add progress bar in rump mode

src/redis-shake/rump.go

@@ -16,6 +16,8 @@ import (
 	"redis-shake/filter"
 
 	"github.com/garyburd/redigo/redis"
+	"time"
+	"bytes"
 )
 
 type CmdRump struct {
@@ -193,6 +195,10 @@ type dbRumperExecutor struct {
 
 	fetcherWg sync.WaitGroup
 	stat      dbRumperExexutorStats
+
+	dbList    []int32 // db list
+	keyNumber int64   // key in this db number
+	close     bool    // is finish?
 }
 
 func NewDbRumperExecutor(rumperId, executorId int, sourceClient, targetClient, targetBigKeyClient redis.Conn,
@@ -273,6 +279,13 @@ func (dre *dbRumperExecutor) exec() {
 	dre.keyChan = make(chan *KeyNode, chanSize)
 	dre.resultChan = make(chan *KeyNode, chanSize)
 
+	// fetch db number from 'info keyspace'
+	var err error
+	dre.dbList, dre.keyNumber, err = dre.getSourceDbList()
+	if err != nil {
+		log.Panic(err)
+	}
+
 	/*
 	 * we start 4 routines to run:
 	 * 1. fetch keys from the source redis
@@ -286,7 +299,20 @@ func (dre *dbRumperExecutor) exec() {
 	go dre.writer()
 
 	// routine4
-	dre.receiver()
+	go dre.receiver()
+
+	// start metric
+	for range time.NewTicker(1 * time.Second).C {
+		if dre.close {
+			break
+		}
+
+		var b bytes.Buffer
+		fmt.Fprintf(&b, "dbRumper[%v] total = %v(keys) - %10v(keys) [%3d%%]  entry=%-12d",
+			dre.rumperId, dre.keyNumber, dre.stat.cCommands.Get(),
+			100 * dre.stat.cCommands.Get() / dre.keyNumber, dre.stat.wCommands.Get())
+		log.Info(b.String())
+	}
 
 	log.Infof("dbRumper[%v] executor[%v] finish!", dre.rumperId, dre.executorId)
 }
@@ -295,15 +321,9 @@ func (dre *dbRumperExecutor) fetcher() {
 	log.Infof("dbRumper[%v] executor[%v] start fetcher with special-cloud[%v]", dre.rumperId, dre.executorId,
 		conf.Options.ScanSpecialCloud)
 
-	// fetch db number from 'info keyspace'
+	log.Infof("dbRumper[%v] executor[%v] fetch db list: %v", dre.rumperId, dre.executorId, dre.dbList)
-	dbNumber, err := dre.getSourceDbList()
-	if err != nil {
-		log.Panic(err)
-	}
-
-	log.Infof("dbRumper[%v] executor[%v] fetch db list: %v", dre.rumperId, dre.executorId, dbNumber)
 	// iterate all db nodes
-	for _, db := range dbNumber {
+	for _, db := range dre.dbList {
 		if filter.FilterDB(int(db)) {
 			log.Infof("dbRumper[%v] executor[%v] db[%v] filtered", dre.rumperId, dre.executorId, db)
 			continue
@@ -423,34 +443,38 @@ func (dre *dbRumperExecutor) receiver() {
 	for ele := range dre.resultChan {
 		if _, err := dre.targetClient.Receive(); err != nil && err != redis.ErrNil {
 			rdbVersion, checksum, checkErr := utils.CheckVersionChecksum(utils.String2Bytes(ele.value))
-			log.Panicf("dbRumper[%v] executor[%v] restore key[%v] error[%v]: pttl[%v], value length[%v], " +
+			log.Panicf("dbRumper[%v] executor[%v] restore key[%v] error[%v]: pttl[%v], value length[%v], "+
 				"rdb version[%v], checksum[%v], check error[%v]",
 				dre.rumperId, dre.executorId, ele.key, err, strconv.FormatInt(ele.pttl, 10), len(ele.value),
 				rdbVersion, checksum, checkErr)
 		}
 		dre.stat.cCommands.Incr()
 	}
+
+	dre.close = true
 }
 
-func (dre *dbRumperExecutor) getSourceDbList() ([]int32, error) {
+func (dre *dbRumperExecutor) getSourceDbList() ([]int32, int64, error) {
 	// tencent cluster only has 1 logical db
 	if conf.Options.ScanSpecialCloud == utils.TencentCluster {
-		return []int32{0}, nil
+		return []int32{0}, 1, nil
 	}
 
 	conn := dre.sourceClient
 	if ret, err := conn.Do("info", "keyspace"); err != nil {
-		return nil, err
+		return nil, 0, err
 	} else if mp, err := utils.ParseKeyspace(ret.([]byte)); err != nil {
-		return nil, err
+		return nil, 0, err
 	} else {
 		list := make([]int32, 0, len(mp))
-		for key, val := range mp {
+		var total int64
-			if val > 0 {
+		for db, number := range mp {
-				list = append(list, key)
+			if number > 0 && !filter.FilterDB(int(db)) {
+				list = append(list, db)
+				total += number
 			}
 		}
-		return list, nil
+		return list, total, nil
 	}
 }
 
@@ -459,7 +483,7 @@ func (dre *dbRumperExecutor) doFetch(db int) error {
 	if db != dre.previousDb {
 		dre.previousDb = db
 		// send 'select' command to both source and target
-		log.Infof("dbRumper[%v] executor[%v] send source select db", dre.rumperId, dre.executorId)
+		log.Debugf("dbRumper[%v] executor[%v] send source select db", dre.rumperId, dre.executorId)
 		if _, err := dre.sourceClient.Do("select", db); err != nil {
 			return err
 		}
@@ -475,7 +499,7 @@ func (dre *dbRumperExecutor) doFetch(db int) error {
 			return err
 		}
 
-		log.Infof("dbRumper[%v] executor[%v] scanned keys number: %v", dre.rumperId, dre.executorId, len(keys))
+		log.Debugf("dbRumper[%v] executor[%v] scanned keys number: %v", dre.rumperId, dre.executorId, len(keys))
 
 		if len(keys) != 0 {
 			// pipeline dump