mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-05 05:18:52 +08:00
309 lines
9.4 KiB
Go
309 lines
9.4 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 balance
|
|
|
|
import (
|
|
"sort"
|
|
|
|
"github.com/samber/lo"
|
|
"go.uber.org/zap"
|
|
|
|
"github.com/milvus-io/milvus/internal/querycoordv2/meta"
|
|
"github.com/milvus-io/milvus/internal/querycoordv2/session"
|
|
"github.com/milvus-io/milvus/internal/querycoordv2/task"
|
|
"github.com/milvus-io/milvus/pkg/log"
|
|
)
|
|
|
|
type RowCountBasedBalancer struct {
|
|
*RoundRobinBalancer
|
|
dist *meta.DistributionManager
|
|
meta *meta.Meta
|
|
targetMgr *meta.TargetManager
|
|
}
|
|
|
|
func (b *RowCountBasedBalancer) AssignSegment(collectionID int64, segments []*meta.Segment, nodes []int64) []SegmentAssignPlan {
|
|
nodeItems := b.convertToNodeItems(nodes)
|
|
if len(nodeItems) == 0 {
|
|
return nil
|
|
}
|
|
queue := newPriorityQueue()
|
|
for _, item := range nodeItems {
|
|
queue.push(item)
|
|
}
|
|
|
|
sort.Slice(segments, func(i, j int) bool {
|
|
return segments[i].GetNumOfRows() > segments[j].GetNumOfRows()
|
|
})
|
|
|
|
plans := make([]SegmentAssignPlan, 0, len(segments))
|
|
for _, s := range segments {
|
|
// pick the node with the least row count and allocate to it.
|
|
ni := queue.pop().(*nodeItem)
|
|
plan := SegmentAssignPlan{
|
|
From: -1,
|
|
To: ni.nodeID,
|
|
Segment: s,
|
|
}
|
|
plans = append(plans, plan)
|
|
// change node's priority and push back
|
|
p := ni.getPriority()
|
|
ni.setPriority(p + int(s.GetNumOfRows()))
|
|
queue.push(ni)
|
|
}
|
|
return plans
|
|
}
|
|
|
|
func (b *RowCountBasedBalancer) convertToNodeItems(nodeIDs []int64) []*nodeItem {
|
|
ret := make([]*nodeItem, 0, len(nodeIDs))
|
|
for _, nodeInfo := range b.getNodes(nodeIDs) {
|
|
node := nodeInfo.ID()
|
|
segments := b.dist.SegmentDistManager.GetByNode(node)
|
|
rowcnt := 0
|
|
for _, s := range segments {
|
|
rowcnt += int(s.GetNumOfRows())
|
|
}
|
|
// more row count, less priority
|
|
nodeItem := newNodeItem(rowcnt, node)
|
|
ret = append(ret, &nodeItem)
|
|
}
|
|
return ret
|
|
}
|
|
|
|
func (b *RowCountBasedBalancer) BalanceReplica(replica *meta.Replica) ([]SegmentAssignPlan, []ChannelAssignPlan) {
|
|
nodes := replica.GetNodes()
|
|
if len(nodes) < 2 {
|
|
return nil, nil
|
|
}
|
|
onlineNodesSegments := make(map[int64][]*meta.Segment)
|
|
stoppingNodesSegments := make(map[int64][]*meta.Segment)
|
|
outboundNodes := b.meta.ResourceManager.CheckOutboundNodes(replica)
|
|
|
|
totalCnt := 0
|
|
for _, nid := range nodes {
|
|
segments := b.dist.SegmentDistManager.GetByCollectionAndNode(replica.GetCollectionID(), nid)
|
|
// Only balance segments in targets
|
|
segments = lo.Filter(segments, func(segment *meta.Segment, _ int) bool {
|
|
return b.targetMgr.GetSealedSegment(segment.GetCollectionID(), segment.GetID(), meta.CurrentTarget) != nil &&
|
|
b.targetMgr.GetSealedSegment(segment.GetCollectionID(), segment.GetID(), meta.NextTarget) != nil
|
|
})
|
|
|
|
if isStopping, err := b.nodeManager.IsStoppingNode(nid); err != nil {
|
|
log.Info("not existed node", zap.Int64("nid", nid), zap.Any("segments", segments), zap.Error(err))
|
|
continue
|
|
} else if isStopping {
|
|
stoppingNodesSegments[nid] = segments
|
|
} else if outboundNodes.Contain(nid) {
|
|
// if node is stop or transfer to other rg
|
|
log.RatedInfo(10, "meet outbound node, try to move out all segment/channel",
|
|
zap.Int64("collectionID", replica.GetCollectionID()),
|
|
zap.Int64("replicaID", replica.GetCollectionID()),
|
|
zap.Int64("node", nid),
|
|
)
|
|
stoppingNodesSegments[nid] = segments
|
|
} else {
|
|
onlineNodesSegments[nid] = segments
|
|
}
|
|
|
|
for _, s := range segments {
|
|
totalCnt += int(s.GetNumOfRows())
|
|
}
|
|
}
|
|
|
|
if len(nodes) == len(stoppingNodesSegments) || len(onlineNodesSegments) == 0 {
|
|
// no available nodes to balance
|
|
return nil, nil
|
|
}
|
|
|
|
segmentsToMove := make([]*meta.Segment, 0)
|
|
for _, stopSegments := range stoppingNodesSegments {
|
|
segmentsToMove = append(segmentsToMove, stopSegments...)
|
|
}
|
|
|
|
// find nodes with less row count than average
|
|
nodesWithLessRow := newPriorityQueue()
|
|
average := totalCnt / len(onlineNodesSegments)
|
|
for node, segments := range onlineNodesSegments {
|
|
sort.Slice(segments, func(i, j int) bool {
|
|
return segments[i].GetNumOfRows() > segments[j].GetNumOfRows()
|
|
})
|
|
|
|
rowCount := 0
|
|
for _, s := range segments {
|
|
rowCount += int(s.GetNumOfRows())
|
|
if rowCount <= average {
|
|
continue
|
|
}
|
|
|
|
segmentsToMove = append(segmentsToMove, s)
|
|
}
|
|
if rowCount < average {
|
|
item := newNodeItem(rowCount, node)
|
|
nodesWithLessRow.push(&item)
|
|
}
|
|
}
|
|
|
|
segmentsToMove = lo.Filter(segmentsToMove, func(s *meta.Segment, _ int) bool {
|
|
// if the segment are redundant, skip it's balance for now
|
|
return len(b.dist.SegmentDistManager.Get(s.GetID())) == 1
|
|
})
|
|
|
|
return b.genSegmentPlan(replica, nodesWithLessRow, segmentsToMove, average), b.genChannelPlan(replica, lo.Keys(onlineNodesSegments), lo.Keys(stoppingNodesSegments))
|
|
}
|
|
|
|
func (b *RowCountBasedBalancer) genSegmentPlan(replica *meta.Replica, nodesWithLessRowCount priorityQueue, segmentsToMove []*meta.Segment, average int) []SegmentAssignPlan {
|
|
if nodesWithLessRowCount.Len() == 0 || len(segmentsToMove) == 0 {
|
|
return nil
|
|
}
|
|
|
|
sort.Slice(segmentsToMove, func(i, j int) bool {
|
|
return segmentsToMove[i].GetNumOfRows() < segmentsToMove[j].GetNumOfRows()
|
|
})
|
|
|
|
// allocate segments to those nodes with row cnt less than average
|
|
plans := make([]SegmentAssignPlan, 0)
|
|
for _, s := range segmentsToMove {
|
|
if nodesWithLessRowCount.Len() <= 0 {
|
|
break
|
|
}
|
|
|
|
node := nodesWithLessRowCount.pop().(*nodeItem)
|
|
newPriority := node.getPriority() + int(s.GetNumOfRows())
|
|
if newPriority > average {
|
|
nodesWithLessRowCount.push(node)
|
|
continue
|
|
}
|
|
|
|
plan := SegmentAssignPlan{
|
|
ReplicaID: replica.GetID(),
|
|
From: s.Node,
|
|
To: node.nodeID,
|
|
Segment: s,
|
|
}
|
|
plans = append(plans, plan)
|
|
node.setPriority(newPriority)
|
|
nodesWithLessRowCount.push(node)
|
|
}
|
|
return plans
|
|
}
|
|
|
|
func (b *RowCountBasedBalancer) genChannelPlan(replica *meta.Replica, onlineNodes []int64, offlineNodes []int64) []ChannelAssignPlan {
|
|
log.Info("balance channel",
|
|
zap.Int64s("online nodes", onlineNodes),
|
|
zap.Int64s("offline nodes", offlineNodes))
|
|
channelPlans := make([]ChannelAssignPlan, 0)
|
|
for _, nodeID := range offlineNodes {
|
|
dmChannels := b.dist.ChannelDistManager.GetByCollectionAndNode(replica.GetCollectionID(), nodeID)
|
|
plans := b.AssignChannel(dmChannels, onlineNodes)
|
|
for i := range plans {
|
|
plans[i].From = nodeID
|
|
plans[i].ReplicaID = replica.ID
|
|
}
|
|
channelPlans = append(channelPlans, plans...)
|
|
}
|
|
|
|
// if len(channelPlans) == 0 && len(onlineNodes) > 1 {
|
|
// // start to balance channels on all available nodes
|
|
// channels := b.dist.ChannelDistManager.GetByCollection(replica.CollectionID)
|
|
// channelsOnNode := lo.GroupBy(channels, func(channel *meta.DmChannel) int64 { return channel.Node })
|
|
|
|
// nodes := replica.GetNodes()
|
|
// getChannelNum := func(node int64) int {
|
|
// if channelsOnNode[node] == nil {
|
|
// return 0
|
|
// }
|
|
// return len(channelsOnNode[node])
|
|
// }
|
|
// sort.Slice(nodes, func(i, j int) bool { return getChannelNum(nodes[i]) < getChannelNum(nodes[j]) })
|
|
|
|
// start := int64(0)
|
|
// end := int64(len(nodes) - 1)
|
|
|
|
// averageChannel := int(math.Ceil(float64(len(channels)) / float64(len(onlineNodes))))
|
|
// if averageChannel == 0 || getChannelNum(nodes[start]) >= getChannelNum(nodes[end]) {
|
|
// return channelPlans
|
|
// }
|
|
|
|
// for start < end {
|
|
// // segment to move in
|
|
// targetNode := nodes[start]
|
|
// // segment to move out
|
|
// sourceNode := nodes[end]
|
|
|
|
// if len(channelsOnNode[sourceNode])-1 < averageChannel {
|
|
// break
|
|
// }
|
|
|
|
// // remove channel from end node
|
|
// selectChannel := channelsOnNode[sourceNode][0]
|
|
// channelsOnNode[sourceNode] = channelsOnNode[sourceNode][1:]
|
|
|
|
// // add channel to start node
|
|
// if channelsOnNode[targetNode] == nil {
|
|
// channelsOnNode[targetNode] = make([]*meta.DmChannel, 0)
|
|
// }
|
|
// channelsOnNode[targetNode] = append(channelsOnNode[targetNode], selectChannel)
|
|
|
|
// // generate channel plan
|
|
// plan := ChannelAssignPlan{
|
|
// Channel: selectChannel,
|
|
// From: sourceNode,
|
|
// To: targetNode,
|
|
// ReplicaID: replica.ID,
|
|
// }
|
|
// channelPlans = append(channelPlans, plan)
|
|
// for end > 0 && getChannelNum(nodes[end]) <= averageChannel {
|
|
// end--
|
|
// }
|
|
|
|
// for start < end && getChannelNum(nodes[start]) >= averageChannel {
|
|
// start++
|
|
// }
|
|
// }
|
|
|
|
// }
|
|
return channelPlans
|
|
}
|
|
|
|
func NewRowCountBasedBalancer(
|
|
scheduler task.Scheduler,
|
|
nodeManager *session.NodeManager,
|
|
dist *meta.DistributionManager,
|
|
meta *meta.Meta,
|
|
targetMgr *meta.TargetManager,
|
|
) *RowCountBasedBalancer {
|
|
return &RowCountBasedBalancer{
|
|
RoundRobinBalancer: NewRoundRobinBalancer(scheduler, nodeManager),
|
|
dist: dist,
|
|
meta: meta,
|
|
targetMgr: targetMgr,
|
|
}
|
|
}
|
|
|
|
type nodeItem struct {
|
|
baseItem
|
|
nodeID int64
|
|
}
|
|
|
|
func newNodeItem(priority int, nodeID int64) nodeItem {
|
|
return nodeItem{
|
|
baseItem: baseItem{
|
|
priority: priority,
|
|
},
|
|
nodeID: nodeID,
|
|
}
|
|
}
|