milvus/internal/datacoord/policy_test.go
MrPresent-Han 77c9e33e70
support dml channel balancer on datacoord (#22324) (#22377) (#22692)
Signed-off-by: MrPresent-Han <jamesharden11122@gmail.com>
2023-03-20 10:01:56 +08:00

745 lines
20 KiB
Go

// 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 datacoord
import (
"testing"
"time"
memkv "github.com/milvus-io/milvus/internal/kv/mem"
"github.com/stretchr/testify/assert"
"stathat.com/c/consistent"
)
func fillEmptyPosition(operations ChannelOpSet) {
for _, op := range operations {
if op.Type == Add {
for range op.Channels {
op.ChannelWatchInfos = append(op.ChannelWatchInfos, nil)
}
}
}
}
func TestBufferChannelAssignPolicy(t *testing.T) {
kv := memkv.NewMemoryKV()
channels := []*channel{{Name: "chan1", CollectionID: 1}}
store := &ChannelStore{
store: kv,
channelsInfo: map[int64]*NodeChannelInfo{bufferID: {bufferID, channels}},
}
updates := BufferChannelAssignPolicy(store, 1)
assert.NotNil(t, updates)
assert.Equal(t, 2, len(updates))
assert.EqualValues(t, &ChannelOp{Type: Delete, NodeID: bufferID, Channels: channels}, updates[0])
assert.EqualValues(t, 1, updates[1].NodeID)
assert.Equal(t, Add, updates[1].Type)
assert.Equal(t, channels, updates[1].Channels)
}
func TestConsistentHashRegisterPolicy(t *testing.T) {
t.Run("first register", func(t *testing.T) {
kv := memkv.NewMemoryKV()
channels := []*channel{
{Name: "chan1", CollectionID: 1},
{Name: "chan2", CollectionID: 2},
}
store := &ChannelStore{
store: kv,
channelsInfo: map[int64]*NodeChannelInfo{bufferID: {bufferID, channels}},
}
hashring := consistent.New()
policy := ConsistentHashRegisterPolicy(hashring)
updates := policy(store, 1)
assert.NotNil(t, updates)
assert.Equal(t, 2, len(updates))
assert.EqualValues(t, &ChannelOp{Type: Delete, NodeID: bufferID, Channels: channels}, updates[0])
assert.EqualValues(t, &ChannelOp{Type: Add, NodeID: 1, Channels: channels}, updates[1])
})
t.Run("rebalance after register", func(t *testing.T) {
kv := memkv.NewMemoryKV()
channels := []*channel{
{Name: "chan1", CollectionID: 1},
{Name: "chan2", CollectionID: 2},
}
store := &ChannelStore{
store: kv,
channelsInfo: map[int64]*NodeChannelInfo{1: {1, channels}, 2: {2, []*channel{}}},
}
hashring := consistent.New()
hashring.Add(formatNodeID(1))
policy := ConsistentHashRegisterPolicy(hashring)
updates := policy(store, 2)
assert.NotNil(t, updates)
assert.Equal(t, 1, len(updates))
// No Delete operation will be generated
assert.EqualValues(t, &ChannelOp{Type: Add, NodeID: 1, Channels: []*channel{channels[0]}}, updates[0])
})
}
func TestAverageAssignPolicy(t *testing.T) {
type args struct {
store ROChannelStore
channels []*channel
}
tests := []struct {
name string
args args
want ChannelOpSet
}{
{
"test assign empty cluster",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{},
},
[]*channel{{Name: "chan1", CollectionID: 1}},
},
[]*ChannelOp{{Add, bufferID, []*channel{{Name: "chan1", CollectionID: 1}}, nil}},
},
{
"test watch same channel",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}}},
},
},
[]*channel{{Name: "chan1", CollectionID: 1}},
},
nil,
},
{
"test normal assign",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}},
2: {2, []*channel{{Name: "chan3", CollectionID: 1}}},
},
},
[]*channel{{Name: "chan4", CollectionID: 1}},
},
[]*ChannelOp{{Add, 2, []*channel{{Name: "chan4", CollectionID: 1}}, nil}},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := AverageAssignPolicy(tt.args.store, tt.args.channels)
assert.EqualValues(t, tt.want, got)
})
}
}
func TestConsistentHashChannelAssignPolicy(t *testing.T) {
type args struct {
hashring *consistent.Consistent
store ROChannelStore
channels []*channel
}
tests := []struct {
name string
args args
want ChannelOpSet
}{
{
"test assign empty cluster",
args{
consistent.New(),
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{},
},
[]*channel{{Name: "chan1", CollectionID: 1}},
},
[]*ChannelOp{{Add, bufferID, []*channel{{Name: "chan1", CollectionID: 1}}, nil}},
},
{
"test watch same channel",
args{
consistent.New(),
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}},
},
},
[]*channel{{Name: "chan1", CollectionID: 1}},
},
nil,
},
{
"test normal watch",
args{
consistent.New(),
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{1: {1, nil}, 2: {2, nil}, 3: {3, nil}},
},
[]*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}, {Name: "chan3", CollectionID: 1}},
},
[]*ChannelOp{{Add, 2, []*channel{{Name: "chan1", CollectionID: 1}}, nil}, {Add, 1, []*channel{{Name: "chan2", CollectionID: 1}}, nil}, {Add, 3, []*channel{{Name: "chan3", CollectionID: 1}}, nil}},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
policy := ConsistentHashChannelAssignPolicy(tt.args.hashring)
got := policy(tt.args.store, tt.args.channels)
assert.Equal(t, len(tt.want), len(got))
for _, op := range tt.want {
assert.Contains(t, got, op)
}
})
}
}
func TestAvgAssignUnregisteredChannels(t *testing.T) {
type args struct {
store ROChannelStore
nodeID int64
}
tests := []struct {
name string
args args
want ChannelOpSet
}{
{
"test deregister the last node",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}}},
},
},
1,
},
[]*ChannelOp{{Delete, 1, []*channel{{Name: "chan1", CollectionID: 1}}, nil}, {Add, bufferID, []*channel{{Name: "chan1", CollectionID: 1}}, nil}},
},
{
"test rebalance channels after deregister",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}}},
2: {2, []*channel{{Name: "chan2", CollectionID: 1}}},
3: {3, []*channel{}},
},
},
2,
},
[]*ChannelOp{{Delete, 2, []*channel{{Name: "chan2", CollectionID: 1}}, nil}, {Add, 3, []*channel{{Name: "chan2", CollectionID: 1}}, nil}},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := AvgAssignUnregisteredChannels(tt.args.store, tt.args.nodeID)
assert.EqualValues(t, tt.want, got)
})
}
}
func TestConsistentHashDeregisterPolicy(t *testing.T) {
type args struct {
hashring *consistent.Consistent
store ROChannelStore
nodeID int64
}
tests := []struct {
name string
args args
want ChannelOpSet
}{
{
"test deregister the last node",
args{
consistent.New(),
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}}},
},
},
1,
},
[]*ChannelOp{{Delete, 1, []*channel{{Name: "chan1", CollectionID: 1}}, nil}, {Add, bufferID, []*channel{{Name: "chan1", CollectionID: 1}}, nil}},
},
{
"rebalance after deregister",
args{
consistent.New(),
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan2", CollectionID: 1}}},
2: {2, []*channel{{Name: "chan1", CollectionID: 1}}},
3: {3, []*channel{{Name: "chan3", CollectionID: 1}}},
},
},
2,
},
[]*ChannelOp{{Delete, 2, []*channel{{Name: "chan1", CollectionID: 1}}, nil}, {Add, 1, []*channel{{Name: "chan1", CollectionID: 1}}, nil}},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
policy := ConsistentHashDeregisterPolicy(tt.args.hashring)
got := policy(tt.args.store, tt.args.nodeID)
assert.EqualValues(t, tt.want, got)
})
}
}
func TestRoundRobinReassignPolicy(t *testing.T) {
type args struct {
store ROChannelStore
reassigns []*NodeChannelInfo
}
tests := []struct {
name string
args args
want ChannelOpSet
}{
{
"test only one node",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}}},
},
},
[]*NodeChannelInfo{{1, []*channel{{Name: "chan1", CollectionID: 1}}}},
},
[]*ChannelOp{},
},
{
"test normal reassing",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}},
2: {2, []*channel{}},
},
},
[]*NodeChannelInfo{{1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}}},
},
[]*ChannelOp{{Delete, 1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}, nil}, {Add, 2, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}, nil}},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := RoundRobinReassignPolicy(tt.args.store, tt.args.reassigns)
assert.EqualValues(t, tt.want, got)
})
}
}
func TestBgCheckForChannelBalance(t *testing.T) {
type args struct {
channels []*NodeChannelInfo
timestamp time.Time
}
tests := []struct {
name string
args args
want []*NodeChannelInfo
wantErr error
}{
{
"test even distribution",
args{
[]*NodeChannelInfo{
{1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}},
{2, []*channel{{Name: "chan1", CollectionID: 2}, {Name: "chan2", CollectionID: 2}}},
{3, []*channel{{Name: "chan1", CollectionID: 3}, {Name: "chan2", CollectionID: 3}}},
},
time.Now(),
},
//there should be no reallocate
[]*NodeChannelInfo{},
nil,
},
{
"test uneven with conservative effect",
args{
[]*NodeChannelInfo{
{1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}},
{2, []*channel{}},
},
time.Now(),
},
// as we deem that the node having only one channel more than average as even, so there's no reallocation
// for this test case
[]*NodeChannelInfo{},
nil,
},
{
"test uneven with zero",
args{
[]*NodeChannelInfo{
{1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1},
{Name: "chan3", CollectionID: 1}}},
{2, []*channel{}},
},
time.Now(),
},
[]*NodeChannelInfo{{1, []*channel{{Name: "chan1", CollectionID: 1}}}},
nil,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
policy := BgBalanceCheck
got, err := policy(tt.args.channels, tt.args.timestamp)
assert.Equal(t, tt.wantErr, err)
assert.EqualValues(t, tt.want, got)
})
}
}
func TestAvgReassignPolicy(t *testing.T) {
type args struct {
store ROChannelStore
reassigns []*NodeChannelInfo
}
tests := []struct {
name string
args args
want ChannelOpSet
}{
{
"test_only_one_node",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}}},
},
},
[]*NodeChannelInfo{{1, []*channel{{Name: "chan1", CollectionID: 1}}}},
},
//as there's no available nodes except the input node, there's no reassign plan generated
[]*ChannelOp{},
},
{
"test_zero_avg",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}}},
2: {2, []*channel{}},
3: {2, []*channel{}},
4: {2, []*channel{}},
},
},
[]*NodeChannelInfo{{1, []*channel{{Name: "chan1", CollectionID: 1}}}},
},
[]*ChannelOp{
//as we use ceil to calculate the wanted average number, there should be one reassign
//though the average num less than 1
{Delete, 1, []*channel{{Name: "chan1", CollectionID: 1}}, nil},
{Add, 2, []*channel{{Name: "chan1", CollectionID: 1}}, nil}},
},
{
"test_normal_reassigning_for_one_available_nodes",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}},
2: {2, []*channel{}},
},
},
[]*NodeChannelInfo{{1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}}},
},
[]*ChannelOp{
{Delete, 1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}, nil},
{Add, 2, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}, nil}},
},
{
"test_normal_reassigning_for_multiple_available_nodes",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{
{Name: "chan1", CollectionID: 1},
{Name: "chan2", CollectionID: 1},
{Name: "chan3", CollectionID: 1},
{Name: "chan4", CollectionID: 1}}},
2: {2, []*channel{}},
3: {3, []*channel{}},
4: {4, []*channel{}},
},
},
[]*NodeChannelInfo{{1, []*channel{
{Name: "chan1", CollectionID: 1},
{Name: "chan2", CollectionID: 1},
{Name: "chan3", CollectionID: 1},
}}},
},
[]*ChannelOp{
{Delete, 1, []*channel{
{Name: "chan1", CollectionID: 1},
{Name: "chan2", CollectionID: 1},
{Name: "chan3", CollectionID: 1}},
nil},
{Add, 2, []*channel{{Name: "chan1", CollectionID: 1}}, nil},
{Add, 3, []*channel{{Name: "chan2", CollectionID: 1}}, nil},
{Add, 4, []*channel{{Name: "chan3", CollectionID: 1}}, nil},
},
},
{
"test_reassigning_for_extreme_case",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{
{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1},
{Name: "chan3", CollectionID: 1}, {Name: "chan4", CollectionID: 1},
{Name: "chan5", CollectionID: 1}, {Name: "chan6", CollectionID: 1},
{Name: "chan7", CollectionID: 1}, {Name: "chan8", CollectionID: 1},
{Name: "chan9", CollectionID: 1}, {Name: "chan10", CollectionID: 1},
{Name: "chan11", CollectionID: 1}, {Name: "chan12", CollectionID: 1},
}},
2: {2, []*channel{
{Name: "chan13", CollectionID: 1}, {Name: "chan14", CollectionID: 1},
}},
3: {3, []*channel{{Name: "chan15", CollectionID: 1}}},
4: {4, []*channel{}},
},
},
[]*NodeChannelInfo{{1, []*channel{
{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1},
{Name: "chan3", CollectionID: 1}, {Name: "chan4", CollectionID: 1},
{Name: "chan5", CollectionID: 1}, {Name: "chan6", CollectionID: 1},
{Name: "chan7", CollectionID: 1}, {Name: "chan8", CollectionID: 1},
{Name: "chan9", CollectionID: 1}, {Name: "chan10", CollectionID: 1},
{Name: "chan11", CollectionID: 1}, {Name: "chan12", CollectionID: 1},
}}},
},
[]*ChannelOp{
{Delete, 1, []*channel{
{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1},
{Name: "chan3", CollectionID: 1}, {Name: "chan4", CollectionID: 1},
{Name: "chan5", CollectionID: 1}, {Name: "chan6", CollectionID: 1},
{Name: "chan7", CollectionID: 1}, {Name: "chan8", CollectionID: 1},
{Name: "chan9", CollectionID: 1}, {Name: "chan10", CollectionID: 1},
{Name: "chan11", CollectionID: 1}, {Name: "chan12", CollectionID: 1},
}, nil},
{Add, 4, []*channel{
{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1},
{Name: "chan3", CollectionID: 1}, {Name: "chan4", CollectionID: 1},
{Name: "chan5", CollectionID: 1}}, nil},
{Add, 3, []*channel{
{Name: "chan6", CollectionID: 1}, {Name: "chan7", CollectionID: 1},
{Name: "chan8", CollectionID: 1}, {Name: "chan9", CollectionID: 1},
}, nil},
{Add, 2, []*channel{
{Name: "chan10", CollectionID: 1}, {Name: "chan11", CollectionID: 1},
{Name: "chan12", CollectionID: 1},
}, nil},
},
},
}
for _, tt := range tests {
if tt.name == "test_reassigning_for_extreme_case" ||
tt.name == "test_normal_reassigning_for_multiple_available_nodes" {
continue
}
t.Run(tt.name, func(t *testing.T) {
got := AverageReassignPolicy(tt.args.store, tt.args.reassigns)
assert.EqualValues(t, tt.want, got)
})
}
}
func TestAvgBalanceChannelPolicy(t *testing.T) {
type args struct {
store ROChannelStore
}
tests := []struct {
name string
args args
want ChannelOpSet
}{
{
"test_only_one_node",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {
1, []*channel{
{Name: "chan1", CollectionID: 1},
{Name: "chan2", CollectionID: 1},
{Name: "chan3", CollectionID: 1},
{Name: "chan4", CollectionID: 1},
},
},
2: {2, []*channel{}},
},
},
},
[]*ChannelOp{
{Add, 1, []*channel{
{Name: "chan1", CollectionID: 1},
}, nil},
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := AvgBalanceChannelPolicy(tt.args.store, time.Now())
assert.EqualValues(t, tt.want, got)
})
}
}
func TestAvgAssignRegisterPolicy(t *testing.T) {
type args struct {
store ROChannelStore
nodeID int64
}
tests := []struct {
name string
args args
want ChannelOpSet
}{
{
"test empty",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {NodeID: 1, Channels: make([]*channel, 0)},
},
},
1,
},
nil,
},
{
"test with buffer channel",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
bufferID: {bufferID, []*channel{{Name: "ch1", CollectionID: 1}}},
1: {NodeID: 1, Channels: []*channel{}},
},
},
1,
},
[]*ChannelOp{
{
Type: Delete,
NodeID: bufferID,
Channels: []*channel{{Name: "ch1", CollectionID: 1}},
},
{
Type: Add,
NodeID: 1,
Channels: []*channel{{Name: "ch1", CollectionID: 1}},
},
},
},
{
"test with avg assign",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "ch1", CollectionID: 1}, {Name: "ch2", CollectionID: 1}}},
3: {3, []*channel{}},
},
},
3,
},
[]*ChannelOp{
{
Type: Add,
NodeID: 1,
Channels: []*channel{{Name: "ch1", CollectionID: 1}},
},
},
},
{
"test with avg equals to zero",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "ch1", CollectionID: 1}}},
2: {2, []*channel{{Name: "ch3", CollectionID: 1}}},
3: {3, []*channel{}},
},
},
3,
},
nil,
},
{
"test node with empty channel",
args{
&ChannelStore{
memkv.NewMemoryKV(),
map[int64]*NodeChannelInfo{
1: {1, []*channel{{Name: "ch1", CollectionID: 1}, {Name: "ch2", CollectionID: 1}, {Name: "ch3", CollectionID: 1}}},
2: {2, []*channel{}},
3: {3, []*channel{}},
},
},
3,
},
[]*ChannelOp{
{
Type: Add,
NodeID: 1,
Channels: []*channel{{Name: "ch1", CollectionID: 1}},
},
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := AvgAssignRegisterPolicy(tt.args.store, tt.args.nodeID)
assert.EqualValues(t, tt.want, got)
})
}
}