-
Notifications
You must be signed in to change notification settings - Fork 714
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
7 changed files
with
255 additions
and
5 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| // Copyright 2018 PingCAP, Inc. | ||
| // | ||
| // 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, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package schedulers | ||
|
|
||
| import ( | ||
| "math/rand" | ||
| "strconv" | ||
| "time" | ||
|
|
||
| "github.com/pingcap/pd/server/core" | ||
| "github.com/pingcap/pd/server/schedule" | ||
| "github.com/pkg/errors" | ||
| log "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| func init() { | ||
| schedule.RegisterScheduler("shuffle-hot-region", func(opController *schedule.OperatorController, args []string) (schedule.Scheduler, error) { | ||
| limit := uint64(1) | ||
| if len(args) == 1 { | ||
| l, err := strconv.ParseUint(args[0], 10, 64) | ||
| if err != nil { | ||
| return nil, errors.WithStack(err) | ||
| } | ||
| limit = l | ||
| } | ||
| return newShuffleHotRegionScheduler(opController, limit), nil | ||
| }) | ||
| } | ||
|
|
||
| // ShuffleHotRegionScheduler mainly used to test. | ||
| // It will randomly pick a hot peer, and move the peer | ||
| // to a random store, and then transfer the leader to | ||
| // the hot peer. | ||
| type shuffleHotRegionScheduler struct { | ||
| *baseScheduler | ||
| stats *storeStatistics | ||
| r *rand.Rand | ||
| limit uint64 | ||
| types []BalanceType | ||
| } | ||
|
|
||
| // newShuffleHotRegionScheduler creates an admin scheduler that random balance hot regions | ||
| func newShuffleHotRegionScheduler(opController *schedule.OperatorController, limit uint64) schedule.Scheduler { | ||
| base := newBaseScheduler(opController) | ||
| return &shuffleHotRegionScheduler{ | ||
| baseScheduler: base, | ||
| limit: limit, | ||
| stats: newStoreStaticstics(), | ||
| types: []BalanceType{hotReadRegionBalance, hotWriteRegionBalance}, | ||
| r: rand.New(rand.NewSource(time.Now().UnixNano())), | ||
| } | ||
| } | ||
|
|
||
| func (s *shuffleHotRegionScheduler) GetName() string { | ||
| return "shuffle-hot-region-scheduler" | ||
| } | ||
|
|
||
| func (s *shuffleHotRegionScheduler) GetType() string { | ||
| return "shuffle-hot-region" | ||
| } | ||
|
|
||
| func (s *shuffleHotRegionScheduler) IsScheduleAllowed(cluster schedule.Cluster) bool { | ||
| return s.opController.OperatorCount(schedule.OpHotRegion) < s.limit && | ||
| s.opController.OperatorCount(schedule.OpRegion) < cluster.GetRegionScheduleLimit() && | ||
| s.opController.OperatorCount(schedule.OpLeader) < cluster.GetLeaderScheduleLimit() | ||
| } | ||
|
|
||
| func (s *shuffleHotRegionScheduler) Schedule(cluster schedule.Cluster) []*schedule.Operator { | ||
| schedulerCounter.WithLabelValues(s.GetName(), "schedule").Inc() | ||
| i := s.r.Int() % len(s.types) | ||
| return s.dispatch(s.types[i], cluster) | ||
| } | ||
|
|
||
| func (s *shuffleHotRegionScheduler) dispatch(typ BalanceType, cluster schedule.Cluster) []*schedule.Operator { | ||
| switch typ { | ||
| case hotReadRegionBalance: | ||
| s.stats.readStatAsLeader = calcScore(cluster.RegionReadStats(), cluster, core.LeaderKind) | ||
| return s.randomSchedule(cluster, s.stats.readStatAsLeader) | ||
| case hotWriteRegionBalance: | ||
| s.stats.writeStatAsLeader = calcScore(cluster.RegionWriteStats(), cluster, core.LeaderKind) | ||
| return s.randomSchedule(cluster, s.stats.writeStatAsLeader) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (s *shuffleHotRegionScheduler) randomSchedule(cluster schedule.Cluster, storeStats core.StoreHotRegionsStat) []*schedule.Operator { | ||
| for _, stats := range storeStats { | ||
| i := s.r.Intn(stats.RegionsStat.Len()) | ||
| r := stats.RegionsStat[i] | ||
| // select src region | ||
| srcRegion := cluster.GetRegion(r.RegionID) | ||
| if srcRegion == nil || len(srcRegion.GetDownPeers()) != 0 || len(srcRegion.GetPendingPeers()) != 0 { | ||
| continue | ||
| } | ||
| srcStoreID := srcRegion.GetLeader().GetStoreId() | ||
| srcStore := cluster.GetStore(srcStoreID) | ||
| filters := []schedule.Filter{ | ||
| schedule.StoreStateFilter{MoveRegion: true}, | ||
| schedule.NewExcludedFilter(srcRegion.GetStoreIds(), srcRegion.GetStoreIds()), | ||
| schedule.NewDistinctScoreFilter(cluster.GetLocationLabels(), cluster.GetRegionStores(srcRegion), srcStore), | ||
| } | ||
| stores := cluster.GetStores() | ||
| destStoreIDs := make([]uint64, 0, len(stores)) | ||
| for _, store := range stores { | ||
| if schedule.FilterTarget(cluster, store, filters) { | ||
| continue | ||
| } | ||
| destStoreIDs = append(destStoreIDs, store.GetId()) | ||
| } | ||
| if len(destStoreIDs) == 0 { | ||
| return nil | ||
| } | ||
| // random pick a dest store | ||
| destStoreID := destStoreIDs[s.r.Intn(len(destStoreIDs))] | ||
| if destStoreID == 0 { | ||
| return nil | ||
| } | ||
| srcPeer := srcRegion.GetStorePeer(srcStoreID) | ||
| if srcPeer == nil { | ||
| return nil | ||
| } | ||
| destPeer, err := cluster.AllocPeer(destStoreID) | ||
| if err != nil { | ||
| log.Errorf("failed to allocate peer: %v", err) | ||
| return nil | ||
| } | ||
| schedulerCounter.WithLabelValues(s.GetName(), "create_operator").Inc() | ||
| st := []schedule.OperatorStep{ | ||
| schedule.AddLearner{ToStore: destStoreID, PeerID: destPeer.GetId()}, | ||
| schedule.PromoteLearner{ToStore: destStoreID, PeerID: destPeer.GetId()}, | ||
| schedule.TransferLeader{ToStore: destStoreID, FromStore: srcStoreID}, | ||
| schedule.RemovePeer{FromStore: srcRegion.GetLeader().GetStoreId()}, | ||
| } | ||
| return []*schedule.Operator{schedule.NewOperator("randomMoveHotRegion", srcRegion.GetID(), srcRegion.GetRegionEpoch(), schedule.OpRegion|schedule.OpLeader, st...)} | ||
| } | ||
| schedulerCounter.WithLabelValues(s.GetName(), "skip").Inc() | ||
| return nil | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters