Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

store/copr: add a param "limit" to region cache's SplitRegionRanges #40411

Merged
merged 3 commits into from
Jan 29, 2023
Merged

store/copr: add a param "limit" to region cache's SplitRegionRanges #40411

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
c44be86
store/copr: add a param 'limit' to region cache's SplitRegionRanges
tangenta Jan 9, 2023
d5f1867
Merge branch 'master' into split-limit
ti-chi-bot Jan 29, 2023
0241f30
Merge branch 'master' into split-limit
ti-chi-bot Jan 29, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 4 additions & 4 deletions ddl/backfilling.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -489,7 +489,7 @@ func (w *backfillWorker) run(d *ddlCtx, bf backfiller, job *model.Job) {
// splitTableRanges uses PD region's key ranges to split the backfilling table key range space,
// to speed up backfilling data in table with disperse handle.
// The `t` should be a non-partitioned table or a partition.
func splitTableRanges(t table.PhysicalTable, store kv.Storage, startKey, endKey kv.Key) ([]kv.KeyRange, error) {
func splitTableRanges(t table.PhysicalTable, store kv.Storage, startKey, endKey kv.Key, limit int) ([]kv.KeyRange, error) {
logutil.BgLogger().Info("[ddl] split table range from PD",
zap.Int64("physicalTableID", t.GetPhysicalID()),
zap.String("start key", hex.EncodeToString(startKey)),
Expand All @@ -504,7 +504,7 @@ func splitTableRanges(t table.PhysicalTable, store kv.Storage, startKey, endKey
maxSleep := 10000 // ms
bo := backoff.NewBackofferWithVars(context.Background(), maxSleep, nil)
rc := copr.NewRegionCache(s.GetRegionCache())
ranges, err := rc.SplitRegionRanges(bo, []kv.KeyRange{kvRange})
ranges, err := rc.SplitRegionRanges(bo, []kv.KeyRange{kvRange}, limit)
if err != nil {
return nil, errors.Trace(err)
}
Expand Down Expand Up @@ -981,7 +981,7 @@ func (dc *ddlCtx) writePhysicalTableRecord(sessPool *sessionPool, t table.Physic
}

for {
kvRanges, err := splitTableRanges(t, reorgInfo.d.store, startKey, endKey)
kvRanges, err := splitTableRanges(t, reorgInfo.d.store, startKey, endKey, backfillTaskChanSize)
if err != nil {
return errors.Trace(err)
}
Expand Down Expand Up @@ -1093,7 +1093,7 @@ func (*ddlCtx) splitTableToBackfillJobs(sess *session, reorgInfo *reorgInfo, pTb
isFirstOps := true
bJobs := make([]*BackfillJob, 0, genTaskBatch)
for {
kvRanges, err := splitTableRanges(pTbl, reorgInfo.d.store, startKey, endKey)
kvRanges, err := splitTableRanges(pTbl, reorgInfo.d.store, startKey, endKey, genTaskBatch)
if err != nil {
return errors.Trace(err)
}
Expand Down
4 changes: 2 additions & 2 deletions store/copr/batch_coprocessor.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -567,7 +567,7 @@ func buildBatchCopTasksConsistentHash(bo *backoff.Backoffer,

for i, ranges := range rangesForEachPhysicalTable {
rangesLen += ranges.Len()
locations, err := cache.SplitKeyRangesByLocations(bo, ranges)
locations, err := cache.SplitKeyRangesByLocations(bo, ranges, UnspecifiedLimit)
if err != nil {
return nil, errors.Trace(err)
}
Expand Down Expand Up @@ -677,7 +677,7 @@ func buildBatchCopTasksCore(bo *backoff.Backoffer, store *kvStore, rangesForEach
rangesLen = 0
for i, ranges := range rangesForEachPhysicalTable {
rangesLen += ranges.Len()
locations, err := cache.SplitKeyRangesByLocations(bo, ranges)
locations, err := cache.SplitKeyRangesByLocations(bo, ranges, UnspecifiedLimit)
if err != nil {
return nil, errors.Trace(err)
}
Expand Down
21 changes: 13 additions & 8 deletions store/copr/coprocessor_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -381,46 +381,51 @@ func TestSplitRegionRanges(t *testing.T) {

bo := backoff.NewBackofferWithVars(context.Background(), 3000, nil)

ranges, err := cache.SplitRegionRanges(bo, BuildKeyRanges("a", "c"))
ranges, err := cache.SplitRegionRanges(bo, BuildKeyRanges("a", "c"), UnspecifiedLimit)
require.NoError(t, err)
require.Len(t, ranges, 1)
rangeEqual(t, ranges, "a", "c")

ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("h", "y"))
ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("h", "y"), UnspecifiedLimit)
require.NoError(t, err)
require.Len(t, ranges, 3)
rangeEqual(t, ranges, "h", "n", "n", "t", "t", "y")

ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("s", "z"))
ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("s", "z"), UnspecifiedLimit)
require.NoError(t, err)
require.Len(t, ranges, 2)
rangeEqual(t, ranges, "s", "t", "t", "z")

ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("s", "s"))
ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("s", "s"), UnspecifiedLimit)
require.NoError(t, err)
require.Len(t, ranges, 1)
rangeEqual(t, ranges, "s", "s")

ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("t", "t"))
ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("t", "t"), UnspecifiedLimit)
require.NoError(t, err)
require.Len(t, ranges, 1)
rangeEqual(t, ranges, "t", "t")

ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("t", "u"))
ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("t", "u"), UnspecifiedLimit)
require.NoError(t, err)
require.Len(t, ranges, 1)
rangeEqual(t, ranges, "t", "u")

ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("u", "z"))
ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("u", "z"), UnspecifiedLimit)
require.NoError(t, err)
require.Len(t, ranges, 1)
rangeEqual(t, ranges, "u", "z")

// min --> max
ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("a", "z"))
ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("a", "z"), UnspecifiedLimit)
require.NoError(t, err)
require.Len(t, ranges, 4)
rangeEqual(t, ranges, "a", "g", "g", "n", "n", "t", "t", "z")

ranges, err = cache.SplitRegionRanges(bo, BuildKeyRanges("a", "z"), 3)
require.NoError(t, err)
require.Len(t, ranges, 3)
rangeEqual(t, ranges, "a", "g", "g", "n", "n", "t")
}

func TestRebuild(t *testing.T) {
Expand Down
14 changes: 10 additions & 4 deletions store/copr/region_cache.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -42,10 +42,10 @@ func NewRegionCache(rc *tikv.RegionCache) *RegionCache {
}

// SplitRegionRanges gets the split ranges from pd region.
func (c *RegionCache) SplitRegionRanges(bo *Backoffer, keyRanges []kv.KeyRange) ([]kv.KeyRange, error) {
func (c *RegionCache) SplitRegionRanges(bo *Backoffer, keyRanges []kv.KeyRange, limit int) ([]kv.KeyRange, error) {
ranges := NewKeyRanges(keyRanges)

locations, err := c.SplitKeyRangesByLocations(bo, ranges)
locations, err := c.SplitKeyRangesByLocations(bo, ranges, limit)
if err != nil {
return nil, derr.ToTiDBErr(err)
}
Expand Down Expand Up @@ -122,10 +122,16 @@ func (l *LocationKeyRanges) splitKeyRangesByBuckets() []*LocationKeyRanges {
return res
}

// UnspecifiedLimit means no limit.
const UnspecifiedLimit = -1

// SplitKeyRangesByLocations splits the KeyRanges by logical info in the cache.
func (c *RegionCache) SplitKeyRangesByLocations(bo *Backoffer, ranges *KeyRanges) ([]*LocationKeyRanges, error) {
func (c *RegionCache) SplitKeyRangesByLocations(bo *Backoffer, ranges *KeyRanges, limit int) ([]*LocationKeyRanges, error) {
res := make([]*LocationKeyRanges, 0)
for ranges.Len() > 0 {
if limit != UnspecifiedLimit && len(res) >= limit {
break
}
loc, err := c.LocateKey(bo.TiKVBackoffer(), ranges.At(0).StartKey)
if err != nil {
return res, derr.ToTiDBErr(err)
Expand Down Expand Up @@ -176,7 +182,7 @@ func (c *RegionCache) SplitKeyRangesByLocations(bo *Backoffer, ranges *KeyRanges
//
// TODO(youjiali1995): Try to do it in one round and reduce allocations if bucket is not enabled.
func (c *RegionCache) SplitKeyRangesByBuckets(bo *Backoffer, ranges *KeyRanges) ([]*LocationKeyRanges, error) {
locs, err := c.SplitKeyRangesByLocations(bo, ranges)
locs, err := c.SplitKeyRangesByLocations(bo, ranges, UnspecifiedLimit)
if err != nil {
return nil, derr.ToTiDBErr(err)
}
Expand Down