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core: batch get region size (#7252) #7332

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merged 6 commits into from
Nov 8, 2023
Merged

core: batch get region size (#7252) #7332

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5e9d26f
batch get region size
rleungx Oct 25, 2023
3302cd9
add benchmark
nolouch Nov 7, 2023
85e0905
fix
nolouch Nov 7, 2023
e77fb27
lint
nolouch Nov 7, 2023
d140160
fix test
nolouch Nov 7, 2023
d9d4b55
Merge branch 'release-7.5' into cherry-pick-7252-to-release-7.5
ti-chi-bot[bot] Nov 8, 2023
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36 changes: 27 additions & 9 deletions pkg/core/region.go
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Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,10 @@ import (
"go.uber.org/zap"
)

const randomRegionMaxRetry = 10
const (
randomRegionMaxRetry = 10
scanRegionLimit = 1000
)

// errRegionIsStale is error info for region is stale.
func errRegionIsStale(region *metapb.Region, origin *metapb.Region) error {
Expand Down Expand Up @@ -1610,16 +1613,31 @@ func (r *RegionsInfo) ScanRegionWithIterator(startKey []byte, iterator func(regi

// GetRegionSizeByRange scans regions intersecting [start key, end key), returns the total region size of this range.
func (r *RegionsInfo) GetRegionSizeByRange(startKey, endKey []byte) int64 {
r.t.RLock()
defer r.t.RUnlock()
var size int64
r.tree.scanRange(startKey, func(region *RegionInfo) bool {
if len(endKey) > 0 && bytes.Compare(region.GetStartKey(), endKey) >= 0 {
return false
for {
r.t.RLock()
var cnt int
r.tree.scanRange(startKey, func(region *RegionInfo) bool {
if len(endKey) > 0 && bytes.Compare(region.GetStartKey(), endKey) >= 0 {
return false
}
if cnt >= scanRegionLimit {
return false
}
cnt++
startKey = region.GetEndKey()
size += region.GetApproximateSize()
return true
})
r.t.RUnlock()
if cnt == 0 {
break
}
size += region.GetApproximateSize()
return true
})
if len(startKey) == 0 {
break
}
}

return size
}

Expand Down
120 changes: 120 additions & 0 deletions pkg/core/region_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -18,8 +18,10 @@ import (
"crypto/rand"
"fmt"
"math"
mrand "math/rand"
"strconv"
"testing"
"time"

"github.com/pingcap/failpoint"
"github.com/pingcap/kvproto/pkg/metapb"
Expand Down Expand Up @@ -658,6 +660,124 @@ func BenchmarkRandomRegion(b *testing.B) {
}
}

func BenchmarkRandomSetRegion(b *testing.B) {
regions := NewRegionsInfo()
var items []*RegionInfo
for i := 0; i < 1000000; i++ {
peer := &metapb.Peer{StoreId: 1, Id: uint64(i + 1)}
region := NewRegionInfo(&metapb.Region{
Id: uint64(i + 1),
Peers: []*metapb.Peer{peer},
StartKey: []byte(fmt.Sprintf("%20d", i)),
EndKey: []byte(fmt.Sprintf("%20d", i+1)),
}, peer)
origin, overlaps, rangeChanged := regions.SetRegion(region)
regions.UpdateSubTree(region, origin, overlaps, rangeChanged)
items = append(items, region)
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
item := items[i%len(items)]
item.approximateKeys = int64(200000)
item.approximateSize = int64(20)
origin, overlaps, rangeChanged := regions.SetRegion(item)
regions.UpdateSubTree(item, origin, overlaps, rangeChanged)
}
}

func TestGetRegionSizeByRange(t *testing.T) {
regions := NewRegionsInfo()
nums := 1000010
for i := 0; i < nums; i++ {
peer := &metapb.Peer{StoreId: 1, Id: uint64(i + 1)}
endKey := []byte(fmt.Sprintf("%20d", i+1))
if i == nums-1 {
endKey = []byte("")
}
region := NewRegionInfo(&metapb.Region{
Id: uint64(i + 1),
Peers: []*metapb.Peer{peer},
StartKey: []byte(fmt.Sprintf("%20d", i)),
EndKey: endKey,
}, peer, SetApproximateSize(10))
origin, overlaps, rangeChanged := regions.SetRegion(region)
regions.UpdateSubTree(region, origin, overlaps, rangeChanged)
}
totalSize := regions.GetRegionSizeByRange([]byte(""), []byte(""))
require.Equal(t, int64(nums*10), totalSize)
for i := 1; i < 10; i++ {
verifyNum := nums / i
endKey := fmt.Sprintf("%20d", verifyNum)
totalSize := regions.GetRegionSizeByRange([]byte(""), []byte(endKey))
require.Equal(t, int64(verifyNum*10), totalSize)
}
}

func BenchmarkRandomSetRegionWithGetRegionSizeByRange(b *testing.B) {
regions := NewRegionsInfo()
var items []*RegionInfo
for i := 0; i < 1000000; i++ {
peer := &metapb.Peer{StoreId: 1, Id: uint64(i + 1)}
region := NewRegionInfo(&metapb.Region{
Id: uint64(i + 1),
Peers: []*metapb.Peer{peer},
StartKey: []byte(fmt.Sprintf("%20d", i)),
EndKey: []byte(fmt.Sprintf("%20d", i+1)),
}, peer, SetApproximateSize(10))
origin, overlaps, rangeChanged := regions.SetRegion(region)
regions.UpdateSubTree(region, origin, overlaps, rangeChanged)
items = append(items, region)
}
b.ResetTimer()
go func() {
for {
regions.GetRegionSizeByRange([]byte(""), []byte(""))
time.Sleep(time.Millisecond)
}
}()
for i := 0; i < b.N; i++ {
item := items[i%len(items)]
item.approximateKeys = int64(200000)
origin, overlaps, rangeChanged := regions.SetRegion(item)
regions.UpdateSubTree(item, origin, overlaps, rangeChanged)
}
}

func BenchmarkRandomSetRegionWithGetRegionSizeByRangeParallel(b *testing.B) {
regions := NewRegionsInfo()
var items []*RegionInfo
for i := 0; i < 1000000; i++ {
peer := &metapb.Peer{StoreId: 1, Id: uint64(i + 1)}
region := NewRegionInfo(&metapb.Region{
Id: uint64(i + 1),
Peers: []*metapb.Peer{peer},
StartKey: []byte(fmt.Sprintf("%20d", i)),
EndKey: []byte(fmt.Sprintf("%20d", i+1)),
}, peer)
origin, overlaps, rangeChanged := regions.SetRegion(region)
regions.UpdateSubTree(region, origin, overlaps, rangeChanged)
items = append(items, region)
}
b.ResetTimer()
go func() {
for {
regions.GetRegionSizeByRange([]byte(""), []byte(""))
time.Sleep(time.Millisecond)
}
}()

b.RunParallel(
func(pb *testing.PB) {
for pb.Next() {
item := items[mrand.Intn(len(items))]
n := item.Clone(SetApproximateSize(20))
origin, overlaps, rangeChanged := regions.SetRegion(n)
regions.UpdateSubTree(item, origin, overlaps, rangeChanged)
}
},
)
}

const keyLength = 100

func randomBytes(n int) []byte {
Expand Down
3 changes: 2 additions & 1 deletion server/cluster/cluster.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1841,12 +1841,13 @@ func (c *RaftCluster) checkStores() {
if err := c.ReadyToServe(storeID); err != nil {
log.Error("change store to serving failed",
zap.Stringer("store", store.GetMeta()),
zap.Int("region-count", c.GetTotalRegionCount()),
errs.ZapError(err))
}
} else if c.IsPrepared() {
threshold := c.getThreshold(stores, store)
log.Debug("store serving threshold", zap.Uint64("store-id", storeID), zap.Float64("threshold", threshold))
regionSize := float64(store.GetRegionSize())
log.Debug("store serving threshold", zap.Uint64("store-id", storeID), zap.Float64("threshold", threshold), zap.Float64("region-size", regionSize))
if regionSize >= threshold {
if err := c.ReadyToServe(storeID); err != nil {
log.Error("change store to serving failed",
Expand Down
6 changes: 3 additions & 3 deletions tests/server/api/api_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -914,7 +914,7 @@ func TestPreparingProgress(t *testing.T) {
tests.MustPutStore(re, cluster, store)
}
for i := 0; i < 100; i++ {
tests.MustPutRegion(re, cluster, uint64(i+1), uint64(i)%3+1, []byte(fmt.Sprintf("p%d", i)), []byte(fmt.Sprintf("%d", i+1)), core.SetApproximateSize(10))
tests.MustPutRegion(re, cluster, uint64(i+1), uint64(i)%3+1, []byte(fmt.Sprintf("%20d", i)), []byte(fmt.Sprintf("%20d", i+1)), core.SetApproximateSize(10))
}
// no store preparing
output := sendRequest(re, leader.GetAddr()+"/pd/api/v1/stores/progress?action=preparing", http.MethodGet, http.StatusNotFound)
Expand All @@ -941,8 +941,8 @@ func TestPreparingProgress(t *testing.T) {
re.Equal(math.MaxFloat64, p.LeftSeconds)

// update size
tests.MustPutRegion(re, cluster, 1000, 4, []byte(fmt.Sprintf("%d", 1000)), []byte(fmt.Sprintf("%d", 1001)), core.SetApproximateSize(10))
tests.MustPutRegion(re, cluster, 1001, 5, []byte(fmt.Sprintf("%d", 1001)), []byte(fmt.Sprintf("%d", 1002)), core.SetApproximateSize(40))
tests.MustPutRegion(re, cluster, 1000, 4, []byte(fmt.Sprintf("%20d", 1000)), []byte(fmt.Sprintf("%20d", 1001)), core.SetApproximateSize(10))
tests.MustPutRegion(re, cluster, 1001, 5, []byte(fmt.Sprintf("%20d", 1001)), []byte(fmt.Sprintf("%20d", 1002)), core.SetApproximateSize(40))
time.Sleep(2 * time.Second)
output = sendRequest(re, leader.GetAddr()+"/pd/api/v1/stores/progress?action=preparing", http.MethodGet, http.StatusOK)
re.NoError(json.Unmarshal(output, &p))
Expand Down
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