/
makeup_down_replica.go
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/
makeup_down_replica.go
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// Copyright 2018 TiKV Project Authors.
//
// Licensed 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 cases
import (
"github.com/docker/go-units"
"github.com/pingcap/kvproto/pkg/metapb"
"github.com/tikv/pd/pkg/core"
"github.com/tikv/pd/tools/pd-simulator/simulator/info"
"github.com/tikv/pd/tools/pd-simulator/simulator/simutil"
"go.uber.org/zap"
)
func newMakeupDownReplicas() *Case {
var simCase Case
storeNum, regionNum := getStoreNum(), getRegionNum()
noEmptyStoreNum := storeNum - 1
for i := 1; i <= storeNum; i++ {
simCase.Stores = append(simCase.Stores, &Store{
ID: IDAllocator.nextID(),
Status: metapb.StoreState_Up,
})
}
for i := 0; i < storeNum*regionNum/3; i++ {
peers := []*metapb.Peer{
{Id: IDAllocator.nextID(), StoreId: uint64((i)%storeNum) + 1},
{Id: IDAllocator.nextID(), StoreId: uint64((i+1)%storeNum) + 1},
{Id: IDAllocator.nextID(), StoreId: uint64((i+2)%storeNum) + 1},
}
simCase.Regions = append(simCase.Regions, Region{
ID: IDAllocator.nextID(),
Peers: peers,
Leader: peers[0],
Size: 96 * units.MiB,
Keys: 960000,
})
}
numNodes := storeNum
down := false
e := &DeleteNodesDescriptor{}
e.Step = func(tick int64) uint64 {
if numNodes > noEmptyStoreNum && tick%100 == 0 {
numNodes--
return uint64(1)
}
if tick == 300 {
down = true
}
return 0
}
simCase.Events = []EventDescriptor{e}
simCase.Checker = func(regions *core.RegionsInfo, _ []info.StoreStats) bool {
sum := 0
regionCounts := make([]int, 0, storeNum)
for i := 1; i <= storeNum; i++ {
regionCount := regions.GetStoreRegionCount(uint64(i))
regionCounts = append(regionCounts, regionCount)
sum += regionCount
}
simutil.Logger.Info("current region counts", zap.Ints("region", regionCounts))
if down && sum < storeNum*regionNum {
// only need to print once
down = false
simutil.Logger.Error("making up replicas don't start immediately")
return false
}
res := true
threshold := 0.05
for index, regionCount := range regionCounts {
if index == 0 { // storeId == 1
continue
}
res = res && isUniform(regionCount, storeNum*regionNum/noEmptyStoreNum, threshold)
}
return res
}
return &simCase
}