// 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 proxy import ( "context" "go.uber.org/atomic" "github.com/milvus-io/milvus/internal/proto/internalpb" "github.com/milvus-io/milvus/pkg/util/merr" ) type RoundRobinBalancer struct { idx atomic.Int64 } func NewRoundRobinBalancer() *RoundRobinBalancer { return &RoundRobinBalancer{} } func (b *RoundRobinBalancer) SelectNode(ctx context.Context, availableNodes []int64, cost int64) (int64, error) { if len(availableNodes) == 0 { return -1, merr.ErrNodeNotAvailable } idx := b.idx.Inc() return availableNodes[int(idx)%len(availableNodes)], nil } func (b *RoundRobinBalancer) CancelWorkload(node int64, nq int64) { } func (b *RoundRobinBalancer) UpdateCostMetrics(node int64, cost *internalpb.CostAggregation) {} func (b *RoundRobinBalancer) Start(ctx context.Context) {} func (b *RoundRobinBalancer) Close() {}