ddl: check local file existence before resume checkpoint

pkg/ddl/backfilling_operators.go

@@ -829,7 +829,7 @@ func (s *indexWriteResultSink) flush() error {
 	})
 	for _, index := range s.indexes {
 		idxInfo := index.Meta()
-		_, _, err := s.backendCtx.Flush(idxInfo.ID, ingest.FlushModeForceGlobal)
+		_, _, err := s.backendCtx.Flush(idxInfo.ID, ingest.FlushModeForceFlushAndImport)
 		if err != nil {
 			if common.ErrFoundDuplicateKeys.Equal(err) {
 				err = convertToKeyExistsErr(err, idxInfo, s.tbl.Meta())

pkg/ddl/backfilling_scheduler.go

@@ -397,7 +397,7 @@ func (b *ingestBackfillScheduler) close(force bool) {
 		b.writerPool.ReleaseAndWait()
 	}
 	if b.checkpointMgr != nil {
-		b.checkpointMgr.Sync()
+		b.checkpointMgr.Flush()
 		// Get the latest status after all workers are closed so that the result is more accurate.
 		cnt, nextKey := b.checkpointMgr.Status()
 		b.sendResult(&backfillResult{
@@ -585,7 +585,7 @@ func (w *addIndexIngestWorker) HandleTask(rs IndexRecordChunk, _ func(workerpool
 		cnt, nextKey := w.checkpointMgr.Status()
 		result.totalCount = cnt
 		result.nextKey = nextKey
-		result.err = w.checkpointMgr.UpdateCurrent(rs.ID, count)
+		result.err = w.checkpointMgr.UpdateWrittenKeys(rs.ID, count)
 	} else {
 		result.addedCount = count
 		result.scanCount = count

pkg/ddl/index_cop.go

@@ -121,7 +121,7 @@ func (c *copReqSender) run() {
 		if !ok {
 			return
 		}
-		if p.checkpointMgr != nil && p.checkpointMgr.IsComplete(task.endKey) {
+		if p.checkpointMgr != nil && p.checkpointMgr.IsKeyProcessed(task.endKey) {
 			logutil.Logger(p.ctx).Info("checkpoint detected, skip a cop-request task",
 				zap.Int("task ID", task.id),
 				zap.String("task end key", hex.EncodeToString(task.endKey)))
@@ -163,7 +163,7 @@ func scanRecords(p *copReqSenderPool, task *reorgBackfillTask, se *sess.Session)
 				return err
 			}
 			if p.checkpointMgr != nil {
-				p.checkpointMgr.UpdateTotal(task.id, srcChk.NumRows(), done)
+				p.checkpointMgr.UpdateTotalKeys(task.id, srcChk.NumRows(), done)
 			}
 			idxRs := IndexRecordChunk{ID: task.id, Chunk: srcChk, Done: done}
 			rate := float64(srcChk.MemoryUsage()) / 1024.0 / 1024.0 / time.Since(startTime).Seconds()

pkg/ddl/ingest/backend.go

@@ -63,14 +63,14 @@ type BackendCtx interface {
 type FlushMode byte
 
 const (
-	// FlushModeAuto means flush when the memory table size reaches the threshold.
+	// FlushModeAuto means caller does not enforce any flush, the implementation can
+	// decide it.
 	FlushModeAuto FlushMode = iota
-	// FlushModeForceLocal means flush all data to local storage.
-	FlushModeForceLocal
-	// FlushModeForceLocalAndCheckDiskQuota means flush all data to local storage and check disk quota.
-	FlushModeForceLocalAndCheckDiskQuota
-	// FlushModeForceGlobal means import all data in local storage to global storage.
-	FlushModeForceGlobal
+	// FlushModeForceFlushNoImport means flush all data to local storage, but don't
+	// import the data to TiKV.
+	FlushModeForceFlushNoImport
+	// FlushModeForceFlushAndImport means flush and import all data to TiKV.
+	FlushModeForceFlushAndImport
 )
 
 // litBackendCtx store a backend info for add index reorg task.
@@ -183,7 +183,7 @@ func (bc *litBackendCtx) Flush(indexID int64, mode FlushMode) (flushed, imported
 		return false, false, dbterror.ErrIngestFailed.FastGenByArgs("ingest engine not found")
 	}
 
-	shouldFlush, shouldImport := bc.ShouldSync(mode)
+	shouldFlush, shouldImport := bc.checkFlush(mode)
 	if !shouldFlush {
 		return false, false, nil
 	}
@@ -268,28 +268,24 @@ func (bc *litBackendCtx) unsafeImportAndReset(ei *engineInfo) error {
 // ForceSyncFlagForTest is a flag to force sync only for test.
 var ForceSyncFlagForTest = false
 
-func (bc *litBackendCtx) ShouldSync(mode FlushMode) (shouldFlush bool, shouldImport bool) {
-	if mode == FlushModeForceGlobal || ForceSyncFlagForTest {
+func (bc *litBackendCtx) checkFlush(mode FlushMode) (shouldFlush bool, shouldImport bool) {
+	if mode == FlushModeForceFlushAndImport || ForceSyncFlagForTest {
 		return true, true
 	}
-	if mode == FlushModeForceLocal {
+	if mode == FlushModeForceFlushNoImport {
 		return true, false
 	}
 	bc.diskRoot.UpdateUsage()
 	shouldImport = bc.diskRoot.ShouldImport()
-	if mode == FlushModeForceLocalAndCheckDiskQuota {
-		shouldFlush = true
-	} else {
-		interval := bc.updateInterval
-		// This failpoint will be manually set through HTTP status port.
-		failpoint.Inject("mockSyncIntervalMs", func(val failpoint.Value) {
-			if v, ok := val.(int); ok {
-				interval = time.Duration(v) * time.Millisecond
-			}
-		})
-		shouldFlush = shouldImport ||
-			time.Since(bc.timeOfLastFlush.Load()) >= interval
-	}
+	interval := bc.updateInterval
+	// This failpoint will be manually set through HTTP status port.
+	failpoint.Inject("mockSyncIntervalMs", func(val failpoint.Value) {
+		if v, ok := val.(int); ok {
+			interval = time.Duration(v) * time.Millisecond
+		}
+	})
+	shouldFlush = shouldImport ||
+		time.Since(bc.timeOfLastFlush.Load()) >= interval
 	return shouldFlush, shouldImport
 }