mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-11-30 02:48:45 +08:00
76 lines
2.2 KiB
Go
76 lines
2.2 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 proxy
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/milvus-io/milvus/internal/proto/internalpb"
|
|
"github.com/milvus-io/milvus/pkg/util/merr"
|
|
"github.com/milvus-io/milvus/pkg/util/typeutil"
|
|
"go.uber.org/atomic"
|
|
)
|
|
|
|
type RoundRobinBalancer struct {
|
|
// request num send to each node
|
|
nodeWorkload *typeutil.ConcurrentMap[int64, *atomic.Int64]
|
|
}
|
|
|
|
func NewRoundRobinBalancer() *RoundRobinBalancer {
|
|
return &RoundRobinBalancer{
|
|
nodeWorkload: typeutil.NewConcurrentMap[int64, *atomic.Int64](),
|
|
}
|
|
}
|
|
|
|
func (b *RoundRobinBalancer) SelectNode(ctx context.Context, availableNodes []int64, cost int64) (int64, error) {
|
|
if len(availableNodes) == 0 {
|
|
return -1, merr.ErrNodeNotAvailable
|
|
}
|
|
|
|
targetNode := int64(-1)
|
|
var targetNodeWorkload *atomic.Int64
|
|
for _, node := range availableNodes {
|
|
workload, ok := b.nodeWorkload.Get(node)
|
|
|
|
if !ok {
|
|
workload = atomic.NewInt64(0)
|
|
b.nodeWorkload.Insert(node, workload)
|
|
}
|
|
|
|
if targetNodeWorkload == nil || workload.Load() < targetNodeWorkload.Load() {
|
|
targetNode = node
|
|
targetNodeWorkload = workload
|
|
}
|
|
}
|
|
|
|
targetNodeWorkload.Add(cost)
|
|
return targetNode, nil
|
|
}
|
|
|
|
func (b *RoundRobinBalancer) CancelWorkload(node int64, nq int64) {
|
|
load, ok := b.nodeWorkload.Get(node)
|
|
|
|
if ok {
|
|
load.Sub(nq)
|
|
}
|
|
}
|
|
|
|
func (b *RoundRobinBalancer) UpdateCostMetrics(node int64, cost *internalpb.CostAggregation) {}
|
|
|
|
func (b *RoundRobinBalancer) Start(ctx context.Context) {}
|
|
|
|
func (b *RoundRobinBalancer) Close() {}
|