change server address from string to a type

weed/command/benchmark.go

@@ -3,6 +3,7 @@ package command
 import (
 	"bufio"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/pb"
 	"io"
 	"math"
 	"math/rand"
@@ -10,7 +11,6 @@ import (
 	"runtime"
 	"runtime/pprof"
 	"sort"
-	"strings"
 	"sync"
 	"time"
 
@@ -129,7 +129,7 @@ func runBenchmark(cmd *Command, args []string) bool {
 		defer pprof.StopCPUProfile()
 	}
 
-	b.masterClient = wdclient.NewMasterClient(b.grpcDialOption, "client", "", 0, "", strings.Split(*b.masters, ","))
+	b.masterClient = wdclient.NewMasterClient(b.grpcDialOption, "client", "", "", pb.ServerAddresses(*b.masters).ToAddresses())
 	go b.masterClient.KeepConnectedToMaster()
 	b.masterClient.WaitUntilConnected()