocator{}
-
-func newAllocator(s types.RootCoord) *allocator {
-	return &allocator{
-		rootCoord: s,
-	}
-}
-
-// allocID allocates one ID from rootCoord
-func (alloc *allocator) allocID() (UniqueID, error) {
-	ctx := context.TODO()
-	resp, err := alloc.rootCoord.AllocID(ctx, &rootcoordpb.AllocIDRequest{
-		Base: commonpbutil.NewMsgBase(
-			commonpbutil.WithMsgType(commonpb.MsgType_RequestID),
-			commonpbutil.WithMsgID(1), // GOOSE TODO
-			commonpbutil.WithSourceID(paramtable.GetNodeID()),
-		),
-		Count: 1,
-	})
-	if err != nil {
-		return 0, err
-	}
-
-	if resp.GetStatus().GetErrorCode() != commonpb.ErrorCode_Success {
-		return 0, errors.New(resp.GetStatus().GetReason())
-	}
-
-	return resp.ID, nil
-}
-
-// allocIDBatch allocates IDs in batch from rootCoord
-func (alloc *allocator) allocIDBatch(count uint32) (UniqueID, uint32, error) {
-	ctx := context.Background()
-	resp, err := alloc.rootCoord.AllocID(ctx, &rootcoordpb.AllocIDRequest{
-		Base: commonpbutil.NewMsgBase(
-			commonpbutil.WithMsgType(commonpb.MsgType_RequestID),
-			commonpbutil.WithSourceID(paramtable.GetNodeID()),
-		),
-		Count: count,
-	})
-
-	if err != nil {
-		return 0, 0, err
-	}
-
-	if resp.GetStatus().GetErrorCode() != commonpb.ErrorCode_Success {
-		return 0, 0, errors.New(resp.GetStatus().GetReason())
-	}
-
-	return resp.GetID(), resp.GetCount(), nil
-}
-
-// genKey gives a valid key string for lists of UniqueIDs:
-func (alloc *allocator) genKey(ids ...UniqueID) (string, error) {
-	idx, err := alloc.allocID()
-	if err != nil {
-		return "", err
-	}
-	ids = append(ids, idx)
-	return metautil.JoinIDPath(ids...), nil
-}

internal/datanode/allocator/allocator.go

@@ -0,0 +1,81 @@
+// Licensed to the LF AI & Data foundation under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you 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 allocator
+
+import (
+	"context"
+
+	gAllocator "github.com/milvus-io/milvus/internal/allocator"
+	"github.com/milvus-io/milvus/internal/types"
+	"github.com/milvus-io/milvus/internal/util/typeutil"
+)
+
+type UniqueID = typeutil.UniqueID
+
+type Allocator interface {
+	Start() error
+	Close()
+	AllocOne() (UniqueID, error)
+	Alloc(count uint32) (UniqueID, UniqueID, error)
+	GetGenerator(count int, done <-chan struct{}) (<-chan UniqueID, error)
+	GetIDAlloactor() *gAllocator.IDAllocator
+}
+
+var _ Allocator = (*Impl)(nil)
+
+type Impl struct {
+	// Start() error
+	// Close() error
+	// AllocOne() (UniqueID, error)
+	// Alloc(count uint32) (UniqueID, UniqueID, error)
+	*gAllocator.IDAllocator
+}
+
+func New(ctx context.Context, rootCoord types.RootCoord, peerID UniqueID) (Allocator, error) {
+	idAlloc, err := gAllocator.NewIDAllocator(ctx, rootCoord, peerID)
+	if err != nil {
+		return nil, err
+	}
+	return &Impl{idAlloc}, nil
+}
+
+func (a *Impl) GetIDAlloactor() *gAllocator.IDAllocator {
+	return a.IDAllocator
+}
+
+func (a *Impl) GetGenerator(count int, done <-chan struct{}) (<-chan UniqueID, error) {
+
+	idStart, _, err := a.Alloc(uint32(count))
+	if err != nil {
+		return nil, err
+	}
+
+	rt := make(chan UniqueID)
+	go func(rt chan<- UniqueID) {
+		for i := 0; i < count; i++ {
+			select {
+			case <-done:
+				close(rt)
+				return
+			case rt <- idStart + UniqueID(i):
+			}
+		}
+		close(rt)
+	}(rt)
+
+	return rt, nil
+}

internal/datanode/allocator/allocator_test.go

@@ -0,0 +1,92 @@
+// Licensed to the LF AI & Data foundation under one
+// or more contributor license agreements. See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership. The ASF licenses this file
+// to you 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 allocator
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/milvus-io/milvus-proto/go-api/commonpb"
+	"github.com/milvus-io/milvus/internal/proto/rootcoordpb"
+	"github.com/milvus-io/milvus/internal/types"
+)
+
+func TestGetGenerator(t *testing.T) {
+	tests := []struct {
+		isvalid  bool
+		innumber int
+
+		expectedNo  int
+		description string
+	}{
+		{true, 1, 1, "valid input n 1"},
+		{true, 3, 3, "valid input n 3 with cancel"},
+	}
+
+	for _, test := range tests {
+		rc := &RootCoordFactory{ID: 11111}
+		alloc, err := New(context.TODO(), rc, 100)
+		require.NoError(t, err)
+		err = alloc.Start()
+		require.NoError(t, err)
+
+		t.Run(test.description, func(t *testing.T) {
+			done := make(chan struct{})
+			gen, err := alloc.GetGenerator(test.innumber, done)
+			assert.NoError(t, err)
+
+			r := make([]UniqueID, 0)
+			for i := range gen {
+				r = append(r, i)
+			}
+
+			assert.Equal(t, test.expectedNo, len(r))
+
+			if test.innumber > 1 {
+				donedone := make(chan struct{})
+				gen, err := alloc.GetGenerator(test.innumber, donedone)
+				assert.NoError(t, err)
+
+				_, ok := <-gen
+				assert.True(t, ok)
+
+				donedone <- struct{}{}
+
+				_, ok = <-gen
+				assert.False(t, ok)
+			}
+		})
+	}
+}
+
+type RootCoordFactory struct {
+	types.RootCoord
+	ID UniqueID
+}
+
+func (m *RootCoordFactory) AllocID(ctx context.Context, in *rootcoordpb.AllocIDRequest) (*rootcoordpb.AllocIDResponse, error) {
+	resp := &rootcoordpb.AllocIDResponse{
+		ID:    m.ID,
+		Count: in.GetCount(),
+		Status: &commonpb.Status{
+			ErrorCode: commonpb.ErrorCode_Success,
+		}}
+	return resp, nil
+}

internal/datanode/allocator/mock_allocator.go

@@ -0,0 +1,278 @@
+// Code generated by mockery v2.16.0. DO NOT EDIT.
+
+package allocator
+
+import (
+	internalallocator "github.com/milvus-io/milvus/internal/allocator"
+	mock "github.com/stretchr/testify/mock"
+)
+
+// MockAllocator is an autogenerated mock type for the Allocator type
+type MockAllocator struct {
+	mock.Mock
+}
+
+type MockAllocator_Expecter struct {
+	mock *mock.Mock
+}
+
+func (_m *MockAllocator) EXPECT() *MockAllocator_Expecter {
+	return &MockAllocator_Expecter{mock: &_m.Mock}
+}
+
+// Alloc provides a mock function with given fields: count
+func (_m *MockAllocator) Alloc(count uint32) (int64, int64, error) {
+	ret := _m.Called(count)
+
+	var r0 int64
+	if rf, ok := ret.Get(0).(func(uint32) int64); ok {
+		r0 = rf(count)
+	} else {
+		r0 = ret.Get(0).(int64)
+	}
+
+	var r1 int64
+	if rf, ok := ret.Get(1).(func(uint32) int64); ok {
+		r1 = rf(count)
+	} else {
+		r1 = ret.Get(1).(int64)
+	}
+
+	var r2 error
+	if rf, ok := ret.Get(2).(func(uint32) error); ok {
+		r2 = rf(count)
+	} else {
+		r2 = ret.Error(2)
+	}
+
+	return r0, r1, r2
+}
+
+// MockAllocator_Alloc_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'Alloc'
+type MockAllocator_Alloc_Call struct {
+	*mock.Call
+}
+
+// Alloc is a helper method to define mock.On call
+//  - count uint32
+func (_e *MockAllocator_Expecter) Alloc(count interface{}) *MockAllocator_Alloc_Call {
+	return &MockAllocator_Alloc_Call{Call: _e.mock.On("Alloc", count)}
+}
+
+func (_c *MockAllocator_Alloc_Call) Run(run func(count uint32)) *MockAllocator_Alloc_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(uint32))
+	})
+	return _c
+}
+
+func (_c *MockAllocator_Alloc_Call) Return(_a0 int64, _a1 int64, _a2 error) *MockAllocator_Alloc_Call {
+	_c.Call.Return(_a0, _a1, _a2)
+	return _c
+}
+
+// AllocOne provides a mock function with given fields:
+func (_m *MockAllocator) AllocOne() (int64, error) {
+	ret := _m.Called()
+
+	var r0 int64
+	if rf, ok := ret.Get(0).(func() int64); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(int64)
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func() error); ok {
+		r1 = rf()
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// MockAllocator_AllocOne_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'AllocOne'
+type MockAllocator_AllocOne_Call struct {
+	*mock.Call
+}
+
+// AllocOne is a helper method to define mock.On call
+func (_e *MockAllocator_Expecter) AllocOne() *MockAllocator_AllocOne_Call {
+	return &MockAllocator_AllocOne_Call{Call: _e.mock.On("AllocOne")}
+}
+
+func (_c *MockAllocator_AllocOne_Call) Run(run func()) *MockAllocator_AllocOne_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockAllocator_AllocOne_Call) Return(_a0 int64, _a1 error) *MockAllocator_AllocOne_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
+// Close provides a mock function with given fields:
+func (_m *MockAllocator) Close() {
+	_m.Called()
+}
+
+// MockAllocator_Close_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'Close'
+type MockAllocator_Close_Call struct {
+	*mock.Call
+}
+
+// Close is a helper method to define mock.On call
+func (_e *MockAllocator_Expecter) Close() *MockAllocator_Close_Call {
+	return &MockAllocator_Close_Call{Call: _e.mock.On("Close")}
+}
+
+func (_c *MockAllocator_Close_Call) Run(run func()) *MockAllocator_Close_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockAllocator_Close_Call) Return() *MockAllocator_Close_Call {
+	_c.Call.Return()
+	return _c
+}
+
+// GetGenerator provides a mock function with given fields: count, done
+func (_m *MockAllocator) GetGenerator(count int, done <-chan struct{}) (<-chan int64, error) {
+	ret := _m.Called(count, done)
+
+	var r0 <-chan int64
+	if rf, ok := ret.Get(0).(func(int, <-chan struct{}) <-chan int64); ok {
+		r0 = rf(count, done)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(<-chan int64)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(int, <-chan struct{}) error); ok {
+		r1 = rf(count, done)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// MockAllocator_GetGenerator_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'GetGenerator'
+type MockAllocator_GetGenerator_Call struct {
+	*mock.Call
+}
+
+// GetGenerator is a helper method to define mock.On call
+//  - count int
+//  - done <-chan struct{}
+func (_e *MockAllocator_Expecter) GetGenerator(count interface{}, done interface{}) *MockAllocator_GetGenerator_Call {
+	return &MockAllocator_GetGenerator_Call{Call: _e.mock.On("GetGenerator", count, done)}
+}
+
+func (_c *MockAllocator_GetGenerator_Call) Run(run func(count int, done <-chan struct{})) *MockAllocator_GetGenerator_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(int), args[1].(<-chan struct{}))
+	})
+	return _c
+}
+
+func (_c *MockAllocator_GetGenerator_Call) Return(_a0 <-chan int64, _a1 error) *MockAllocator_GetGenerator_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
+// GetIDAlloactor provides a mock function with given fields:
+func (_m *MockAllocator) GetIDAlloactor() *internalallocator.IDAllocator {
+	ret := _m.Called()
+
+	var r0 *internalallocator.IDAllocator
+	if rf, ok := ret.Get(0).(func() *internalallocator.IDAllocator); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*internalallocator.IDAllocator)
+		}
+	}
+
+	return r0
+}
+
+// MockAllocator_GetIDAlloactor_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'GetIDAlloactor'
+type MockAllocator_GetIDAlloactor_Call struct {
+	*mock.Call
+}
+
+// GetIDAlloactor is a helper method to define mock.On call
+func (_e *MockAllocator_Expecter) GetIDAlloactor() *MockAllocator_GetIDAlloactor_Call {
+	return &MockAllocator_GetIDAlloactor_Call{Call: _e.mock.On("GetIDAlloactor")}
+}
+
+func (_c *MockAllocator_GetIDAlloactor_Call) Run(run func()) *MockAllocator_GetIDAlloactor_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockAllocator_GetIDAlloactor_Call) Return(_a0 *internalallocator.IDAllocator) *MockAllocator_GetIDAlloactor_Call {
+	_c.Call.Return(_a0)
+	return _c
+}
+
+// Start provides a mock function with given fields:
+func (_m *MockAllocator) Start() error {
+	ret := _m.Called()
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func() error); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// MockAllocator_Start_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'Start'
+type MockAllocator_Start_Call struct {
+	*mock.Call
+}
+
+// Start is a helper method to define mock.On call
+func (_e *MockAllocator_Expecter) Start() *MockAllocator_Start_Call {
+	return &MockAllocator_Start_Call{Call: _e.mock.On("Start")}
+}
+
+func (_c *MockAllocator_Start_Call) Run(run func()) *MockAllocator_Start_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockAllocator_Start_Call) Return(_a0 error) *MockAllocator_Start_Call {
+	_c.Call.Return(_a0)
+	return _c
+}
+
+type mockConstructorTestingTNewMockAllocator interface {
+	mock.TestingT
+	Cleanup(func())
+}
+
+// NewMockAllocator creates a new instance of MockAllocator. It also registers a testing interface on the mock and a cleanup function to assert the mocks expectations.
+func NewMockAllocator(t mockConstructorTestingTNewMockAllocator) *MockAllocator {
+	mock := &MockAllocator{}
+	mock.Mock.Test(t)
+
+	t.Cleanup(func() { mock.AssertExpectations(t) })
+
+	return mock
+}

internal/datanode/allocator_test.go

@@ -1,104 +0,0 @@
-// Licensed to the LF AI & Data foundation under one
-// or more contributor license agreements. See the NOTICE file
-// distributed with this work for additional information
-// regarding copyright ownership. The ASF licenses this file
-// to you 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 (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestAllocator_Basic(t *testing.T) {
-	ms := &RootCoordFactory{}
-	allocator := newAllocator(ms)
-
-	t.Run("Test allocID", func(t *testing.T) {
-		ms.setID(666)
-		_, err := allocator.allocID()
-		assert.NoError(t, err)
-
-		ms.setID(-1)
-		_, err = allocator.allocID()
-		assert.Error(t, err)
-	})
-
-	t.Run("Test alloc ID batch", func(t *testing.T) {
-		// If id == 0, AllocID will return not successful status
-		// If id == -1, AllocID will return err with nil status
-		ms.setID(666)
-		_, count, err := allocator.allocIDBatch(10)
-		assert.NoError(t, err)
-		assert.EqualValues(t, 10, count)
-
-		ms.setID(0)
-		_, _, err = allocator.allocIDBatch(10)
-		assert.Error(t, err)
-
-		ms.setID(-1)
-		_, _, err = allocator.allocIDBatch(10)
-		assert.Error(t, err)
-	})
-
-	t.Run("Test genKey", func(t *testing.T) {
-		ms.setID(666)
-
-		type Test struct {
-			inIDs  []UniqueID
-			outKey string
-
-			description string
-		}
-
-		tests := []Test{
-			{[]UniqueID{}, "666", "genKey with empty input ids"},
-			{[]UniqueID{1}, "1/666", "genKey with 1 input id"},
-			{[]UniqueID{1, 2, 3}, "1/2/3/666", "genKey with input 3 ids"},
-			{[]UniqueID{2, 2, 2}, "2/2/2/666", "genKey with input 3 ids"},
-		}
-
-		for i, test := range tests {
-			key, err := allocator.genKey(test.inIDs...)
-			assert.NoError(t, err)
-			assert.Equalf(t, test.outKey, key, "#%d", i)
-		}
-
-		// Status.ErrorCode != Success
-		ms.setID(0)
-		tests = []Test{
-			{[]UniqueID{}, "", "error rpc status"},
-			{[]UniqueID{1}, "", "error rpc status"},
-		}
-
-		for _, test := range tests {
-			k, err := allocator.genKey(test.inIDs...)
-			assert.Error(t, err)
-			assert.Equal(t, test.outKey, k)
-		}
-
-		// Grpc error
-		ms.setID(-1)
-		tests = []Test{
-			{[]UniqueID{}, "", "error rpc"},
-			{[]UniqueID{1}, "", "error rpc"},
-		}
-		for _, test := range tests {
-			k, err := allocator.genKey(test.inIDs...)
-			assert.Error(t, err)
-			assert.Equal(t, test.outKey, k)
-		}
-	})
-}

internal/datanode/binlog_io.go

@@ -25,6 +25,7 @@ import (
 	"github.com/cockroachdb/errors"
 
 	"github.com/milvus-io/milvus/internal/common"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/etcdpb"
@@ -60,7 +61,7 @@ type uploader interface {
 
 type binlogIO struct {
 	storage.ChunkManager
-	allocatorInterface
+	allocator.Allocator
 }
 
 var _ downloader = (*binlogIO)(nil)
@@ -241,10 +242,11 @@ func (b *binlogIO) genDeltaBlobs(data *DeleteData, collID, partID, segID UniqueI
 		return "", nil, err
 	}
 
-	k, err := b.genKey(collID, partID, segID)
+	idx, err := b.AllocOne()
 	if err != nil {
 		return "", nil, err
 	}
+	k := metautil.JoinIDPath(collID, partID, segID, idx)
 
 	key := path.Join(b.ChunkManager.RootPath(), common.SegmentDeltaLogPath, k)
 
@@ -268,7 +270,7 @@ func (b *binlogIO) genInsertBlobs(data *InsertData, partID, segID UniqueID, meta
 	notifyGenIdx := make(chan struct{})
 	defer close(notifyGenIdx)
 
-	generator, err := b.idxGenerator(len(inlogs)+len(statslogs), notifyGenIdx)
+	generator, err := b.GetGenerator(len(inlogs)+len(statslogs), notifyGenIdx)
 	if err != nil {
 		return nil, nil, nil, err
 	}
@@ -309,29 +311,6 @@ func (b *binlogIO) genInsertBlobs(data *InsertData, partID, segID UniqueID, meta
 	return kvs, inpaths, statspaths, nil
 }
 
-func (b *binlogIO) idxGenerator(n int, done <-chan struct{}) (<-chan UniqueID, error) {
-
-	idStart, _, err := b.allocIDBatch(uint32(n))
-	if err != nil {
-		return nil, err
-	}
-
-	rt := make(chan UniqueID)
-	go func(rt chan<- UniqueID) {
-		for i := 0; i < n; i++ {
-			select {
-			case <-done:
-				close(rt)
-				return
-			case rt <- idStart + UniqueID(i):
-			}
-		}
-		close(rt)
-	}(rt)
-
-	return rt, nil
-}
-
 func (b *binlogIO) uploadInsertLog(
 	ctx context.Context,
 	segID UniqueID,

internal/datanode/binlog_io_test.go

@@ -18,32 +18,43 @@ package datanode
 
 import (
 	"context"
+	"fmt"
 	"path"
 	"testing"
 	"time"
 
-	"github.com/cockroachdb/errors"
-
 	"github.com/milvus-io/milvus-proto/go-api/schemapb"
+
 	"github.com/milvus-io/milvus/internal/common"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/storage"
 	"github.com/milvus-io/milvus/internal/util/typeutil"
+
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
+
+	"github.com/cockroachdb/errors"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
 )
 
 var binlogTestDir = "/tmp/milvus_test/test_binlog_io"
 
+var validGeneratorFn = func(count int, done <-chan struct{}) <-chan UniqueID {
+	ret := make(chan UniqueID, count)
+	for i := 0; i < count; i++ {
+		ret <- int64(100 + i)
+	}
+	return ret
+}
+
 func TestBinlogIOInterfaceMethods(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	alloc := NewAllocatorFactory()
 	cm := storage.NewLocalChunkManager(storage.RootPath(binlogTestDir))
 	defer cm.RemoveWithPrefix(ctx, cm.RootPath())
 
-	b := &binlogIO{cm, alloc}
 	t.Run("Test upload", func(t *testing.T) {
 		f := &MetaFactory{}
 		meta := f.GetCollectionMeta(UniqueID(10001), "uploads", schemapb.DataType_Int64)
@@ -56,7 +67,12 @@ func TestBinlogIOInterfaceMethods(t *testing.T) {
 			Pks:      []primaryKey{pk},
 			Tss:      []uint64{666666},
 		}
+		t.Run("Test upload one iData", func(t *testing.T) {
+			alloc := allocator.NewMockAllocator(t)
+			alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Call.Return(validGeneratorFn, nil)
+			alloc.EXPECT().AllocOne().Call.Return(int64(11111), nil)
 
+			b := &binlogIO{cm, alloc}
 			p, err := b.upload(context.TODO(), 1, 10, []*InsertData{iData}, dData, meta)
 			assert.NoError(t, err)
 			assert.Equal(t, 12, len(p.inPaths))
@@ -64,8 +80,15 @@ func TestBinlogIOInterfaceMethods(t *testing.T) {
 			assert.Equal(t, 1, len(p.inPaths[0].GetBinlogs()))
 			assert.Equal(t, 1, len(p.statsPaths[0].GetBinlogs()))
 			assert.NotNil(t, p.deltaInfo)
+		})
 
-		p, err = b.upload(context.TODO(), 1, 10, []*InsertData{iData, iData}, dData, meta)
+		t.Run("Test upload two iData", func(t *testing.T) {
+			alloc := allocator.NewMockAllocator(t)
+			alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Call.Return(validGeneratorFn, nil)
+			alloc.EXPECT().AllocOne().Call.Return(int64(11111), nil)
+
+			b := &binlogIO{cm, alloc}
+			p, err := b.upload(context.TODO(), 1, 10, []*InsertData{iData, iData}, dData, meta)
 			assert.NoError(t, err)
 			assert.Equal(t, 12, len(p.inPaths))
 			assert.Equal(t, 1, len(p.statsPaths))
@@ -73,33 +96,53 @@ func TestBinlogIOInterfaceMethods(t *testing.T) {
 			assert.Equal(t, 2, len(p.statsPaths[0].GetBinlogs()))
 			assert.NotNil(t, p.deltaInfo)
 
-		ctx, cancel := context.WithCancel(context.Background())
+		})
+
+		t.Run("Test uploadInsertLog", func(t *testing.T) {
+			alloc := allocator.NewMockAllocator(t)
+			alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Call.Return(validGeneratorFn, nil)
+
+			b := &binlogIO{cm, alloc}
 
 			in, stats, err := b.uploadInsertLog(ctx, 1, 10, iData, meta)
 			assert.NoError(t, err)
 			assert.Equal(t, 12, len(in))
 			assert.Equal(t, 1, len(in[0].GetBinlogs()))
 			assert.Equal(t, 1, len(stats))
+		})
+		t.Run("Test uploadDeltaLog", func(t *testing.T) {
+			alloc := allocator.NewMockAllocator(t)
+			alloc.EXPECT().AllocOne().Call.Return(int64(11111), nil)
 
+			b := &binlogIO{cm, alloc}
 			deltas, err := b.uploadDeltaLog(ctx, 1, 10, dData, meta)
 			assert.NoError(t, err)
 			assert.NotNil(t, deltas)
 			assert.Equal(t, 1, len(deltas[0].GetBinlogs()))
+		})
 
+		t.Run("Test context Done", func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
 			cancel()
 
-		p, err = b.upload(ctx, 1, 10, []*InsertData{iData}, dData, meta)
+			alloc := allocator.NewMockAllocator(t)
+			alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Call.Return(validGeneratorFn, nil)
+			alloc.EXPECT().AllocOne().Call.Return(int64(11111), nil)
+
+			b := &binlogIO{cm, alloc}
+
+			p, err := b.upload(ctx, 1, 10, []*InsertData{iData}, dData, meta)
 			assert.EqualError(t, err, errUploadToBlobStorage.Error())
 			assert.Nil(t, p)
 
-		in, _, err = b.uploadInsertLog(ctx, 1, 10, iData, meta)
+			in, _, err := b.uploadInsertLog(ctx, 1, 10, iData, meta)
 			assert.EqualError(t, err, errUploadToBlobStorage.Error())
 			assert.Nil(t, in)
 
-		deltas, err = b.uploadDeltaLog(ctx, 1, 10, dData, meta)
+			deltas, err := b.uploadDeltaLog(ctx, 1, 10, dData, meta)
 			assert.EqualError(t, err, errUploadToBlobStorage.Error())
 			assert.Nil(t, deltas)
-
+		})
 	})
 
 	t.Run("Test upload error", func(t *testing.T) {
@@ -110,6 +153,10 @@ func TestBinlogIOInterfaceMethods(t *testing.T) {
 			Tss: []uint64{},
 		}
 
+		t.Run("Test upload empty insertData", func(t *testing.T) {
+			alloc := allocator.NewMockAllocator(t)
+			b := &binlogIO{cm, alloc}
+
 			iData := genEmptyInsertData()
 			p, err := b.upload(context.TODO(), 1, 10, []*InsertData{iData}, dData, meta)
 			assert.NoError(t, err)
@@ -123,28 +170,40 @@ func TestBinlogIOInterfaceMethods(t *testing.T) {
 			assert.Empty(t, p.inPaths)
 			assert.Empty(t, p.statsPaths)
 			assert.Empty(t, p.deltaInfo)
+		})
 
-		iData = genInsertData()
+		t.Run("Test deleta data not match", func(t *testing.T) {
-		dData = &DeleteData{
+			alloc := allocator.NewMockAllocator(t)
+			alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Call.Return(validGeneratorFn, nil)
+			b := &binlogIO{cm, alloc}
+			iData := genInsertData()
+			dData := &DeleteData{
 				Pks:      []primaryKey{},
 				Tss:      []uint64{1},
 				RowCount: 1,
 			}
-		p, err = b.upload(context.TODO(), 1, 10, []*InsertData{iData}, dData, meta)
+			p, err := b.upload(context.TODO(), 1, 10, []*InsertData{iData}, dData, meta)
 			assert.Error(t, err)
 			assert.Empty(t, p)
+		})
 
+		t.Run("Test multisave error", func(t *testing.T) {
 			mkc := &mockCm{errMultiSave: true}
-		bin := &binlogIO{mkc, alloc}
+			alloc := allocator.NewMockAllocator(t)
+			alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Call.Return(validGeneratorFn, nil)
+			alloc.EXPECT().AllocOne().Call.Return(int64(11111), nil)
+			var (
+				b     = &binlogIO{mkc, alloc}
 				iData = genInsertData()
-		pk := newInt64PrimaryKey(1)
+				pk    = newInt64PrimaryKey(1)
 				dData = &DeleteData{
 					Pks:      []primaryKey{pk},
 					Tss:      []uint64{1},
 					RowCount: 1,
 				}
+			)
 			ctx, cancel := context.WithTimeout(context.TODO(), 20*time.Millisecond)
-		p, err = bin.upload(ctx, 1, 10, []*InsertData{iData}, dData, meta)
+			p, err := b.upload(ctx, 1, 10, []*InsertData{iData}, dData, meta)
 			assert.Error(t, err)
 			assert.Empty(t, p)
 
@@ -155,40 +214,13 @@ func TestBinlogIOInterfaceMethods(t *testing.T) {
 			deltas, err := b.uploadDeltaLog(ctx, 1, 10, dData, meta)
 			assert.Error(t, err)
 			assert.Empty(t, deltas)
-
-		alloc.isvalid = false
-		p, err = bin.upload(ctx, 1, 10, []*InsertData{iData}, dData, meta)
-		assert.Error(t, err)
-		assert.Empty(t, p)
-
-		in, _, err = b.uploadInsertLog(ctx, 1, 10, iData, meta)
-		assert.Error(t, err)
-		assert.Empty(t, in)
-
-		deltas, err = b.uploadDeltaLog(ctx, 1, 10, dData, meta)
-		assert.Error(t, err)
-		assert.Empty(t, deltas)
-
-		alloc.isvalid = true
-		for _, field := range meta.GetSchema().GetFields() {
-			field.IsPrimaryKey = false
-		}
-		p, err = bin.upload(ctx, 1, 10, []*InsertData{iData}, dData, meta)
-		assert.Error(t, err)
-		assert.Empty(t, p)
-
-		in, _, err = b.uploadInsertLog(ctx, 1, 10, iData, meta)
-		assert.Error(t, err)
-		assert.Empty(t, in)
-
-		deltas, err = b.uploadDeltaLog(ctx, 1, 10, dData, meta)
-		assert.Error(t, err)
-		assert.Empty(t, deltas)
-
 			cancel()
 		})
+	})
 
 	t.Run("Test download", func(t *testing.T) {
+		alloc := allocator.NewMockAllocator(t)
+		b := &binlogIO{cm, alloc}
 		tests := []struct {
 			isvalid bool
 			ks      []string // for preparation
@@ -232,6 +264,7 @@ func TestBinlogIOInterfaceMethods(t *testing.T) {
 
 	t.Run("Test download twice", func(t *testing.T) {
 		mkc := &mockCm{errMultiLoad: true}
+		alloc := allocator.NewMockAllocator(t)
 		b := &binlogIO{mkc, alloc}
 
 		ctx, cancel := context.WithTimeout(context.TODO(), time.Millisecond*20)
@@ -259,15 +292,14 @@ func prepareBlob(cm storage.ChunkManager, key string) ([]byte, string, error) {
 func TestBinlogIOInnerMethods(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
-	alloc := NewAllocatorFactory()
 	cm := storage.NewLocalChunkManager(storage.RootPath(binlogTestDir))
 	defer cm.RemoveWithPrefix(ctx, cm.RootPath())
-	b := &binlogIO{
-		cm,
-		alloc,
-	}
 
 	t.Run("Test genDeltaBlobs", func(t *testing.T) {
+		alloc := allocator.NewMockAllocator(t)
+		alloc.EXPECT().AllocOne().Call.Return(int64(11111), nil)
+
+		b := &binlogIO{cm, alloc}
 		f := &MetaFactory{}
 		meta := f.GetCollectionMeta(UniqueID(10002), "test_gen_blobs", schemapb.DataType_Int64)
 
@@ -302,23 +334,34 @@ func TestBinlogIOInnerMethods(t *testing.T) {
 
 	t.Run("Test genDeltaBlobs error", func(t *testing.T) {
 		pk := newInt64PrimaryKey(1)
+
+		t.Run("Test serialize error", func(t *testing.T) {
+			alloc := allocator.NewMockAllocator(t)
+			b := &binlogIO{cm, alloc}
 			k, v, err := b.genDeltaBlobs(&DeleteData{Pks: []primaryKey{pk}, Tss: []uint64{}}, 1, 1, 1)
 			assert.Error(t, err)
 			assert.Empty(t, k)
 			assert.Empty(t, v)
-
+		})
-		errAlloc := NewAllocatorFactory()
+
-		errAlloc.isvalid = false
+		t.Run("Test AllocOne error", func(t *testing.T) {
-
+			alloc := allocator.NewMockAllocator(t)
-		bin := binlogIO{cm, errAlloc}
+			alloc.EXPECT().AllocOne().Call.Return(int64(0), fmt.Errorf("mock AllocOne error"))
-		k, v, err = bin.genDeltaBlobs(&DeleteData{Pks: []primaryKey{pk}, Tss: []uint64{1}}, 1, 1, 1)
+			bin := binlogIO{cm, alloc}
-		assert.Error(t, err)
+			k, v, err := bin.genDeltaBlobs(&DeleteData{Pks: []primaryKey{pk}, Tss: []uint64{1}}, 1, 1, 1)
-		assert.Empty(t, k)
+			assert.Error(t, err)
-		assert.Empty(t, v)
+			assert.Empty(t, k)
+			assert.Empty(t, v)
+
+		})
 	})
 
 	t.Run("Test genInsertBlobs", func(t *testing.T) {
 		f := &MetaFactory{}
+		alloc := allocator.NewMockAllocator(t)
+		alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Call.Return(validGeneratorFn, nil)
+		b := binlogIO{cm, alloc}
+
 		tests := []struct {
 			pkType      schemapb.DataType
 			description string
@@ -353,81 +396,36 @@ func TestBinlogIOInnerMethods(t *testing.T) {
 	})
 
 	t.Run("Test genInsertBlobs error", func(t *testing.T) {
-		kvs, pin, pstats, err := b.genInsertBlobs(&InsertData{}, 1, 1, nil)
+		ctx, cancel := context.WithCancel(context.Background())
+		defer cancel()
+		cm := storage.NewLocalChunkManager(storage.RootPath(binlogTestDir))
+		defer cm.RemoveWithPrefix(ctx, cm.RootPath())
+
+		t.Run("serialize error", func(t *testing.T) {
+			bin := &binlogIO{cm, allocator.NewMockAllocator(t)}
+			kvs, pin, pstats, err := bin.genInsertBlobs(genEmptyInsertData(), 10, 1, nil)
+
 			assert.Error(t, err)
 			assert.Empty(t, kvs)
 			assert.Empty(t, pin)
 			assert.Empty(t, pstats)
+		})
 
+		t.Run("GetGenerator error", func(t *testing.T) {
 			f := &MetaFactory{}
 			meta := f.GetCollectionMeta(UniqueID(10001), "test_gen_blobs", schemapb.DataType_Int64)
 
-		kvs, pin, pstats, err = b.genInsertBlobs(genEmptyInsertData(), 10, 1, meta)
+			alloc := allocator.NewMockAllocator(t)
-		assert.Error(t, err)
+			alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Return(nil, fmt.Errorf("mock GetGenerator error"))
-		assert.Empty(t, kvs)
+			bin := &binlogIO{cm, alloc}
-		assert.Empty(t, pin)
+			kvs, pin, pstats, err := bin.genInsertBlobs(genInsertData(), 10, 1, meta)
-		assert.Empty(t, pstats)
-
-		errAlloc := NewAllocatorFactory()
-		errAlloc.errAllocBatch = true
-		bin := &binlogIO{cm, errAlloc}
-		kvs, pin, pstats, err = bin.genInsertBlobs(genInsertData(), 10, 1, meta)
 
 			assert.Error(t, err)
 			assert.Empty(t, kvs)
 			assert.Empty(t, pin)
 			assert.Empty(t, pstats)
 		})
-
-	t.Run("Test idxGenerator", func(t *testing.T) {
-		tests := []struct {
-			isvalid  bool
-			innumber int
-
-			expectedNo  int
-			description string
-		}{
-			{false, 0, 0, "Invalid input count n"},
-			{true, 1, 1, "valid input n 1"},
-			{true, 3, 3, "valid input n 3 with cancel"},
-		}
-
-		for _, test := range tests {
-			t.Run(test.description, func(t *testing.T) {
-				done := make(chan struct{})
-				if test.isvalid {
-					gen, err := b.idxGenerator(test.innumber, done)
-					assert.NoError(t, err)
-
-					r := make([]UniqueID, 0)
-					for i := range gen {
-						r = append(r, i)
-					}
-
-					assert.Equal(t, test.expectedNo, len(r))
-
-					if test.innumber > 1 {
-						donedone := make(chan struct{})
-						gen, err := b.idxGenerator(test.innumber, donedone)
-						assert.NoError(t, err)
-
-						_, ok := <-gen
-						assert.True(t, ok)
-
-						donedone <- struct{}{}
-
-						_, ok = <-gen
-						assert.False(t, ok)
-					}
-				} else {
-					gen, err := b.idxGenerator(test.innumber, done)
-					assert.Error(t, err)
-					assert.Nil(t, gen)
-				}
 	})
-		}
-	})
-
 }
 
 type mockCm struct {

internal/datanode/compactor.go

@@ -30,6 +30,7 @@ import (
 
 	"github.com/milvus-io/milvus-proto/go-api/schemapb"
 	"github.com/milvus-io/milvus/internal/common"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/metrics"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
@@ -75,7 +76,7 @@ type compactionTask struct {
 	compactor
 	Channel
 	flushManager
-	allocatorInterface
+	allocator.Allocator
 
 	plan *datapb.CompactionPlan
 
@@ -97,7 +98,7 @@ func newCompactionTask(
 	ul uploader,
 	channel Channel,
 	fm flushManager,
-	alloc allocatorInterface,
+	alloc allocator.Allocator,
 	plan *datapb.CompactionPlan,
 	chunkManager storage.ChunkManager) *compactionTask {
 
@@ -110,7 +111,7 @@ func newCompactionTask(
 		uploader:     ul,
 		Channel:      channel,
 		flushManager: fm,
-		allocatorInterface: alloc,
+		Allocator:    alloc,
 		plan:         plan,
 		tr:           timerecord.NewTimeRecorder("compactionTask"),
 		chunkManager: chunkManager,
@@ -445,7 +446,7 @@ func (t *compactionTask) compact() (*datapb.CompactionResult, error) {
 		return nil, errIllegalCompactionPlan
 
 	case t.plan.GetType() == datapb.CompactionType_MergeCompaction || t.plan.GetType() == datapb.CompactionType_MixCompaction:
-		targetSegID, err = t.allocID()
+		targetSegID, err = t.AllocOne()
 		if err != nil {
 			log.Warn("compact wrong", zap.Error(err))
 			return nil, err

internal/datanode/compactor_test.go

@@ -38,6 +38,8 @@ import (
 	"github.com/milvus-io/milvus/internal/proto/etcdpb"
 	"github.com/milvus-io/milvus/internal/storage"
 	"github.com/milvus-io/milvus/internal/util/paramtable"
+
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 )
 
 var compactTestDir = "/tmp/milvus_test/compact"
@@ -276,8 +278,10 @@ func TestCompactionTaskInnerMethods(t *testing.T) {
 				Schema: meta.GetSchema(),
 			}, nil)
 		channel := newChannel("a", collectionID, meta.GetSchema(), rc, nil)
+		alloc := allocator.NewMockAllocator(t)
+		alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Call.Return(validGeneratorFn, nil)
 		t.Run("Merge without expiration", func(t *testing.T) {
-			alloc := NewAllocatorFactory(1)
+
 			mockbIO := &binlogIO{cm, alloc}
 			paramtable.Get().Save(Params.CommonCfg.EntityExpirationTTL.Key, "0")
 			iData := genInsertDataWithExpiredTS()
@@ -309,7 +313,6 @@ func TestCompactionTaskInnerMethods(t *testing.T) {
 			assert.Equal(t, 1, len(statsPaths))
 		})
 		t.Run("Merge without expiration2", func(t *testing.T) {
-			alloc := NewAllocatorFactory(1)
 			mockbIO := &binlogIO{cm, alloc}
 			paramtable.Get().Save(Params.CommonCfg.EntityExpirationTTL.Key, "0")
 			BinLogMaxSize := Params.DataNodeCfg.BinLogMaxSize
@@ -347,7 +350,6 @@ func TestCompactionTaskInnerMethods(t *testing.T) {
 		})
 
 		t.Run("Merge with expiration", func(t *testing.T) {
-			alloc := NewAllocatorFactory(1)
 			mockbIO := &binlogIO{cm, alloc}
 
 			iData := genInsertDataWithExpiredTS()
@@ -390,7 +392,6 @@ func TestCompactionTaskInnerMethods(t *testing.T) {
 		})
 
 		t.Run("Merge with meta error", func(t *testing.T) {
-			alloc := NewAllocatorFactory(1)
 			mockbIO := &binlogIO{cm, alloc}
 			paramtable.Get().Save(Params.CommonCfg.EntityExpirationTTL.Key, "0")
 			iData := genInsertDataWithExpiredTS()
@@ -427,7 +428,6 @@ func TestCompactionTaskInnerMethods(t *testing.T) {
 		})
 
 		t.Run("Merge with meta type param error", func(t *testing.T) {
-			alloc := NewAllocatorFactory(1)
 			mockbIO := &binlogIO{cm, alloc}
 			paramtable.Get().Save(Params.CommonCfg.EntityExpirationTTL.Key, "0")
 			iData := genInsertDataWithExpiredTS()
@@ -574,12 +574,14 @@ func TestCompactorInterfaceMethods(t *testing.T) {
 	paramtable.Get().Save(Params.CommonCfg.EntityExpirationTTL.Key, "0") // Turn off auto expiration
 
 	t.Run("Test compact invalid", func(t *testing.T) {
-		invalidAlloc := NewAllocatorFactory(-1)
+		alloc := allocator.NewMockAllocator(t)
+		alloc.EXPECT().AllocOne().Call.Return(int64(11111), nil)
 		ctx, cancel := context.WithCancel(context.TODO())
 		emptyTask := &compactionTask{
 			ctx:     ctx,
 			cancel:  cancel,
 			done:    make(chan struct{}, 1),
+			Channel: &ChannelMeta{},
 		}
 
 		plan := &datapb.CompactionPlan{
@@ -596,7 +598,7 @@ func TestCompactorInterfaceMethods(t *testing.T) {
 		assert.Error(t, err)
 
 		plan.Type = datapb.CompactionType_MergeCompaction
-		emptyTask.allocatorInterface = invalidAlloc
+		emptyTask.Allocator = alloc
 		plan.SegmentBinlogs = notEmptySegmentBinlogs
 		_, err = emptyTask.compact()
 		assert.Error(t, err)
@@ -606,7 +608,9 @@ func TestCompactorInterfaceMethods(t *testing.T) {
 	})
 
 	t.Run("Test typeII compact valid", func(t *testing.T) {
-		alloc := NewAllocatorFactory(1)
+		alloc := allocator.NewMockAllocator(t)
+		alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Call.Return(validGeneratorFn, nil)
+		alloc.EXPECT().AllocOne().Call.Return(int64(19530), nil)
 		type testCase struct {
 			pkType schemapb.DataType
 			iData1 storage.FieldData
@@ -702,7 +706,6 @@ func TestCompactorInterfaceMethods(t *testing.T) {
 				Channel:          "channelname",
 			}
 
-			alloc.random = false // generated ID = 19530
 			task := newCompactionTask(context.TODO(), mockbIO, mockbIO, channel, mockfm, alloc, plan, nil)
 			result, err := task.compact()
 			assert.NoError(t, err)
@@ -775,7 +778,9 @@ func TestCompactorInterfaceMethods(t *testing.T) {
 		// Both pk = 1 rows of the two segments are compacted.
 		var collID, partID, segID1, segID2 UniqueID = 1, 10, 200, 201
 
-		alloc := NewAllocatorFactory(1)
+		alloc := allocator.NewMockAllocator(t)
+		alloc.EXPECT().AllocOne().Call.Return(int64(19530), nil)
+		alloc.EXPECT().GetGenerator(mock.Anything, mock.Anything).Call.Return(validGeneratorFn, nil)
 		rc := &RootCoordFactory{
 			pkType: schemapb.DataType_Int64,
 		}
@@ -838,7 +843,6 @@ func TestCompactorInterfaceMethods(t *testing.T) {
 			Channel:          "channelname",
 		}
 
-		alloc.random = false // generated ID = 19530
 		task := newCompactionTask(context.TODO(), mockbIO, mockbIO, channel, mockfm, alloc, plan, nil)
 		result, err := task.compact()
 		assert.NoError(t, err)

internal/datanode/data_node.go

@@ -35,12 +35,13 @@ import (
 	"github.com/cockroachdb/errors"
 
 	"github.com/golang/protobuf/proto"
-	"github.com/milvus-io/milvus-proto/go-api/commonpb"
 	v3rpc "go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
 	clientv3 "go.etcd.io/etcd/client/v3"
 	"go.uber.org/zap"
 
-	allocator2 "github.com/milvus-io/milvus/internal/allocator"
+	"github.com/milvus-io/milvus-proto/go-api/commonpb"
+
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/kv"
 	etcdkv "github.com/milvus-io/milvus/internal/kv/etcd"
 	"github.com/milvus-io/milvus/internal/log"
@@ -124,7 +125,7 @@ type DataNode struct {
 	session      *sessionutil.Session
 	watchKv      kv.MetaKv
 	chunkManager storage.ChunkManager
-	rowIDAllocator *allocator2.IDAllocator
+	allocator    allocator.Allocator
 
 	closer io.Closer
 
@@ -254,7 +255,7 @@ func (node *DataNode) Init() error {
 		node.dispClient = msgdispatcher.NewClient(node.factory, typeutil.DataNodeRole, paramtable.GetNodeID())
 		log.Info("DataNode server init dispatcher client done", zap.Int64("node ID", paramtable.GetNodeID()))
 
-		idAllocator, err := allocator2.NewIDAllocator(node.ctx, node.rootCoord, paramtable.GetNodeID())
+		alloc, err := allocator.New(context.Background(), node.rootCoord, paramtable.GetNodeID())
 		if err != nil {
 			log.Error("failed to create id allocator",
 				zap.Error(err),
@@ -262,7 +263,7 @@ func (node *DataNode) Init() error {
 			initError = err
 			return
 		}
-		node.rowIDAllocator = idAllocator
+		node.allocator = alloc
 
 		node.factory.Init(Params)
 		log.Info("DataNode server init succeeded",
@@ -489,7 +490,7 @@ func (node *DataNode) BackGroundGC(vChannelCh <-chan string) {
 
 // Start will update DataNode state to HEALTHY
 func (node *DataNode) Start() error {
-	if err := node.rowIDAllocator.Start(); err != nil {
+	if err := node.allocator.Start(); err != nil {
 		log.Error("failed to start id allocator", zap.Error(err), zap.String("role", typeutil.DataNodeRole))
 		return err
 	}
@@ -565,14 +566,13 @@ func (node *DataNode) ReadyToFlush() error {
 func (node *DataNode) Stop() error {
 	// https://github.com/milvus-io/milvus/issues/12282
 	node.UpdateStateCode(commonpb.StateCode_Abnormal)
-
-	node.cancel()
 	node.flowgraphManager.dropAll()
 	node.flowgraphManager.stop()
 
-	if node.rowIDAllocator != nil {
+	node.cancel()
+	if node.allocator != nil {
 		log.Info("close id allocator", zap.String("role", typeutil.DataNodeRole))
-		node.rowIDAllocator.Close()
+		node.allocator.Close()
 	}
 
 	if node.closer != nil {

internal/datanode/data_node_test.go

@@ -242,7 +242,6 @@ func TestWatchChannel(t *testing.T) {
 	defer cancel()
 
 	t.Run("test watch channel", func(t *testing.T) {
-		// GOOSE TODO
 		kv := etcdkv.NewEtcdKV(etcdCli, Params.EtcdCfg.MetaRootPath.GetValue())
 		oldInvalidCh := "datanode-etcd-test-by-dev-rootcoord-dml-channel-invalid"
 		path := fmt.Sprintf("%s/%d/%s", Params.CommonCfg.DataCoordWatchSubPath.GetValue(), paramtable.GetNodeID(), oldInvalidCh)

internal/datanode/data_sync_service.go

@@ -26,6 +26,7 @@ import (
 	"go.uber.org/zap"
 
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/metrics"
 	"github.com/milvus-io/milvus/internal/mq/msgdispatcher"
@@ -50,7 +51,7 @@ type dataSyncService struct {
 	flushCh      chan flushMsg
 	resendTTCh   chan resendTTMsg    // chan to ask for resending DataNode time tick message.
 	channel      Channel             // channel stores meta of channel
-	idAllocator  allocatorInterface // id/timestamp allocator
+	idAllocator  allocator.Allocator // id/timestamp allocator
 	dispClient   msgdispatcher.Client
 	msFactory    msgstream.Factory
 	collectionID UniqueID // collection id of vchan for which this data sync service serves
@@ -73,7 +74,7 @@ func newDataSyncService(ctx context.Context,
 	flushCh chan flushMsg,
 	resendTTCh chan resendTTMsg,
 	channel Channel,
-	alloc allocatorInterface,
+	alloc allocator.Allocator,
 	dispClient msgdispatcher.Client,
 	factory msgstream.Factory,
 	vchan *datapb.VchannelInfo,
@@ -135,7 +136,7 @@ type nodeConfig struct {
 	collectionID UniqueID
 	vChannelName string
 	channel      Channel // Channel info
-	allocator    allocatorInterface
+	allocator    allocator.Allocator
 	serverID     int64
 	// defaults
 	parallelConfig

internal/datanode/data_sync_service_test.go

@@ -26,6 +26,7 @@ import (
 	"time"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
 
@@ -33,6 +34,7 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/msgpb"
 	"github.com/milvus-io/milvus-proto/go-api/schemapb"
 	"github.com/milvus-io/milvus/internal/common"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/mq/msgdispatcher"
 	"github.com/milvus-io/milvus/internal/mq/msgstream"
@@ -113,7 +115,7 @@ type testInfo struct {
 	description string
 }
 
-func TestDataSyncService_newDataSyncService(te *testing.T) {
+func TestDataSyncService_newDataSyncService(t *testing.T) {
 
 	ctx := context.Background()
 
@@ -158,7 +160,7 @@ func TestDataSyncService_newDataSyncService(te *testing.T) {
 	defer cm.RemoveWithPrefix(ctx, cm.RootPath())
 
 	for _, test := range tests {
-		te.Run(test.description, func(t *testing.T) {
+		t.Run(test.description, func(t *testing.T) {
 			df := &DataCoordFactory{}
 			rc := &RootCoordFactory{pkType: schemapb.DataType_Int64}
 
@@ -172,7 +174,7 @@ func TestDataSyncService_newDataSyncService(te *testing.T) {
 				make(chan flushMsg),
 				make(chan resendTTMsg),
 				channel,
-				NewAllocatorFactory(),
+				allocator.NewMockAllocator(t),
 				dispClient,
 				test.inMsgFactory,
 				getVchanInfo(test),
@@ -224,7 +226,11 @@ func TestDataSyncService_Start(t *testing.T) {
 	defer cm.RemoveWithPrefix(ctx, cm.RootPath())
 	channel := newChannel(insertChannelName, collMeta.ID, collMeta.GetSchema(), mockRootCoord, cm)
 
-	allocFactory := NewAllocatorFactory(1)
+	alloc := allocator.NewMockAllocator(t)
+	alloc.EXPECT().Alloc(mock.Anything).Call.Return(int64(22222),
+		func(count uint32) int64 {
+			return int64(22222 + count)
+		}, nil)
 	factory := dependency.NewDefaultFactory(true)
 	dispClient := msgdispatcher.NewClient(factory, typeutil.DataNodeRole, paramtable.GetNodeID())
 	defer os.RemoveAll("/tmp/milvus")
@@ -280,7 +286,7 @@ func TestDataSyncService_Start(t *testing.T) {
 		},
 	}
 
-	sync, err := newDataSyncService(ctx, flushChan, resendTTChan, channel, allocFactory, dispClient, factory, vchan, signalCh, dataCoord, newCache(), cm, newCompactionExecutor(), genTestTickler(), 0)
+	sync, err := newDataSyncService(ctx, flushChan, resendTTChan, channel, alloc, dispClient, factory, vchan, signalCh, dataCoord, newCache(), cm, newCompactionExecutor(), genTestTickler(), 0)
 	assert.Nil(t, err)
 
 	sync.flushListener = make(chan *segmentFlushPack)
@@ -401,13 +407,18 @@ func TestDataSyncService_Close(t *testing.T) {
 		UnflushedSegmentIds: ufsIds,
 		FlushedSegmentIds:   fsIds,
 	}
+	alloc := allocator.NewMockAllocator(t)
+	alloc.EXPECT().AllocOne().Call.Return(int64(11111), nil)
+	alloc.EXPECT().Alloc(mock.Anything).Call.Return(int64(22222),
+		func(count uint32) int64 {
+			return int64(22222 + count)
+		}, nil)
 
 	var (
 		flushChan    = make(chan flushMsg, 100)
 		resendTTChan = make(chan resendTTMsg, 100)
 		signalCh     = make(chan string, 100)
 
-		allocFactory  = NewAllocatorFactory(1)
 		factory       = dependency.NewDefaultFactory(true)
 		dispClient    = msgdispatcher.NewClient(factory, typeutil.DataNodeRole, paramtable.GetNodeID())
 		mockDataCoord = &DataCoordFactory{}
@@ -432,7 +443,7 @@ func TestDataSyncService_Close(t *testing.T) {
 	paramtable.Get().Reset(Params.DataNodeCfg.FlushInsertBufferSize.Key)
 
 	channel := newChannel(insertChannelName, collMeta.ID, collMeta.GetSchema(), mockRootCoord, cm)
-	sync, err := newDataSyncService(ctx, flushChan, resendTTChan, channel, allocFactory, dispClient, factory, vchan, signalCh, mockDataCoord, newCache(), cm, newCompactionExecutor(), genTestTickler(), 0)
+	sync, err := newDataSyncService(ctx, flushChan, resendTTChan, channel, alloc, dispClient, factory, vchan, signalCh, mockDataCoord, newCache(), cm, newCompactionExecutor(), genTestTickler(), 0)
 	assert.Nil(t, err)
 
 	sync.flushListener = make(chan *segmentFlushPack, 10)

internal/datanode/flow_graph_delete_node.go

@@ -25,6 +25,7 @@ import (
 	"go.uber.org/zap"
 
 	"github.com/milvus-io/milvus-proto/go-api/msgpb"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/mq/msgstream"
 	"github.com/milvus-io/milvus/internal/storage"
@@ -39,7 +40,7 @@ type deleteNode struct {
 	channelName      string
 	delBufferManager *DelBufferManager // manager of delete msg
 	channel          Channel
-	idAllocator      allocatorInterface
+	idAllocator      allocator.Allocator
 	flushManager     flushManager
 
 	clearSignal chan<- string

internal/datanode/flow_graph_delete_node_test.go

@@ -28,6 +28,7 @@ import (
 
 	"github.com/milvus-io/milvus-proto/go-api/schemapb"
 	"github.com/milvus-io/milvus/internal/common"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/mq/msgstream"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/storage"
@@ -181,10 +182,11 @@ func TestFlowGraphDeleteNode_Operate(t *testing.T) {
 
 	t.Run("Test get segment by varChar primary keys", func(te *testing.T) {
 		channel := genMockChannel(segIDs, varCharPks, chanName)
-		fm := NewRendezvousFlushManager(NewAllocatorFactory(), cm, channel, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
+		alloc := allocator.NewMockAllocator(t)
+		fm := NewRendezvousFlushManager(alloc, cm, channel, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
 		c := &nodeConfig{
 			channel:      channel,
-			allocator:    &allocator{},
+			allocator:    alloc,
 			vChannelName: chanName,
 		}
 		delBufManager := &DelBufferManager{
@@ -214,11 +216,12 @@ func TestFlowGraphDeleteNode_Operate(t *testing.T) {
 	})
 
 	channel := genMockChannel(segIDs, int64Pks, chanName)
-	fm := NewRendezvousFlushManager(NewAllocatorFactory(), cm, channel, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
+	alloc := allocator.NewMockAllocator(t)
+	fm := NewRendezvousFlushManager(alloc, cm, channel, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
 	t.Run("Test get segment by int64 primary keys", func(te *testing.T) {
 		c := &nodeConfig{
 			channel:      channel,
-			allocator:    &allocator{},
+			allocator:    alloc,
 			vChannelName: chanName,
 		}
 
@@ -260,7 +263,7 @@ func TestFlowGraphDeleteNode_Operate(t *testing.T) {
 
 		c := &nodeConfig{
 			channel:      channel,
-			allocator:    NewAllocatorFactory(),
+			allocator:    allocator.NewMockAllocator(t),
 			vChannelName: chanName,
 		}
 		delBufManager := &DelBufferManager{
@@ -288,7 +291,7 @@ func TestFlowGraphDeleteNode_Operate(t *testing.T) {
 
 		c := &nodeConfig{
 			channel:      channel,
-			allocator:    NewAllocatorFactory(),
+			allocator:    allocator.NewMockAllocator(t),
 			vChannelName: chanName,
 		}
 		delBufManager := &DelBufferManager{
@@ -322,7 +325,7 @@ func TestFlowGraphDeleteNode_Operate(t *testing.T) {
 
 		c := &nodeConfig{
 			channel:      channel,
-			allocator:    NewAllocatorFactory(),
+			allocator:    allocator.NewMockAllocator(t),
 			vChannelName: chanName,
 		}
 		delBufManager := &DelBufferManager{
@@ -364,7 +367,7 @@ func TestFlowGraphDeleteNode_Operate(t *testing.T) {
 
 		c := &nodeConfig{
 			channel:      channel,
-			allocator:    NewAllocatorFactory(),
+			allocator:    allocator.NewMockAllocator(t),
 			vChannelName: chanName,
 		}
 		delBufManager := &DelBufferManager{
@@ -392,7 +395,7 @@ func TestFlowGraphDeleteNode_Operate(t *testing.T) {
 			&DelDataBuf{delData: &DeleteData{}, item: bufItem})
 		heap.Push(delNode.delBufferManager.delBufHeap, bufItem)
 
-		delNode.flushManager = NewRendezvousFlushManager(&allocator{}, cm, channel,
+		delNode.flushManager = NewRendezvousFlushManager(allocator.NewMockAllocator(t), cm, channel,
 			func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
 
 		var fgMsg flowgraph.Msg = &msg
@@ -419,7 +422,7 @@ func TestFlowGraphDeleteNode_Operate(t *testing.T) {
 
 		c := &nodeConfig{
 			channel:      channel,
-			allocator:    NewAllocatorFactory(),
+			allocator:    allocator.NewMockAllocator(t),
 			vChannelName: chanName,
 		}
 		delBufManager := &DelBufferManager{
@@ -513,7 +516,7 @@ func TestFlowGraphDeleteNode_showDelBuf(t *testing.T) {
 	cm := storage.NewLocalChunkManager(storage.RootPath(deleteNodeTestDir))
 	defer cm.RemoveWithPrefix(ctx, cm.RootPath())
 
-	fm := NewRendezvousFlushManager(NewAllocatorFactory(), cm, nil, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
+	fm := NewRendezvousFlushManager(allocator.NewMockAllocator(t), cm, nil, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
 
 	chanName := "datanode-test-FlowGraphDeletenode-showDelBuf"
 	testPath := "/test/datanode/root/meta"
@@ -525,7 +528,7 @@ func TestFlowGraphDeleteNode_showDelBuf(t *testing.T) {
 	}
 	c := &nodeConfig{
 		channel:      channel,
-		allocator:    NewAllocatorFactory(),
+		allocator:    allocator.NewMockAllocator(t),
 		vChannelName: chanName,
 	}
 	delBufManager := &DelBufferManager{
@@ -562,7 +565,7 @@ func TestFlowGraphDeleteNode_updateCompactedSegments(t *testing.T) {
 	cm := storage.NewLocalChunkManager(storage.RootPath(deleteNodeTestDir))
 	defer cm.RemoveWithPrefix(ctx, cm.RootPath())
 
-	fm := NewRendezvousFlushManager(NewAllocatorFactory(), cm, nil, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
+	fm := NewRendezvousFlushManager(allocator.NewMockAllocator(t), cm, nil, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
 
 	chanName := "datanode-test-FlowGraphDeletenode-showDelBuf"
 	testPath := "/test/datanode/root/meta"
@@ -575,7 +578,7 @@ func TestFlowGraphDeleteNode_updateCompactedSegments(t *testing.T) {
 
 	c := &nodeConfig{
 		channel:      &channel,
-		allocator:    NewAllocatorFactory(),
+		allocator:    allocator.NewMockAllocator(t),
 		vChannelName: chanName,
 	}
 	delBufManager := &DelBufferManager{

internal/datanode/flow_graph_insert_buffer_node.go

@@ -30,6 +30,7 @@ import (
 
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/msgpb"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/metrics"
 	"github.com/milvus-io/milvus/internal/mq/msgstream"
@@ -50,7 +51,7 @@ type insertBufferNode struct {
 	channelName      string
 	delBufferManager *DelBufferManager // manager of delete msg
 	channel          Channel
-	idAllocator      allocatorInterface
+	idAllocator      allocator.Allocator
 
 	flushMap         sync.Map
 	flushChan        <-chan flushMsg

internal/datanode/flow_graph_insert_buffer_node_test.go

@@ -27,6 +27,7 @@ import (
 	"github.com/cockroachdb/errors"
 	"github.com/samber/lo"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
 	"github.com/stretchr/testify/suite"
 
@@ -34,6 +35,7 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
 	"github.com/milvus-io/milvus-proto/go-api/msgpb"
 	"github.com/milvus-io/milvus-proto/go-api/schemapb"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/mq/msgstream"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/etcdpb"
@@ -97,7 +99,8 @@ func TestFlowGraphInsertBufferNodeCreate(t *testing.T) {
 
 	factory := dependency.NewDefaultFactory(true)
 
-	fm := NewRendezvousFlushManager(&allocator{}, cm, channel, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
+	alloc := allocator.NewMockAllocator(t)
+	fm := NewRendezvousFlushManager(alloc, cm, channel, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
 
 	flushChan := make(chan flushMsg, 100)
 	resendTTChan := make(chan resendTTMsg, 100)
@@ -105,7 +108,7 @@ func TestFlowGraphInsertBufferNodeCreate(t *testing.T) {
 	c := &nodeConfig{
 		channel:      channel,
 		msFactory:    factory,
-		allocator:    NewAllocatorFactory(),
+		allocator:    alloc,
 		vChannelName: "string",
 	}
 	delBufManager := &DelBufferManager{
@@ -201,14 +204,19 @@ func TestFlowGraphInsertBufferNode_Operate(t *testing.T) {
 
 	factory := dependency.NewDefaultFactory(true)
 
-	fm := NewRendezvousFlushManager(NewAllocatorFactory(), cm, channel, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
+	alloc := allocator.NewMockAllocator(t)
+	alloc.EXPECT().Alloc(mock.Anything).Call.Return(int64(22222),
+		func(count uint32) int64 {
+			return int64(22222 + count)
+		}, nil)
+	fm := NewRendezvousFlushManager(alloc, cm, channel, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
 
 	flushChan := make(chan flushMsg, 100)
 	resendTTChan := make(chan resendTTMsg, 100)
 	c := &nodeConfig{
 		channel:      channel,
 		msFactory:    factory,
-		allocator:    NewAllocatorFactory(),
+		allocator:    alloc,
 		vChannelName: "string",
 	}
 	delBufManager := &DelBufferManager{
@@ -363,7 +371,12 @@ func TestFlowGraphInsertBufferNode_AutoFlush(t *testing.T) {
 
 	cm := storage.NewLocalChunkManager(storage.RootPath(insertNodeTestDir))
 	defer cm.RemoveWithPrefix(ctx, cm.RootPath())
-	fm := NewRendezvousFlushManager(NewAllocatorFactory(), cm, channel, func(pack *segmentFlushPack) {
+	alloc := allocator.NewMockAllocator(t)
+	alloc.EXPECT().Alloc(mock.Anything).Call.Return(int64(22222),
+		func(count uint32) int64 {
+			return int64(22222 + count)
+		}, nil)
+	fm := NewRendezvousFlushManager(alloc, cm, channel, func(pack *segmentFlushPack) {
 		fpMut.Lock()
 		flushPacks = append(flushPacks, pack)
 		fpMut.Unlock()
@@ -382,7 +395,7 @@ func TestFlowGraphInsertBufferNode_AutoFlush(t *testing.T) {
 	c := &nodeConfig{
 		channel:      channel,
 		msFactory:    factory,
-		allocator:    NewAllocatorFactory(),
+		allocator:    alloc,
 		vChannelName: "string",
 	}
 	delBufManager := &DelBufferManager{
@@ -571,7 +584,7 @@ func TestFlowGraphInsertBufferNode_AutoFlush(t *testing.T) {
 	})
 }
 
-func TestRollBF(t *testing.T) {
+func TestInsertBufferNodeRollBF(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
 
@@ -604,7 +617,12 @@ func TestRollBF(t *testing.T) {
 
 	cm := storage.NewLocalChunkManager(storage.RootPath(insertNodeTestDir))
 	defer cm.RemoveWithPrefix(ctx, cm.RootPath())
-	fm := NewRendezvousFlushManager(NewAllocatorFactory(), cm, channel, func(pack *segmentFlushPack) {
+	alloc := allocator.NewMockAllocator(t)
+	alloc.EXPECT().Alloc(mock.Anything).Call.Return(int64(22222),
+		func(count uint32) int64 {
+			return int64(22222 + count)
+		}, nil)
+	fm := NewRendezvousFlushManager(alloc, cm, channel, func(pack *segmentFlushPack) {
 		fpMut.Lock()
 		flushPacks = append(flushPacks, pack)
 		fpMut.Unlock()
@@ -623,7 +641,7 @@ func TestRollBF(t *testing.T) {
 	c := &nodeConfig{
 		channel:      channel,
 		msFactory:    factory,
-		allocator:    NewAllocatorFactory(),
+		allocator:    alloc,
 		vChannelName: "string",
 	}
 	delBufManager := &DelBufferManager{
@@ -992,14 +1010,15 @@ func TestInsertBufferNode_bufferInsertMsg(t *testing.T) {
 
 		factory := dependency.NewDefaultFactory(true)
 
-		fm := NewRendezvousFlushManager(&allocator{}, cm, channel, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
+		alloc := allocator.NewMockAllocator(t)
+		fm := NewRendezvousFlushManager(alloc, cm, channel, func(*segmentFlushPack) {}, emptyFlushAndDropFunc)
 
 		flushChan := make(chan flushMsg, 100)
 		resendTTChan := make(chan resendTTMsg, 100)
 		c := &nodeConfig{
 			channel:      channel,
 			msFactory:    factory,
-			allocator:    NewAllocatorFactory(),
+			allocator:    alloc,
 			vChannelName: "string",
 		}
 		delBufManager := &DelBufferManager{

internal/datanode/flow_graph_manager.go

@@ -102,19 +102,18 @@ func (fm *flowgraphManager) execute(totalMemory uint64) {
 }
 
 func (fm *flowgraphManager) addAndStart(dn *DataNode, vchan *datapb.VchannelInfo, schema *schemapb.CollectionSchema, tickler *tickler) error {
+	log := log.With(zap.String("channel", vchan.GetChannelName()))
 	if _, ok := fm.flowgraphs.Load(vchan.GetChannelName()); ok {
-		log.Warn("try to add an existed DataSyncService", zap.String("vChannelName", vchan.GetChannelName()))
+		log.Warn("try to add an existed DataSyncService")
 		return nil
 	}
 
 	channel := newChannel(vchan.GetChannelName(), vchan.GetCollectionID(), schema, dn.rootCoord, dn.chunkManager)
 
-	var alloc allocatorInterface = newAllocator(dn.rootCoord)
-
 	dataSyncService, err := newDataSyncService(dn.ctx, make(chan flushMsg, 100), make(chan resendTTMsg, 100), channel,
-		alloc, dn.dispClient, dn.factory, vchan, dn.clearSignal, dn.dataCoord, dn.segmentCache, dn.chunkManager, dn.compactionExecutor, tickler, dn.GetSession().ServerID)
+		dn.allocator, dn.dispClient, dn.factory, vchan, dn.clearSignal, dn.dataCoord, dn.segmentCache, dn.chunkManager, dn.compactionExecutor, tickler, dn.GetSession().ServerID)
 	if err != nil {
-		log.Warn("new data sync service fail", zap.String("vChannelName", vchan.GetChannelName()), zap.Error(err))
+		log.Warn("fail to create new datasyncservice", zap.Error(err))
 		return err
 	}
 	dataSyncService.start()

internal/datanode/flush_manager.go

@@ -31,6 +31,7 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/msgpb"
 	"github.com/milvus-io/milvus/internal/common"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/metrics"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
@@ -262,7 +263,7 @@ type dropHandler struct {
 
 // rendezvousFlushManager makes sure insert & del buf all flushed
 type rendezvousFlushManager struct {
-	allocatorInterface
+	allocator.Allocator
 	storage.ChunkManager
 	Channel
 
@@ -371,7 +372,7 @@ func (m *rendezvousFlushManager) flushBufferData(data *BufferData, segmentID Uni
 	}
 
 	// binlogs
-	start, _, err := m.allocIDBatch(uint32(len(binLogs) + len(statsBinlogs)))
+	start, _, err := m.Alloc(uint32(len(binLogs) + len(statsBinlogs)))
 	if err != nil {
 		return nil, err
 	}
@@ -387,7 +388,6 @@ func (m *rendezvousFlushManager) flushBufferData(data *BufferData, segmentID Uni
 
 		logidx := start + int64(idx)
 
-		// no error raise if alloc=false
 		k := metautil.JoinIDPath(collID, partID, segmentID, fieldID, logidx)
 
 		// [rootPath]/[insert_log]/key
@@ -413,7 +413,6 @@ func (m *rendezvousFlushManager) flushBufferData(data *BufferData, segmentID Uni
 
 		logidx := start + UniqueID(len(binLogs)+idx)
 
-		// no error raise if alloc=false
 		k := metautil.JoinIDPath(collID, partID, segmentID, fieldID, logidx)
 
 		key := path.Join(m.ChunkManager.RootPath(), common.SegmentStatslogPath, k)
@@ -458,7 +457,7 @@ func (m *rendezvousFlushManager) flushDelData(data *DelDataBuf, segmentID Unique
 		return err
 	}
 
-	logID, err := m.allocID()
+	logID, err := m.AllocOne()
 	if err != nil {
 		log.Error("failed to alloc ID", zap.Error(err))
 		return err
@@ -618,9 +617,9 @@ func (t *flushBufferDeleteTask) flushDeleteData() error {
 }
 
 // NewRendezvousFlushManager create rendezvousFlushManager with provided allocator and kv
-func NewRendezvousFlushManager(allocator allocatorInterface, cm storage.ChunkManager, channel Channel, f notifyMetaFunc, drop flushAndDropFunc) *rendezvousFlushManager {
+func NewRendezvousFlushManager(allocator allocator.Allocator, cm storage.ChunkManager, channel Channel, f notifyMetaFunc, drop flushAndDropFunc) *rendezvousFlushManager {
 	fm := &rendezvousFlushManager{
-		allocatorInterface: allocator,
+		Allocator:    allocator,
 		ChunkManager: cm,
 		notifyFunc:   f,
 		Channel:      channel,

internal/datanode/flush_manager_test.go

@@ -31,6 +31,7 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/msgpb"
 	"github.com/milvus-io/milvus-proto/go-api/schemapb"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/storage"
 	"github.com/milvus-io/milvus/internal/util/retry"
@@ -158,7 +159,8 @@ func TestRendezvousFlushManager(t *testing.T) {
 	var counter atomic.Int64
 	finish := sync.WaitGroup{}
 	finish.Add(size)
-	m := NewRendezvousFlushManager(&allocator{}, cm, newTestChannel(), func(pack *segmentFlushPack) {
+	alloc := allocator.NewMockAllocator(t)
+	m := NewRendezvousFlushManager(alloc, cm, newTestChannel(), func(pack *segmentFlushPack) {
 		counter.Inc()
 		finish.Done()
 	}, emptyFlushAndDropFunc)
@@ -199,7 +201,8 @@ func TestRendezvousFlushManager_Inject(t *testing.T) {
 	finish.Add(size)
 	var packMut sync.Mutex
 	packs := make([]*segmentFlushPack, 0, size+3)
-	m := NewRendezvousFlushManager(&allocator{}, cm, newTestChannel(), func(pack *segmentFlushPack) {
+	alloc := allocator.NewMockAllocator(t)
+	m := NewRendezvousFlushManager(alloc, cm, newTestChannel(), func(pack *segmentFlushPack) {
 		packMut.Lock()
 		packs = append(packs, pack)
 		packMut.Unlock()
@@ -297,7 +300,7 @@ func TestRendezvousFlushManager_getSegmentMeta(t *testing.T) {
 
 	channel := newTestChannel()
 	channel.collSchema = &schemapb.CollectionSchema{}
-	fm := NewRendezvousFlushManager(NewAllocatorFactory(), cm, channel, func(*segmentFlushPack) {
+	fm := NewRendezvousFlushManager(allocator.NewMockAllocator(t), cm, channel, func(*segmentFlushPack) {
 	}, emptyFlushAndDropFunc)
 
 	// non exists segment
@@ -330,7 +333,7 @@ func TestRendezvousFlushManager_waitForAllFlushQueue(t *testing.T) {
 	var counter atomic.Int64
 	var finish sync.WaitGroup
 	finish.Add(size)
-	m := NewRendezvousFlushManager(&allocator{}, cm, newTestChannel(), func(pack *segmentFlushPack) {
+	m := NewRendezvousFlushManager(allocator.NewMockAllocator(t), cm, newTestChannel(), func(pack *segmentFlushPack) {
 		counter.Inc()
 		finish.Done()
 	}, emptyFlushAndDropFunc)
@@ -402,7 +405,7 @@ func TestRendezvousFlushManager_dropMode(t *testing.T) {
 		var result []*segmentFlushPack
 		signal := make(chan struct{})
 
-		m := NewRendezvousFlushManager(&allocator{}, cm, newTestChannel(), func(pack *segmentFlushPack) {
+		m := NewRendezvousFlushManager(allocator.NewMockAllocator(t), cm, newTestChannel(), func(pack *segmentFlushPack) {
 		}, func(packs []*segmentFlushPack) {
 			mut.Lock()
 			result = packs
@@ -456,7 +459,7 @@ func TestRendezvousFlushManager_dropMode(t *testing.T) {
 		var result []*segmentFlushPack
 		signal := make(chan struct{})
 
-		m := NewRendezvousFlushManager(&allocator{}, cm, newTestChannel(), func(pack *segmentFlushPack) {
+		m := NewRendezvousFlushManager(allocator.NewMockAllocator(t), cm, newTestChannel(), func(pack *segmentFlushPack) {
 		}, func(packs []*segmentFlushPack) {
 			mut.Lock()
 			result = packs
@@ -518,7 +521,7 @@ func TestRendezvousFlushManager_close(t *testing.T) {
 	var counter atomic.Int64
 	finish := sync.WaitGroup{}
 	finish.Add(size)
-	m := NewRendezvousFlushManager(&allocator{}, cm, newTestChannel(), func(pack *segmentFlushPack) {
+	m := NewRendezvousFlushManager(allocator.NewMockAllocator(t), cm, newTestChannel(), func(pack *segmentFlushPack) {
 		counter.Inc()
 		finish.Done()
 	}, emptyFlushAndDropFunc)

internal/datanode/mock_test.go

@@ -22,8 +22,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"math"
-	"math/rand"
-	"sync"
 	"time"
 
 	"github.com/cockroachdb/errors"
@@ -46,7 +44,6 @@ import (
 	"github.com/milvus-io/milvus/internal/types"
 	"github.com/milvus-io/milvus/internal/util/dependency"
 	"github.com/milvus-io/milvus/internal/util/etcd"
-	"github.com/milvus-io/milvus/internal/util/metautil"
 	"github.com/milvus-io/milvus/internal/util/paramtable"
 	"github.com/milvus-io/milvus/internal/util/sessionutil"
 	"github.com/milvus-io/milvus/internal/util/tsoutil"
@@ -967,57 +964,6 @@ func genFlowGraphDeleteMsg(pks []primaryKey, chanName string) flowGraphMsg {
 	return *fgMsg
 }
 
-type AllocatorFactory struct {
-	sync.Mutex
-	r             *rand.Rand
-	isvalid       bool
-	random        bool
-	errAllocBatch bool
-}
-
-var _ allocatorInterface = &AllocatorFactory{}
-
-func NewAllocatorFactory(id ...UniqueID) *AllocatorFactory {
-	f := &AllocatorFactory{
-		r:       rand.New(rand.NewSource(time.Now().UnixNano())),
-		isvalid: len(id) == 0 || (len(id) > 0 && id[0] > 0),
-	}
-	return f
-}
-
-func (alloc *AllocatorFactory) allocID() (UniqueID, error) {
-	alloc.Lock()
-	defer alloc.Unlock()
-
-	if !alloc.isvalid {
-		return -1, errors.New("allocID error")
-	}
-
-	if alloc.random {
-		return alloc.r.Int63n(10000), nil
-	}
-
-	return 19530, nil
-}
-
-func (alloc *AllocatorFactory) allocIDBatch(count uint32) (UniqueID, uint32, error) {
-	if count == 0 || alloc.errAllocBatch {
-		return 0, 0, errors.New("count should be greater than zero")
-	}
-
-	start, err := alloc.allocID()
-	return start, count, err
-}
-
-func (alloc *AllocatorFactory) genKey(ids ...UniqueID) (string, error) {
-	idx, err := alloc.allocID()
-	if err != nil {
-		return "", err
-	}
-	ids = append(ids, idx)
-	return metautil.JoinIDPath(ids...), nil
-}
-
 // If id == 0, AllocID will return not successful status
 // If id == -1, AllocID will return err
 func (m *RootCoordFactory) setID(id UniqueID) {

internal/datanode/services.go

@@ -567,7 +567,7 @@ func (node *DataNode) Import(ctx context.Context, req *datapb.ImportTaskRequest)
 
 	// parse files and generate segments
 	segmentSize := Params.DataCoordCfg.SegmentMaxSize.GetAsInt64() * 1024 * 1024
-	importWrapper := importutil.NewImportWrapper(newCtx, colInfo.GetSchema(), colInfo.GetShardsNum(), segmentSize, node.rowIDAllocator,
+	importWrapper := importutil.NewImportWrapper(newCtx, colInfo.GetSchema(), colInfo.GetShardsNum(), segmentSize, node.allocator.GetIDAlloactor(),
 		node.chunkManager, importResult, reportFunc)
 	importWrapper.SetCallbackFunctions(assignSegmentFunc(node, req),
 		createBinLogsFunc(node, req, colInfo.GetSchema(), ts),
@@ -922,8 +922,7 @@ func createBinLogs(rowNum int, schema *schemapb.CollectionSchema, ts Timestamp,
 		return nil, nil, err
 	}
 
-	var alloc allocatorInterface = newAllocator(node.rootCoord)
+	start, _, err := node.allocator.Alloc(uint32(len(binLogs)))
-	start, _, err := alloc.allocIDBatch(uint32(len(binLogs)))
 	if err != nil {
 		return nil, nil, err
 	}
@@ -940,7 +939,6 @@ func createBinLogs(rowNum int, schema *schemapb.CollectionSchema, ts Timestamp,
 
 		logidx := start + int64(idx)
 
-		// no error raise if alloc=false
 		k := metautil.JoinIDPath(colID, partID, segmentID, fieldID, logidx)
 
 		key := path.Join(node.chunkManager.RootPath(), common.SegmentInsertLogPath, k)

internal/datanode/services_test.go

@@ -24,6 +24,7 @@ import (
 	"sync"
 	"testing"
 
+	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/suite"
 	clientv3 "go.etcd.io/etcd/client/v3"
 	"go.uber.org/zap"
@@ -32,7 +33,9 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
 	"github.com/milvus-io/milvus-proto/go-api/msgpb"
 	"github.com/milvus-io/milvus-proto/go-api/schemapb"
+	allocator2 "github.com/milvus-io/milvus/internal/allocator"
 	"github.com/milvus-io/milvus/internal/common"
+	"github.com/milvus-io/milvus/internal/datanode/allocator"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/mq/msgstream"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
@@ -82,6 +85,16 @@ func (s *DataNodeServicesSuite) SetupTest() {
 	err := s.node.Init()
 	s.Require().NoError(err)
 
+	alloc := &allocator.MockAllocator{}
+	alloc.EXPECT().Start().Return(nil).Maybe()
+	alloc.EXPECT().Close().Maybe()
+	alloc.EXPECT().GetIDAlloactor().Return(&allocator2.IDAllocator{}).Maybe()
+	alloc.EXPECT().Alloc(mock.Anything).Call.Return(int64(22222),
+		func(count uint32) int64 {
+			return int64(22222 + count)
+		}, nil).Maybe()
+	s.node.allocator = alloc
+
 	err = s.node.Start()
 	s.Require().NoError(err)
 

internal/querycoordv2/meta/mock_store.go

@@ -1,4 +1,4 @@
-// Code generated by mockery v2.14.0. DO NOT EDIT.
+// Code generated by mockery v2.16.0. DO NOT EDIT.
 
 package meta
 

internal/querycoordv2/mocks/mock_querynode.go

@@ -1,4 +1,4 @@
-// Code generated by mockery v2.14.0. DO NOT EDIT.
+// Code generated by mockery v2.16.0. DO NOT EDIT.
 
 package mocks
 

internal/querycoordv2/session/mock_cluster.go

@@ -1,4 +1,4 @@
-// Code generated by mockery v2.14.0. DO NOT EDIT.
+// Code generated by mockery v2.16.0. DO NOT EDIT.
 
 package session
 

internal/types/mock_querycoord.go

@@ -1,4 +1,4 @@
-// Code generated by mockery v2.14.0. DO NOT EDIT.
+// Code generated by mockery v2.16.0. DO NOT EDIT.
 
 package types
 

internal/types/mock_querynode.go

@@ -1,4 +1,4 @@
-// Code generated by mockery v2.14.0. DO NOT EDIT.
+// Code generated by mockery v2.16.0. DO NOT EDIT.
 
 package types