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May 22, 2025
+4,693 −3,338
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enhance: Optimize shard serviceable mechanism #41937

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40 changes: 27 additions & 13 deletions internal/querycoordv2/balance/channel_level_score_balancer_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -291,11 +291,18 @@ func (suite *ChannelLevelScoreBalancerTestSuite) TestAssignSegmentWithGrowing()
defer paramtable.Get().Reset(paramtable.Get().QueryCoordCfg.DelegatorMemoryOverloadFactor.Key)

// mock 50 growing row count in node 1, which is delegator, expect all segment assign to node 2
leaderView := &meta.LeaderView{
ID: 1,
CollectionID: 1,
}
suite.balancer.dist.LeaderViewManager.Update(1, leaderView)
suite.balancer.dist.ChannelDistManager.Update(1, &meta.DmChannel{
VchannelInfo: &datapb.VchannelInfo{
CollectionID: 1,
ChannelName: "v1",
},
Node: 1,
View: &meta.LeaderView{
ID: 1,
CollectionID: 1,
NumOfGrowingRows: 50,
},
})
plans := balancer.AssignSegment(ctx, 1, toAssign, lo.Keys(distributions), false)
for _, p := range plans {
suite.Equal(int64(2), p.To)
Expand Down Expand Up @@ -752,12 +759,12 @@ func (suite *ChannelLevelScoreBalancerTestSuite) TestMultiReplicaBalance() {
},
channelDist: map[int64][]*meta.DmChannel{
1: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel1"}, Node: 1},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel2"}, Node: 1},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel1"}, Node: 1, View: &meta.LeaderView{ID: 1, CollectionID: 1}},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel2"}, Node: 1, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
},
3: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel3"}, Node: 3},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel4"}, Node: 3},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel3"}, Node: 3, View: &meta.LeaderView{ID: 3, CollectionID: 1}},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel4"}, Node: 3, View: &meta.LeaderView{ID: 4, CollectionID: 1}},
},
},
expectPlans: []SegmentAssignPlan{},
Expand Down Expand Up @@ -815,10 +822,10 @@ func (suite *ChannelLevelScoreBalancerTestSuite) TestMultiReplicaBalance() {
suite.Len(channelPlans, 2)

// mock new distribution after channel balance
balancer.dist.ChannelDistManager.Update(1, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel1"}, Node: 1})
balancer.dist.ChannelDistManager.Update(2, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel2"}, Node: 2})
balancer.dist.ChannelDistManager.Update(3, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel3"}, Node: 3})
balancer.dist.ChannelDistManager.Update(4, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel4"}, Node: 4})
balancer.dist.ChannelDistManager.Update(1, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel1"}, Node: 1, View: &meta.LeaderView{ID: 1, CollectionID: 1}})
balancer.dist.ChannelDistManager.Update(2, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel2"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}})
balancer.dist.ChannelDistManager.Update(3, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel3"}, Node: 3, View: &meta.LeaderView{ID: 3, CollectionID: 1}})
balancer.dist.ChannelDistManager.Update(4, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel4"}, Node: 4, View: &meta.LeaderView{ID: 4, CollectionID: 1}})

// expected to balance segment
segmentPlans, channelPlans = suite.getCollectionBalancePlans(balancer, c.collectionID)
Expand Down Expand Up @@ -909,6 +916,7 @@ func (suite *ChannelLevelScoreBalancerTestSuite) TestExclusiveChannelBalance_Cha
ChannelName: "channel2",
},
Node: ch1Nodes[0],
View: &meta.LeaderView{ID: 2, CollectionID: collectionID},
},
}...)

Expand Down Expand Up @@ -984,6 +992,7 @@ func (suite *ChannelLevelScoreBalancerTestSuite) TestExclusiveChannelBalance_Seg
ChannelName: "channel1",
},
Node: ch1Nodes[0],
View: &meta.LeaderView{ID: ch1Nodes[0], CollectionID: collectionID},
},
}...)

Expand All @@ -994,6 +1003,7 @@ func (suite *ChannelLevelScoreBalancerTestSuite) TestExclusiveChannelBalance_Seg
ChannelName: "channel2",
},
Node: ch2Nodes[0],
View: &meta.LeaderView{ID: ch2Nodes[0], CollectionID: collectionID},
},
}...)

Expand Down Expand Up @@ -1082,6 +1092,7 @@ func (suite *ChannelLevelScoreBalancerTestSuite) TestExclusiveChannelBalance_Nod
ChannelName: "channel1",
},
Node: ch1Nodes[0],
View: &meta.LeaderView{ID: ch1Nodes[0], CollectionID: collectionID},
},
}...)

Expand All @@ -1092,6 +1103,7 @@ func (suite *ChannelLevelScoreBalancerTestSuite) TestExclusiveChannelBalance_Nod
ChannelName: "channel2",
},
Node: ch2Nodes[0],
View: &meta.LeaderView{ID: ch2Nodes[0], CollectionID: collectionID},
},
}...)

Expand Down Expand Up @@ -1207,6 +1219,7 @@ func (suite *ChannelLevelScoreBalancerTestSuite) TestExclusiveChannelBalance_Seg
ChannelName: "channel1",
},
Node: ch1Nodes[0],
View: &meta.LeaderView{ID: ch1Nodes[0], CollectionID: collectionID},
},
}...)

Expand All @@ -1217,6 +1230,7 @@ func (suite *ChannelLevelScoreBalancerTestSuite) TestExclusiveChannelBalance_Seg
ChannelName: "channel2",
},
Node: ch2Nodes[0],
View: &meta.LeaderView{ID: ch2Nodes[0], CollectionID: collectionID},
},
}...)

Expand Down
2 changes: 1 addition & 1 deletion internal/querycoordv2/balance/report.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -55,7 +55,7 @@ func (br *balanceReport) SetMemoryFactor(node int64, memoryFactor float64) {
}
}

func (br *balanceReport) SetDeletagorScore(node int64, delegatorScore float64) {
func (br *balanceReport) SetDelegatorScore(node int64, delegatorScore float64) {
nodeItem, ok := br.nodeItems[node]
if ok {
nodeItem.delegatorScore = delegatorScore
Expand Down
6 changes: 3 additions & 3 deletions internal/querycoordv2/balance/rowcount_based_balancer.go
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -150,9 +150,9 @@ func (b *RowCountBasedBalancer) convertToNodeItemsBySegment(nodeIDs []int64) []*
}

// calculate growing segment row count on node
views := b.dist.LeaderViewManager.GetByFilter(meta.WithNodeID2LeaderView(node))
for _, view := range views {
rowcnt += int(view.NumOfGrowingRows)
channels := b.dist.ChannelDistManager.GetByFilter(meta.WithNodeID2Channel(node))
for _, channel := range channels {
rowcnt += int(channel.View.NumOfGrowingRows)
}

// calculate executing task cost in scheduler
Expand Down
104 changes: 64 additions & 40 deletions internal/querycoordv2/balance/rowcount_based_balancer_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -250,10 +250,10 @@ func (suite *RowCountBasedBalancerTestSuite) TestBalance() {
},
distributionChannels: map[int64][]*meta.DmChannel{
2: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
},
3: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 3},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 3, View: &meta.LeaderView{ID: 3, CollectionID: 1}},
},
},
expectPlans: []SegmentAssignPlan{},
Expand All @@ -280,10 +280,10 @@ func (suite *RowCountBasedBalancerTestSuite) TestBalance() {
},
distributionChannels: map[int64][]*meta.DmChannel{
2: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
},
1: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 1},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 1, View: &meta.LeaderView{ID: 3, CollectionID: 1}},
},
},
expectPlans: []SegmentAssignPlan{
Expand All @@ -301,8 +301,8 @@ func (suite *RowCountBasedBalancerTestSuite) TestBalance() {
distributions: map[int64][]*meta.Segment{},
distributionChannels: map[int64][]*meta.DmChannel{
2: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 2, View: &meta.LeaderView{ID: 3, CollectionID: 1}},
},
3: {},
},
Expand All @@ -320,14 +320,14 @@ func (suite *RowCountBasedBalancerTestSuite) TestBalance() {
distributions: map[int64][]*meta.Segment{},
distributionChannels: map[int64][]*meta.DmChannel{
1: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v1"}, Node: 1},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 1},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v1"}, Node: 1, View: &meta.LeaderView{ID: 1, CollectionID: 1, Channel: "v1", Status: &querypb.LeaderViewStatus{Serviceable: true}}},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 1, View: &meta.LeaderView{ID: 2, CollectionID: 1, Channel: "v2", Status: &querypb.LeaderViewStatus{Serviceable: true}}},
},
2: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 2, View: &meta.LeaderView{ID: 3, CollectionID: 1}},
},
3: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v4"}, Node: 3},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v4"}, Node: 3, View: &meta.LeaderView{ID: 4, CollectionID: 1}},
},
},
expectPlans: []SegmentAssignPlan{},
Expand All @@ -342,8 +342,8 @@ func (suite *RowCountBasedBalancerTestSuite) TestBalance() {
distributions: map[int64][]*meta.Segment{},
distributionChannels: map[int64][]*meta.DmChannel{
1: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v1"}, Node: 1},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 1},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v1"}, Node: 1, View: &meta.LeaderView{ID: 1, CollectionID: 1, Channel: "v1", Status: &querypb.LeaderViewStatus{Serviceable: true}}},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 1, View: &meta.LeaderView{ID: 2, CollectionID: 1, Channel: "v2", Status: &querypb.LeaderViewStatus{Serviceable: true}}},
},
2: {},
3: {},
Expand Down Expand Up @@ -443,8 +443,6 @@ func (suite *RowCountBasedBalancerTestSuite) TestBalance() {
assertChannelAssignPlanElementMatch(&suite.Suite, c.expectChannelPlans, channelPlans, true)
}

// clear distribution

for _, node := range c.nodes {
balancer.meta.ResourceManager.HandleNodeDown(ctx, node)
balancer.nodeManager.Remove(node)
Expand Down Expand Up @@ -535,7 +533,7 @@ func (suite *RowCountBasedBalancerTestSuite) TestBalanceOnPartStopping() {
},
distributionChannels: map[int64][]*meta.DmChannel{
2: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
},
},
expectPlans: []SegmentAssignPlan{
Expand Down Expand Up @@ -595,10 +593,10 @@ func (suite *RowCountBasedBalancerTestSuite) TestBalanceOnPartStopping() {
},
distributionChannels: map[int64][]*meta.DmChannel{
2: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
},
3: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 3},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 3, View: &meta.LeaderView{ID: 3, CollectionID: 1}},
},
},
expectPlans: []SegmentAssignPlan{},
Expand Down Expand Up @@ -688,10 +686,10 @@ func (suite *RowCountBasedBalancerTestSuite) TestBalanceOutboundNodes() {
},
distributionChannels: map[int64][]*meta.DmChannel{
2: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
},
3: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 3},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 3, View: &meta.LeaderView{ID: 3, CollectionID: 1}},
},
},
expectPlans: []SegmentAssignPlan{},
Expand All @@ -718,10 +716,10 @@ func (suite *RowCountBasedBalancerTestSuite) TestBalanceOutboundNodes() {
},
distributionChannels: map[int64][]*meta.DmChannel{
2: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
},
1: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 1},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 1, View: &meta.LeaderView{ID: 3, CollectionID: 1}},
},
},
expectPlans: []SegmentAssignPlan{
Expand Down Expand Up @@ -897,12 +895,18 @@ func (suite *RowCountBasedBalancerTestSuite) TestAssignSegmentWithGrowing() {
}

// mock 50 growing row count in node 1, which is delegator, expect all segment assign to node 2
leaderView := &meta.LeaderView{
ID: 1,
CollectionID: 1,
NumOfGrowingRows: 50,
}
suite.balancer.dist.LeaderViewManager.Update(1, leaderView)
suite.balancer.dist.ChannelDistManager.Update(1, &meta.DmChannel{
VchannelInfo: &datapb.VchannelInfo{
CollectionID: 1,
ChannelName: "v1",
},
Node: 1,
View: &meta.LeaderView{
ID: 1,
CollectionID: 1,
NumOfGrowingRows: 50,
},
})
plans := balancer.AssignSegment(ctx, 1, toAssign, lo.Keys(distributions), false)
for _, p := range plans {
suite.Equal(int64(2), p.To)
Expand Down Expand Up @@ -934,14 +938,18 @@ func (suite *RowCountBasedBalancerTestSuite) TestDisableBalanceChannel() {
distributions: map[int64][]*meta.Segment{},
distributionChannels: map[int64][]*meta.DmChannel{
2: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
},
3: {},
},
expectPlans: []SegmentAssignPlan{},
expectChannelPlans: []ChannelAssignPlan{
{Channel: &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 2}, From: 2, To: 3, Replica: newReplicaDefaultRG(1)},
{Channel: &meta.DmChannel{
VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"},
Node: 2,
View: &meta.LeaderView{ID: 3, CollectionID: 1},
}, From: 2, To: 3, Replica: newReplicaDefaultRG(1)},
},
enableBalanceChannel: true,
},
Expand All @@ -955,8 +963,8 @@ func (suite *RowCountBasedBalancerTestSuite) TestDisableBalanceChannel() {
distributions: map[int64][]*meta.Segment{},
distributionChannels: map[int64][]*meta.DmChannel{
2: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 2},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v2"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "v3"}, Node: 2, View: &meta.LeaderView{ID: 2, CollectionID: 1}},
},
3: {},
},
Expand Down Expand Up @@ -1099,12 +1107,12 @@ func (suite *RowCountBasedBalancerTestSuite) TestMultiReplicaBalance() {
},
channelDist: map[int64][]*meta.DmChannel{
1: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel1"}, Node: 1},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel2"}, Node: 1},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel1"}, Node: 1, View: &meta.LeaderView{ID: 1, CollectionID: 1}},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel2"}, Node: 1, View: &meta.LeaderView{ID: 1, CollectionID: 1}},
},
3: {
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel3"}, Node: 3},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel4"}, Node: 3},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel3"}, Node: 3, View: &meta.LeaderView{ID: 3, CollectionID: 1}},
{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel4"}, Node: 3, View: &meta.LeaderView{ID: 3, CollectionID: 1}},
},
},
expectPlans: []SegmentAssignPlan{},
Expand Down Expand Up @@ -1162,10 +1170,26 @@ func (suite *RowCountBasedBalancerTestSuite) TestMultiReplicaBalance() {
suite.Len(channelPlans, 2)

// mock new distribution after channel balance
balancer.dist.ChannelDistManager.Update(1, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel1"}, Node: 1})
balancer.dist.ChannelDistManager.Update(2, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel2"}, Node: 2})
balancer.dist.ChannelDistManager.Update(3, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel3"}, Node: 3})
balancer.dist.ChannelDistManager.Update(4, &meta.DmChannel{VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel4"}, Node: 4})
balancer.dist.ChannelDistManager.Update(1, &meta.DmChannel{
VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel1"},
Node: 1,
View: &meta.LeaderView{ID: 1, CollectionID: 1},
})
balancer.dist.ChannelDistManager.Update(2, &meta.DmChannel{
VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel2"},
Node: 2,
View: &meta.LeaderView{ID: 2, CollectionID: 1},
})
balancer.dist.ChannelDistManager.Update(3, &meta.DmChannel{
VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel3"},
Node: 3,
View: &meta.LeaderView{ID: 3, CollectionID: 1},
})
balancer.dist.ChannelDistManager.Update(4, &meta.DmChannel{
VchannelInfo: &datapb.VchannelInfo{CollectionID: 1, ChannelName: "channel4"},
Node: 4,
View: &meta.LeaderView{ID: 4, CollectionID: 1},
})

// expected to balance segment
segmentPlans, channelPlans = suite.getCollectionBalancePlans(balancer, c.collectionID)
Expand Down
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