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https://gitee.com/milvus-io/milvus.git
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76 lines
2.2 KiB
Go
76 lines
2.2 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 proxy
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import (
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"context"
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"github.com/milvus-io/milvus/internal/proto/internalpb"
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"github.com/milvus-io/milvus/pkg/util/merr"
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"github.com/milvus-io/milvus/pkg/util/typeutil"
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"go.uber.org/atomic"
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)
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type RoundRobinBalancer struct {
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// request num send to each node
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nodeWorkload *typeutil.ConcurrentMap[int64, *atomic.Int64]
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}
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func NewRoundRobinBalancer() *RoundRobinBalancer {
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return &RoundRobinBalancer{
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nodeWorkload: typeutil.NewConcurrentMap[int64, *atomic.Int64](),
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}
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}
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func (b *RoundRobinBalancer) SelectNode(ctx context.Context, availableNodes []int64, cost int64) (int64, error) {
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if len(availableNodes) == 0 {
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return -1, merr.ErrNoAvailableNode
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}
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targetNode := int64(-1)
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var targetNodeWorkload *atomic.Int64
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for _, node := range availableNodes {
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workload, ok := b.nodeWorkload.Get(node)
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if !ok {
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workload = atomic.NewInt64(0)
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b.nodeWorkload.Insert(node, workload)
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}
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if targetNodeWorkload == nil || workload.Load() < targetNodeWorkload.Load() {
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targetNode = node
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targetNodeWorkload = workload
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}
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}
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targetNodeWorkload.Add(cost)
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return targetNode, nil
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}
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func (b *RoundRobinBalancer) CancelWorkload(node int64, nq int64) {
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load, ok := b.nodeWorkload.Get(node)
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if ok {
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load.Sub(nq)
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}
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}
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func (b *RoundRobinBalancer) UpdateCostMetrics(node int64, cost *internalpb.CostAggregation) {}
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func (b *RoundRobinBalancer) Start(ctx context.Context) {}
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func (b *RoundRobinBalancer) Close() {}
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