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87 lines
2.9 KiB
Go
87 lines
2.9 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package querycoord
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import (
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"context"
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"errors"
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"sort"
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"time"
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"go.uber.org/zap"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/proto/querypb"
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)
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func defaultChannelAllocatePolicy() ChannelAllocatePolicy {
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return shuffleChannelsToQueryNode
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}
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// ChannelAllocatePolicy helper function definition to allocate dmChannel to queryNode
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type ChannelAllocatePolicy func(ctx context.Context, reqs []*querypb.WatchDmChannelsRequest, cluster Cluster, metaCache Meta, wait bool, excludeNodeIDs []int64) error
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func shuffleChannelsToQueryNode(ctx context.Context, reqs []*querypb.WatchDmChannelsRequest, cluster Cluster, metaCache Meta, wait bool, excludeNodeIDs []int64) error {
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if len(reqs) == 0 {
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return nil
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}
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for {
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onlineNodeIDs := cluster.onlineNodeIDs()
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if len(onlineNodeIDs) == 0 {
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err := errors.New("no online QueryNode to allocate")
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log.Error("shuffleChannelsToQueryNode failed", zap.Error(err))
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if !wait {
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return err
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}
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time.Sleep(shuffleWaitInterval)
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continue
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}
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var availableNodeIDs []int64
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nodeID2NumChannels := make(map[int64]int)
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for _, nodeID := range onlineNodeIDs {
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// nodeID in excludeNodeIDs
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if nodeIncluded(nodeID, excludeNodeIDs) {
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continue
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}
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watchedChannelInfos := metaCache.getDmChannelInfosByNodeID(nodeID)
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nodeID2NumChannels[nodeID] = len(watchedChannelInfos)
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availableNodeIDs = append(availableNodeIDs, nodeID)
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}
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if len(availableNodeIDs) > 0 {
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log.Debug("shuffleChannelsToQueryNode: shuffle channel to available QueryNode", zap.Int64s("available nodeIDs", availableNodeIDs))
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for _, req := range reqs {
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sort.Slice(availableNodeIDs, func(i, j int) bool {
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return nodeID2NumChannels[availableNodeIDs[i]] < nodeID2NumChannels[availableNodeIDs[j]]
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})
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selectedNodeID := availableNodeIDs[0]
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req.NodeID = selectedNodeID
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nodeID2NumChannels[selectedNodeID]++
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}
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return nil
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}
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if !wait {
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err := errors.New("no available queryNode to allocate")
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log.Error("shuffleChannelsToQueryNode failed", zap.Int64s("online nodeIDs", onlineNodeIDs), zap.Int64s("exclude nodeIDs", excludeNodeIDs), zap.Error(err))
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return err
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}
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time.Sleep(shuffleWaitInterval)
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}
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}
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