restore: write index kv pairs and data kv pairs to separate engine

cmd/tidb-lightning-ctl/main.go

@@ -176,8 +176,8 @@ func checkpointErrorDestroy(ctx context.Context, cfg *config.Config, tableName s
 
 	for _, table := range targetTables {
 		for engineID := 0; engineID < table.EnginesCount; engineID++ {
-			fmt.Fprintln(os.Stderr, "Closing and cleaning up engine:", table.TableName, engineID)
-			closedEngine, err := importer.UnsafeCloseEngine(ctx, table.TableName, engineID)
+			fmt.Fprintln(os.Stderr, "Closing and cleaning up engine:", table.TableName, int32(engineID))
+			closedEngine, err := importer.UnsafeCloseEngine(ctx, table.TableName, int32(engineID))
 			if err != nil {
 				fmt.Fprintln(os.Stderr, "* Encountered error while closing engine:", err)
 				lastErr = err

lightning/config/config.go

@@ -83,6 +83,7 @@ func (c *Config) String() string {
 type Lightning struct {
 	common.LogConfig
 	TableConcurrency  int  `toml:"table-concurrency" json:"table-concurrency"`
+	IndexConcurrency  int  `toml:"index-concurrency" json:"index-concurrency"`
 	RegionConcurrency int  `toml:"region-concurrency" json:"region-concurrency"`
 	IOConcurrency     int  `toml:"io-concurrency" json:"io-concurrency"`
 	ProfilePort       int  `toml:"pprof-port" json:"pprof-port"`
@@ -91,10 +92,10 @@ type Lightning struct {
 
 // PostRestore has some options which will be executed after kv restored.
 type PostRestore struct {
-	Level1Compact *bool `toml:"level-1-compact" json:"level-1-compact"`
-	Compact       bool  `toml:"compact" json:"compact"`
-	Checksum      bool  `toml:"checksum" json:"checksum"`
-	Analyze       bool  `toml:"analyze" json:"analyze"`
+	Level1Compact bool `toml:"level-1-compact" json:"level-1-compact"`
+	Compact       bool `toml:"compact" json:"compact"`
+	Checksum      bool `toml:"checksum" json:"checksum"`
+	Analyze       bool `toml:"analyze" json:"analyze"`
 }
 
 type MydumperRuntime struct {
@@ -144,6 +145,7 @@ func NewConfig() *Config {
 		App: Lightning{
 			RegionConcurrency: runtime.NumCPU(),
 			TableConcurrency:  8,
+			IndexConcurrency:  2,
 			IOConcurrency:     5,
 			CheckRequirements: true,
 		},
@@ -228,12 +230,5 @@ func (cfg *Config) Load() error {
 			cfg.Checkpoint.DSN = "/tmp/" + cfg.Checkpoint.Schema + ".pb"
 		}
 	}
-
-	// If the level 1 compact configuration not found, default to true
-	if cfg.PostRestore.Level1Compact == nil {
-		cfg.PostRestore.Level1Compact = new(bool)
-		*cfg.PostRestore.Level1Compact = true
-	}
-
 	return nil
 }

lightning/kv/importer.go

@@ -155,7 +155,7 @@ func isIgnorableOpenCloseEngineError(err error) bool {
 	return err == nil || strings.Contains(err.Error(), "FileExists")
 }
 
-func makeTag(tableName string, engineID int) string {
+func makeTag(tableName string, engineID int32) string {
 	return fmt.Sprintf("%s:%d", tableName, engineID)
 }
 
@@ -166,7 +166,7 @@ var engineNamespace = uuid.Must(uuid.FromString("d68d6abe-c59e-45d6-ade8-e2b0ceb
 func (importer *Importer) OpenEngine(
 	ctx context.Context,
 	tableName string,
-	engineID int,
+	engineID int32,
 ) (*OpenedEngine, error) {
 	tag := makeTag(tableName, engineID)
 	engineUUID := uuid.NewV5(engineNamespace, tag)
@@ -312,7 +312,7 @@ func (engine *OpenedEngine) Close(ctx context.Context) (*ClosedEngine, error) {
 // (Open -> Write -> Close -> Import). This method should only be used when one
 // knows via other ways that the engine has already been opened, e.g. when
 // resuming from a checkpoint.
-func (importer *Importer) UnsafeCloseEngine(ctx context.Context, tableName string, engineID int) (*ClosedEngine, error) {
+func (importer *Importer) UnsafeCloseEngine(ctx context.Context, tableName string, engineID int32) (*ClosedEngine, error) {
 	tag := makeTag(tableName, engineID)
 	engineUUID := uuid.NewV5(engineNamespace, tag)
 	return importer.unsafeCloseEngine(ctx, tag, engineUUID)