prepare_check: remove redundant check (#7217) (#7818)

ref #7016

remove redundant check in prepare_check

Signed-off-by: husharp <jinhao.hu@pingcap.com>

Co-authored-by: husharp <jinhao.hu@pingcap.com>

pkg/cluster/cluster.go

@@ -59,7 +59,4 @@ func Collect(c Cluster, region *core.RegionInfo, stores []*core.StoreInfo, hasRe
 	if hasRegionStats {
 		c.GetRegionStats().Observe(region, stores)
 	}
-	if !isPrepared && isNew {
-		c.GetCoordinator().GetPrepareChecker().Collect(region)
-	}
 }

pkg/core/region.go

@@ -1340,11 +1340,23 @@ func (r *RegionsInfo) GetStoreWriteRate(storeID uint64) (bytesRate, keysRate flo
 	return
 }
 
-// GetClusterNotFromStorageRegionsCnt gets the total count of regions that not loaded from storage anymore
+// GetClusterNotFromStorageRegionsCnt gets the `NotFromStorageRegionsCnt` count of regions that not loaded from storage anymore.
 func (r *RegionsInfo) GetClusterNotFromStorageRegionsCnt() int {
 	r.st.RLock()
 	defer r.st.RUnlock()
-	return r.tree.notFromStorageRegionsCnt
+	return r.tree.notFromStorageRegionsCount()
+}
+
+// GetNotFromStorageRegionsCntByStore gets the `NotFromStorageRegionsCnt` count of a store's leader, follower and learner by storeID.
+func (r *RegionsInfo) GetNotFromStorageRegionsCntByStore(storeID uint64) int {
+	r.st.RLock()
+	defer r.st.RUnlock()
+	return r.getNotFromStorageRegionsCntByStoreLocked(storeID)
+}
+
+// getNotFromStorageRegionsCntByStoreLocked gets the `NotFromStorageRegionsCnt` count of a store's leader, follower and learner by storeID.
+func (r *RegionsInfo) getNotFromStorageRegionsCntByStoreLocked(storeID uint64) int {
+	return r.leaders[storeID].notFromStorageRegionsCount() + r.followers[storeID].notFromStorageRegionsCount() + r.learners[storeID].notFromStorageRegionsCount()
 }
 
 // GetMetaRegions gets a set of metapb.Region from regionMap
@@ -1380,7 +1392,7 @@ func (r *RegionsInfo) GetStoreRegionCount(storeID uint64) int {
 	return r.getStoreRegionCountLocked(storeID)
 }
 
-// GetStoreRegionCount gets the total count of a store's leader, follower and learner RegionInfo by storeID
+// getStoreRegionCountLocked gets the total count of a store's leader, follower and learner RegionInfo by storeID
 func (r *RegionsInfo) getStoreRegionCountLocked(storeID uint64) int {
 	return r.leaders[storeID].length() + r.followers[storeID].length() + r.learners[storeID].length()
 }

pkg/core/region_tree.go

@@ -82,6 +82,13 @@ func (t *regionTree) length() int {
 	return t.tree.Len()
 }
 
+func (t *regionTree) notFromStorageRegionsCount() int {
+	if t == nil {
+		return 0
+	}
+	return t.notFromStorageRegionsCnt
+}
+
 // GetOverlaps returns the range items that has some intersections with the given items.
 func (t *regionTree) overlaps(item *regionItem) []*regionItem {
 	// note that Find() gets the last item that is less or equal than the item.

pkg/schedule/prepare_checker.go

@@ -25,16 +25,13 @@ import (
 
 type prepareChecker struct {
 	syncutil.RWMutex
-	reactiveRegions map[uint64]int
-	start           time.Time
-	sum             int
-	prepared        bool
+	start    time.Time
+	prepared bool
 }
 
 func newPrepareChecker() *prepareChecker {
 	return &prepareChecker{
-		start:           time.Now(),
-		reactiveRegions: make(map[uint64]int),
+		start: time.Now(),
 	}
 }
 
@@ -51,13 +48,8 @@ func (checker *prepareChecker) check(c *core.BasicCluster) bool {
 	}
 	notLoadedFromRegionsCnt := c.GetClusterNotFromStorageRegionsCnt()
 	totalRegionsCnt := c.GetTotalRegionCount()
-	if float64(notLoadedFromRegionsCnt) > float64(totalRegionsCnt)*collectFactor {
-		log.Info("meta not loaded from region number is satisfied, finish prepare checker", zap.Int("not-from-storage-region", notLoadedFromRegionsCnt), zap.Int("total-region", totalRegionsCnt))
-		checker.prepared = true
-		return true
-	}
 	// The number of active regions should be more than total region of all stores * collectFactor
-	if float64(totalRegionsCnt)*collectFactor > float64(checker.sum) {
+	if float64(totalRegionsCnt)*collectFactor > float64(notLoadedFromRegionsCnt) {
 		return false
 	}
 	for _, store := range c.GetStores() {
@@ -66,23 +58,15 @@ func (checker *prepareChecker) check(c *core.BasicCluster) bool {
 		}
 		storeID := store.GetID()
 		// For each store, the number of active regions should be more than total region of the store * collectFactor
-		if float64(c.GetStoreRegionCount(storeID))*collectFactor > float64(checker.reactiveRegions[storeID]) {
+		if float64(c.GetStoreRegionCount(storeID))*collectFactor > float64(c.GetNotFromStorageRegionsCntByStore(storeID)) {
 			return false
 		}
 	}
+	log.Info("not loaded from storage region number is satisfied, finish prepare checker", zap.Int("not-from-storage-region", notLoadedFromRegionsCnt), zap.Int("total-region", totalRegionsCnt))
 	checker.prepared = true
 	return true
 }
 
-func (checker *prepareChecker) Collect(region *core.RegionInfo) {
-	checker.Lock()
-	defer checker.Unlock()
-	for _, p := range region.GetPeers() {
-		checker.reactiveRegions[p.GetStoreId()]++
-	}
-	checker.sum++
-}
-
 func (checker *prepareChecker) IsPrepared() bool {
 	checker.RLock()
 	defer checker.RUnlock()
@@ -95,10 +79,3 @@ func (checker *prepareChecker) SetPrepared() {
 	defer checker.Unlock()
 	checker.prepared = true
 }
-
-// for test purpose
-func (checker *prepareChecker) GetSum() int {
-	checker.RLock()
-	defer checker.RUnlock()
-	return checker.sum
-}

server/cluster/cluster.go

@@ -1142,7 +1142,7 @@ func (c *RaftCluster) processRegionHeartbeat(region *core.RegionInfo) error {
 		// To prevent a concurrent heartbeat of another region from overriding the up-to-date region info by a stale one,
 		// check its validation again here.
 		//
-		// However it can't solve the race condition of concurrent heartbeats from the same region.
+		// However, it can't solve the race condition of concurrent heartbeats from the same region.
 		if overlaps, err = c.core.AtomicCheckAndPutRegion(region); err != nil {
 			return err
 		}

server/cluster/cluster_test.go

@@ -2383,7 +2383,7 @@ func (c *testCluster) LoadRegion(regionID uint64, followerStoreIDs ...uint64) er
 		peer, _ := c.AllocPeer(id)
 		region.Peers = append(region.Peers, peer)
 	}
-	return c.putRegion(core.NewRegionInfo(region, nil))
+	return c.putRegion(core.NewRegionInfo(region, nil, core.SetSource(core.Storage)))
 }
 
 func TestBasic(t *testing.T) {
@@ -2468,7 +2468,7 @@ func TestDispatch(t *testing.T) {
 
 func dispatchHeartbeat(co *schedule.Coordinator, region *core.RegionInfo, stream hbstream.HeartbeatStream) error {
 	co.GetHeartbeatStreams().BindStream(region.GetLeader().GetStoreId(), stream)
-	if err := co.GetCluster().(*RaftCluster).putRegion(region.Clone()); err != nil {
+	if err := co.GetCluster().(*RaftCluster).putRegion(region.Clone(core.SetSource(core.Heartbeat))); err != nil {
 		return err
 	}
 	co.GetOperatorController().Dispatch(region, operator.DispatchFromHeartBeat, nil)
@@ -2942,14 +2942,14 @@ func TestShouldRun(t *testing.T) {
 
 	for _, testCase := range testCases {
 		r := tc.GetRegion(testCase.regionID)
-		nr := r.Clone(core.WithLeader(r.GetPeers()[0]))
+		nr := r.Clone(core.WithLeader(r.GetPeers()[0]), core.SetSource(core.Heartbeat))
 		re.NoError(tc.processRegionHeartbeat(nr))
 		re.Equal(testCase.ShouldRun, co.ShouldRun())
 	}
 	nr := &metapb.Region{Id: 6, Peers: []*metapb.Peer{}}
-	newRegion := core.NewRegionInfo(nr, nil)
+	newRegion := core.NewRegionInfo(nr, nil, core.SetSource(core.Heartbeat))
 	re.Error(tc.processRegionHeartbeat(newRegion))
-	re.Equal(7, co.GetPrepareChecker().GetSum())
+	re.Equal(7, tc.core.GetClusterNotFromStorageRegionsCnt())
 }
 
 func TestShouldRunWithNonLeaderRegions(t *testing.T) {
@@ -2985,14 +2985,14 @@ func TestShouldRunWithNonLeaderRegions(t *testing.T) {
 
 	for _, testCase := range testCases {
 		r := tc.GetRegion(testCase.regionID)
-		nr := r.Clone(core.WithLeader(r.GetPeers()[0]))
+		nr := r.Clone(core.WithLeader(r.GetPeers()[0]), core.SetSource(core.Heartbeat))
 		re.NoError(tc.processRegionHeartbeat(nr))
 		re.Equal(testCase.ShouldRun, co.ShouldRun())
 	}
 	nr := &metapb.Region{Id: 9, Peers: []*metapb.Peer{}}
-	newRegion := core.NewRegionInfo(nr, nil)
+	newRegion := core.NewRegionInfo(nr, nil, core.SetSource(core.Heartbeat))
 	re.Error(tc.processRegionHeartbeat(newRegion))
-	re.Equal(9, co.GetPrepareChecker().GetSum())
+	re.Equal(9, tc.core.GetClusterNotFromStorageRegionsCnt())
 
 	// Now, after server is prepared, there exist some regions with no leader.
 	re.Equal(uint64(0), tc.GetRegion(10).GetLeader().GetStoreId())
@@ -3262,7 +3262,6 @@ func TestRestart(t *testing.T) {
 	re.NoError(tc.addRegionStore(3, 3))
 	re.NoError(tc.addLeaderRegion(1, 1))
 	region := tc.GetRegion(1)
-	co.GetPrepareChecker().Collect(region)
 
 	// Add 1 replica on store 2.
 	stream := mockhbstream.NewHeartbeatStream()
@@ -3276,7 +3275,6 @@ func TestRestart(t *testing.T) {
 
 	// Recreate coordinator then add another replica on store 3.
 	co = schedule.NewCoordinator(ctx, tc.RaftCluster, hbStreams)
-	co.GetPrepareChecker().Collect(region)
 	co.Run()
 	re.NoError(dispatchHeartbeat(co, region, stream))
 	region = waitAddLearner(re, stream, region, 3)

tests/pdctl/scheduler/scheduler_test.go

@@ -505,7 +505,7 @@ func (suite *schedulerTestSuite) checkSchedulerDiagnostic(cluster *tests.TestClu
 		tests.MustPutStore(re, cluster, store)
 	}
 
-	// note: because pdqsort is a unstable sort algorithm, set ApproximateSize for this region.
+	// note: because pdqsort is an unstable sort algorithm, set ApproximateSize for this region.
 	tests.MustPutRegion(re, cluster, 1, 1, []byte("a"), []byte("b"), core.SetApproximateSize(10))
 	time.Sleep(3 * time.Second)
 

tests/server/cluster/cluster_test.go

@@ -1402,7 +1402,7 @@ func putRegionWithLeader(re *require.Assertions, rc *cluster.RaftCluster, id id.
 			StartKey: []byte{byte(i)},
 			EndKey:   []byte{byte(i + 1)},
 		}
-		rc.HandleRegionHeartbeat(core.NewRegionInfo(region, region.Peers[0]))
+		rc.HandleRegionHeartbeat(core.NewRegionInfo(region, region.Peers[0], core.SetSource(core.Heartbeat)))
 	}
 
 	time.Sleep(50 * time.Millisecond)

tests/testutil.go

@@ -197,6 +197,7 @@ func MustPutRegion(re *require.Assertions, cluster *TestCluster, regionID, store
 		Peers:       []*metapb.Peer{leader},
 		RegionEpoch: &metapb.RegionEpoch{ConfVer: 1, Version: 1},
 	}
+	opts = append(opts, core.SetSource(core.Heartbeat))
 	r := core.NewRegionInfo(metaRegion, leader, opts...)
 	MustPutRegionInfo(re, cluster, r)
 	return r