Merge branch 'master' of https://github.com/chrislusf/weed-fs

30 files changed, 322 insertions, 251 deletions

diff --git a/go/weed/benchmark.go b/go/weed/benchmark.go
index fec8472e5..f4f0b1874 100644
--- a/go/weed/benchmark.go
+++ b/go/weed/benchmark.go
@@ -2,9 +2,6 @@ package main
 
 import (
 	"bufio"
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/operation"
-	"github.com/chrislusf/weed-fs/go/util"
 	"fmt"
 	"io"
 	"math"
@@ -16,6 +13,10 @@ import (
 	"strings"
 	"sync"
 	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/util"
 )
 
 type BenchmarkOptions struct {
@@ -30,11 +31,14 @@ type BenchmarkOptions struct {
 	sequentialRead   *bool
 	collection       *string
 	cpuprofile       *string
+	maxCpu           *int
 	vid2server       map[string]string //cache for vid locations
+
 }
 
 var (
-	b BenchmarkOptions
+	b           BenchmarkOptions
+	sharedBytes []byte
 )
 
 func init() {
@@ -50,33 +54,35 @@ func init() {
 	b.read = cmdBenchmark.Flag.Bool("read", true, "enable read")
 	b.sequentialRead = cmdBenchmark.Flag.Bool("readSequentially", false, "randomly read by ids from \"-list\" specified file")
 	b.collection = cmdBenchmark.Flag.String("collection", "benchmark", "write data to this collection")
-	b.cpuprofile = cmdBenchmark.Flag.String("cpuprofile", "", "write cpu profile to file")
+	b.cpuprofile = cmdBenchmark.Flag.String("cpuprofile", "", "cpu profile output file")
+	b.maxCpu = cmdBenchmark.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs")
 	b.vid2server = make(map[string]string)
+	sharedBytes = make([]byte, 1024)
 }
 
 var cmdBenchmark = &Command{
 	UsageLine: "benchmark -server=localhost:9333 -c=10 -n=100000",
 	Short:     "benchmark on writing millions of files and read out",
 	Long: `benchmark on an empty weed file system.
-  
+
   Two tests during benchmark:
   1) write lots of small files to the system
   2) read the files out
-  
+
   The file content is mostly zero, but no compression is done.
-    
+
   You can choose to only benchmark read or write.
   During write, the list of uploaded file ids is stored in "-list" specified file.
   You can also use your own list of file ids to run read test.
-  
+
   Write speed and read speed will be collected.
   The numbers are used to get a sense of the system.
   Usually your network or the hard drive is the real bottleneck.
-  
+
   Another thing to watch is whether the volumes are evenly distributed
   to each volume server. Because the 7 more benchmark volumes are randomly distributed
   to servers with free slots, it's highly possible some servers have uneven amount of
-  benchmark volumes. To remedy this, you can use this to grow the benchmark volumes 
+  benchmark volumes. To remedy this, you can use this to grow the benchmark volumes
   before starting the benchmark command:
     http://localhost:9333/vol/grow?collection=benchmark&count=5
 
@@ -87,18 +93,17 @@ var cmdBenchmark = &Command{
 }
 
 var (
-	wait            sync.WaitGroup
-	writeStats      *stats
-	readStats       *stats
-	serverLimitChan map[string]chan bool
+	wait       sync.WaitGroup
+	writeStats *stats
+	readStats  *stats
 )
 
-func init() {
-	serverLimitChan = make(map[string]chan bool)
-}
-
 func runbenchmark(cmd *Command, args []string) bool {
 	fmt.Printf("This is Seaweed File System version %s %s %s\n", util.VERSION, runtime.GOOS, runtime.GOARCH)
+	if *b.maxCpu < 1 {
+		*b.maxCpu = runtime.NumCPU()
+	}
+	runtime.GOMAXPROCS(*b.maxCpu)
 	if *b.cpuprofile != "" {
 		f, err := os.Create(*b.cpuprofile)
 		if err != nil {
@@ -122,12 +127,12 @@ func runbenchmark(cmd *Command, args []string) bool {
 func bench_write() {
 	fileIdLineChan := make(chan string)
 	finishChan := make(chan bool)
-	writeStats = newStats()
+	writeStats = newStats(*b.concurrency)
 	idChan := make(chan int)
-	wait.Add(*b.concurrency)
 	go writeFileIds(*b.idListFile, fileIdLineChan, finishChan)
 	for i := 0; i < *b.concurrency; i++ {
-		go writeFiles(idChan, fileIdLineChan, writeStats)
+		wait.Add(1)
+		go writeFiles(idChan, fileIdLineChan, &writeStats.localStats[i])
 	}
 	writeStats.start = time.Now()
 	writeStats.total = *b.numberOfFiles
@@ -138,28 +143,30 @@ func bench_write() {
 	close(idChan)
 	wait.Wait()
 	writeStats.end = time.Now()
-	wait.Add(1)
+	wait.Add(2)
 	finishChan <- true
 	finishChan <- true
-	close(finishChan)
 	wait.Wait()
+	close(finishChan)
 	writeStats.printStats()
 }
 
 func bench_read() {
 	fileIdLineChan := make(chan string)
 	finishChan := make(chan bool)
-	readStats = newStats()
-	wait.Add(*b.concurrency)
+	readStats = newStats(*b.concurrency)
 	go readFileIds(*b.idListFile, fileIdLineChan)
 	readStats.start = time.Now()
 	readStats.total = *b.numberOfFiles
 	go readStats.checkProgress("Randomly Reading Benchmark", finishChan)
 	for i := 0; i < *b.concurrency; i++ {
-		go readFiles(fileIdLineChan, readStats)
+		wait.Add(1)
+		go readFiles(fileIdLineChan, &readStats.localStats[i])
 	}
 	wait.Wait()
+	wait.Add(1)
 	finishChan <- true
+	wait.Wait()
 	close(finishChan)
 	readStats.end = time.Now()
 	readStats.printStats()
@@ -170,126 +177,102 @@ type delayedFile struct {
 	fp        *operation.FilePart
 }
 
-func writeFiles(idChan chan int, fileIdLineChan chan string, s *stats) {
+func writeFiles(idChan chan int, fileIdLineChan chan string, s *stat) {
+	defer wait.Done()
 	delayedDeleteChan := make(chan *delayedFile, 100)
 	var waitForDeletions sync.WaitGroup
 	for i := 0; i < 7; i++ {
+		waitForDeletions.Add(1)
 		go func() {
-			waitForDeletions.Add(1)
+			defer waitForDeletions.Done()
 			for df := range delayedDeleteChan {
-				if df == nil {
-					break
-				}
 				if df.enterTime.After(time.Now()) {
 					time.Sleep(df.enterTime.Sub(time.Now()))
 				}
-				fp := df.fp
-				serverLimitChan[fp.Server] <- true
-				if e := util.Delete("http://" + fp.Server + "/" + fp.Fid); e == nil {
+				if e := util.Delete("http://" + df.fp.Server + "/" + df.fp.Fid); e == nil {
 					s.completed++
 				} else {
 					s.failed++
 				}
-				<-serverLimitChan[fp.Server]
 			}
-			waitForDeletions.Done()
 		}()
 	}
 
-	for {
-		if id, ok := <-idChan; ok {
-			start := time.Now()
-			fileSize := int64(*b.fileSize + rand.Intn(64))
-			fp := &operation.FilePart{Reader: &FakeReader{id: uint64(id), size: fileSize}, FileSize: fileSize}
-			if assignResult, err := operation.Assign(*b.server, 1, "", *b.collection, ""); err == nil {
-				fp.Server, fp.Fid, fp.Collection = assignResult.PublicUrl, assignResult.Fid, *b.collection
-				if _, ok := serverLimitChan[fp.Server]; !ok {
-					serverLimitChan[fp.Server] = make(chan bool, 7)
-				}
-				serverLimitChan[fp.Server] <- true
-				if _, err := fp.Upload(0, *b.server); err == nil {
-					if rand.Intn(100) < *b.deletePercentage {
-						s.total++
-						delayedDeleteChan <- &delayedFile{time.Now().Add(time.Second), fp}
-					} else {
-						fileIdLineChan <- fp.Fid
-					}
-					s.completed++
-					s.transferred += fileSize
+	for id := range idChan {
+		start := time.Now()
+		fileSize := int64(*b.fileSize + rand.Intn(64))
+		fp := &operation.FilePart{Reader: &FakeReader{id: uint64(id), size: fileSize}, FileSize: fileSize}
+		if assignResult, err := operation.Assign(*b.server, 1, "", *b.collection, ""); err == nil {
+			fp.Server, fp.Fid, fp.Collection = assignResult.PublicUrl, assignResult.Fid, *b.collection
+			if _, err := fp.Upload(0, *b.server); err == nil {
+				if rand.Intn(100) < *b.deletePercentage {
+					s.total++
+					delayedDeleteChan <- &delayedFile{time.Now().Add(time.Second), fp}
 				} else {
-					s.failed++
-				}
-				writeStats.addSample(time.Now().Sub(start))
-				<-serverLimitChan[fp.Server]
-				if *cmdBenchmark.IsDebug {
-					fmt.Printf("writing %d file %s\n", id, fp.Fid)
+					fileIdLineChan <- fp.Fid
 				}
+				s.completed++
+				s.transferred += fileSize
 			} else {
 				s.failed++
-				println("writing file error:", err.Error())
+				fmt.Printf("Failed to write with error:%v\n", err)
+			}
+			writeStats.addSample(time.Now().Sub(start))
+			if *cmdBenchmark.IsDebug {
+				fmt.Printf("writing %d file %s\n", id, fp.Fid)
 			}
 		} else {
-			break
+			s.failed++
+			println("writing file error:", err.Error())
 		}
 	}
 	close(delayedDeleteChan)
 	waitForDeletions.Wait()
-	wait.Done()
 }
 
-func readFiles(fileIdLineChan chan string, s *stats) {
-	serverLimitChan := make(map[string]chan bool)
+func readFiles(fileIdLineChan chan string, s *stat) {
+	defer wait.Done()
 	masterLimitChan := make(chan bool, 1)
-	for {
-		if fid, ok := <-fileIdLineChan; ok {
-			if len(fid) == 0 {
-				continue
-			}
-			if fid[0] == '#' {
-				continue
-			}
-			if *cmdBenchmark.IsDebug {
-				fmt.Printf("reading file %s\n", fid)
-			}
-			parts := strings.SplitN(fid, ",", 2)
-			vid := parts[0]
-			start := time.Now()
-			if server, ok := b.vid2server[vid]; !ok {
-				masterLimitChan <- true
-				if _, now_ok := b.vid2server[vid]; !now_ok {
-					if ret, err := operation.Lookup(*b.server, vid); err == nil {
-						if len(ret.Locations) > 0 {
-							server = ret.Locations[0].PublicUrl
-							b.vid2server[vid] = server
-						}
+	for fid := range fileIdLineChan {
+		if len(fid) == 0 {
+			continue
+		}
+		if fid[0] == '#' {
+			continue
+		}
+		if *cmdBenchmark.IsDebug {
+			fmt.Printf("reading file %s\n", fid)
+		}
+		parts := strings.SplitN(fid, ",", 2)
+		vid := parts[0]
+		start := time.Now()
+		if server, ok := b.vid2server[vid]; !ok {
+			masterLimitChan <- true
+			if _, now_ok := b.vid2server[vid]; !now_ok {
+				if ret, err := operation.Lookup(*b.server, vid); err == nil {
+					if len(ret.Locations) > 0 {
+						server = ret.Locations[0].PublicUrl
+						b.vid2server[vid] = server
 					}
 				}
-				<-masterLimitChan
 			}
-			if server, ok := b.vid2server[vid]; ok {
-				if _, ok := serverLimitChan[server]; !ok {
-					serverLimitChan[server] = make(chan bool, 7)
-				}
-				serverLimitChan[server] <- true
-				url := "http://" + server + "/" + fid
-				if bytesRead, err := util.Get(url); err == nil {
-					s.completed++
-					s.transferred += int64(len(bytesRead))
-					readStats.addSample(time.Now().Sub(start))
-				} else {
-					s.failed++
-					println("!!!! Failed to read from ", url, " !!!!!")
-				}
-				<-serverLimitChan[server]
+			<-masterLimitChan
+		}
+		if server, ok := b.vid2server[vid]; ok {
+			url := "http://" + server + "/" + fid
+			if bytesRead, err := util.Get(url); err == nil {
+				s.completed++
+				s.transferred += int64(len(bytesRead))
+				readStats.addSample(time.Now().Sub(start))
 			} else {
 				s.failed++
-				println("!!!! volume id ", vid, " location not found!!!!!")
+				fmt.Printf("Failed to read %s error:%v\n", url, err)
 			}
 		} else {
-			break
+			s.failed++
+			println("!!!! volume id ", vid, " location not found!!!!!")
 		}
 	}
-	wait.Done()
 }
 
 func writeFileIds(fileName string, fileIdLineChan chan string, finishChan chan bool) {
@@ -353,20 +336,28 @@ const (
 
 // An efficient statics collecting and rendering
 type stats struct {
-	data        []int
-	overflow    []int
+	data       []int
+	overflow   []int
+	localStats []stat
+	start      time.Time
+	end        time.Time
+	total      int
+}
+type stat struct {
 	completed   int
 	failed      int
 	total       int
 	transferred int64
-	start       time.Time
-	end         time.Time
 }
 
 var percentages = []int{50, 66, 75, 80, 90, 95, 98, 99, 100}
 
-func newStats() *stats {
-	return &stats{data: make([]int, benchResolution), overflow: make([]int, 0)}
+func newStats(n int) *stats {
+	return &stats{
+		data:       make([]int, benchResolution),
+		overflow:   make([]int, 0),
+		localStats: make([]stat, n),
+	}
 }
 
 func (s *stats) addSample(d time.Duration) {
@@ -387,28 +378,41 @@ func (s *stats) checkProgress(testName string, finishChan chan bool) {
 	for {
 		select {
 		case <-finishChan:
+			wait.Done()
 			return
 		case t := <-ticker:
-			completed, transferred, taken := s.completed-lastCompleted, s.transferred-lastTransferred, t.Sub(lastTime)
+			completed, transferred, taken, total := 0, int64(0), t.Sub(lastTime), s.total
+			for _, localStat := range s.localStats {
+				completed += localStat.completed
+				transferred += localStat.transferred
+				total += localStat.total
+			}
 			fmt.Printf("Completed %d of %d requests, %3.1f%% %3.1f/s %3.1fMB/s\n",
-				s.completed, s.total, float64(s.completed)*100/float64(s.total),
-				float64(completed)*float64(int64(time.Second))/float64(int64(taken)),
-				float64(transferred)*float64(int64(time.Second))/float64(int64(taken))/float64(1024*1024),
+				completed, total, float64(completed)*100/float64(total),
+				float64(completed-lastCompleted)*float64(int64(time.Second))/float64(int64(taken)),
+				float64(transferred-lastTransferred)*float64(int64(time.Second))/float64(int64(taken))/float64(1024*1024),
 			)
-			lastCompleted, lastTransferred, lastTime = s.completed, s.transferred, t
+			lastCompleted, lastTransferred, lastTime = completed, transferred, t
 		}
 	}
 }
 
 func (s *stats) printStats() {
+	completed, failed, transferred, total := 0, 0, int64(0), s.total
+	for _, localStat := range s.localStats {
+		completed += localStat.completed
+		failed += localStat.failed
+		transferred += localStat.transferred
+		total += localStat.total
+	}
 	timeTaken := float64(int64(s.end.Sub(s.start))) / 1000000000
 	fmt.Printf("\nConcurrency Level:      %d\n", *b.concurrency)
 	fmt.Printf("Time taken for tests:   %.3f seconds\n", timeTaken)
-	fmt.Printf("Complete requests:      %d\n", s.completed)
-	fmt.Printf("Failed requests:        %d\n", s.failed)
-	fmt.Printf("Total transferred:      %d bytes\n", s.transferred)
-	fmt.Printf("Requests per second:    %.2f [#/sec]\n", float64(s.completed)/timeTaken)
-	fmt.Printf("Transfer rate:          %.2f [Kbytes/sec]\n", float64(s.transferred)/1024/timeTaken)
+	fmt.Printf("Complete requests:      %d\n", completed)
+	fmt.Printf("Failed requests:        %d\n", failed)
+	fmt.Printf("Total transferred:      %d bytes\n", transferred)
+	fmt.Printf("Requests per second:    %.2f [#/sec]\n", float64(completed)/timeTaken)
+	fmt.Printf("Transfer rate:          %.2f [Kbytes/sec]\n", float64(transferred)/1024/timeTaken)
 	n, sum := 0, 0
 	min, max := 10000000, 0
 	for i := 0; i < len(s.data); i++ {
@@ -496,15 +500,32 @@ func (l *FakeReader) Read(p []byte) (n int, err error) {
 	} else {
 		n = len(p)
 	}
-	for i := 0; i < n-8; i += 8 {
-		for s := uint(0); s < 8; s++ {
-			p[i] = byte(l.id >> (s * 8))
+	if n >= 8 {
+		for i := 0; i < 8; i++ {
+			p[i] = byte(l.id >> uint(i*8))
 		}
 	}
 	l.size -= int64(n)
 	return
 }
 
+func (l *FakeReader) WriteTo(w io.Writer) (n int64, err error) {
+	size := int(l.size)
+	bufferSize := len(sharedBytes)
+	for size > 0 {
+		tempBuffer := sharedBytes
+		if size < bufferSize {
+			tempBuffer = sharedBytes[0:size]
+		}
+		count, e := w.Write(tempBuffer)
+		if e != nil {
+			return int64(size), e
+		}
+		size -= count
+	}
+	return l.size, nil
+}
+
 func Readln(r *bufio.Reader) ([]byte, error) {
 	var (
 		isPrefix bool  = true
diff --git a/go/weed/compact.go b/go/weed/compact.go
index a99e6c93e..71c4ea90f 100644
--- a/go/weed/compact.go
+++ b/go/weed/compact.go
@@ -12,7 +12,7 @@ func init() {
 
 var cmdCompact = &Command{
 	UsageLine: "compact -dir=/tmp -volumeId=234",
-	Short:     "run weed tool compact on volume file if corrupted",
+	Short:     "run weed tool compact on volume file",
 	Long: `Force an compaction to remove deleted files from volume files.
   The compacted .dat file is stored as .cpd file.
   The compacted .idx file is stored as .cpx file.
diff --git a/go/weed/download.go b/go/weed/download.go
index c30d17915..c782654f5 100644
--- a/go/weed/download.go
+++ b/go/weed/download.go
@@ -1,14 +1,15 @@
 package main
 
 import (
-	"github.com/chrislusf/weed-fs/go/operation"
-	"github.com/chrislusf/weed-fs/go/util"
 	"fmt"
 	"io"
 	"io/ioutil"
 	"os"
 	"path"
 	"strings"
+
+	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/util"
 )
 
 var (
diff --git a/go/weed/export.go b/go/weed/export.go
index 81bc21f6e..c9cc0e3fe 100644
--- a/go/weed/export.go
+++ b/go/weed/export.go
@@ -3,8 +3,6 @@ package main
 import (
 	"archive/tar"
 	"bytes"
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/storage"
 	"fmt"
 	"os"
 	"path"
@@ -12,6 +10,9 @@ import (
 	"strings"
 	"text/template"
 	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/storage"
 )
 
 func init() {
@@ -36,7 +37,7 @@ var cmdExport = &Command{
 var (
 	exportVolumePath = cmdExport.Flag.String("dir", "/tmp", "input data directory to store volume data files")
 	exportCollection = cmdExport.Flag.String("collection", "", "the volume collection name")
-	exportVolumeId   = cmdExport.Flag.Int("volumeId", -1, "a volume id. The volume should already exist in the dir. The volume index file should not exist.")
+	exportVolumeId   = cmdExport.Flag.Int("volumeId", -1, "a volume id. The volume .dat and .idx files should already exist in the dir.")
 	dest             = cmdExport.Flag.String("o", "", "output tar file name, must ends with .tar, or just a \"-\" for stdout")
 	format           = cmdExport.Flag.String("fileNameFormat", defaultFnFormat, "filename format, default to {{.Mime}}/{{.Id}}:{{.Name}}")
 	tarFh            *tar.Writer
diff --git a/go/weed/filer.go b/go/weed/filer.go
index 7dbecb4d0..5ae3a3496 100644
--- a/go/weed/filer.go
+++ b/go/weed/filer.go
@@ -1,13 +1,14 @@
 package main
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/util"
-	"github.com/chrislusf/weed-fs/go/weed/weed_server"
 	"net/http"
 	"os"
 	"strconv"
 	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/util"
+	"github.com/chrislusf/weed-fs/go/weed/weed_server"
 )
 
 var (
@@ -20,6 +21,7 @@ type FilerOptions struct {
 	collection              *string
 	defaultReplicaPlacement *string
 	dir                     *string
+	redirectOnRead          *bool
 }
 
 func init() {
@@ -28,7 +30,8 @@ func init() {
 	f.collection = cmdFiler.Flag.String("collection", "", "all data will be stored in this collection")
 	f.port = cmdFiler.Flag.Int("port", 8888, "filer server http listen port")
 	f.dir = cmdFiler.Flag.String("dir", os.TempDir(), "directory to store meta data")
-	f.defaultReplicaPlacement = cmdFiler.Flag.String("defaultReplicaPlacement", "000", "Default replication type if not specified.")
+	f.defaultReplicaPlacement = cmdFiler.Flag.String("defaultReplicaPlacement", "000", "default replication type if not specified")
+	f.redirectOnRead = cmdFiler.Flag.Bool("redirectOnRead", false, "whether proxy or redirect to volume server during file GET request")
 }
 
 var cmdFiler = &Command{
@@ -59,7 +62,9 @@ func runFiler(cmd *Command, args []string) bool {
 	}
 
 	r := http.NewServeMux()
-	_, nfs_err := weed_server.NewFilerServer(r, *f.port, *f.master, *f.dir, *f.collection)
+	_, nfs_err := weed_server.NewFilerServer(r, *f.port, *f.master, *f.dir, *f.collection,
+		*f.defaultReplicaPlacement, *f.redirectOnRead,
+	)
 	if nfs_err != nil {
 		glog.Fatalf(nfs_err.Error())
 	}
diff --git a/go/weed/fix.go b/go/weed/fix.go
index ad573875a..e66075ed2 100644
--- a/go/weed/fix.go
+++ b/go/weed/fix.go
@@ -1,11 +1,12 @@
 package main
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/storage"
 	"os"
 	"path"
 	"strconv"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/storage"
 )
 
 func init() {
@@ -16,7 +17,7 @@ func init() {
 var cmdFix = &Command{
 	UsageLine: "fix -dir=/tmp -volumeId=234",
 	Short:     "run weed tool fix on index file if corrupted",
-	Long: `Fix runs the WeedFS fix command to re-create the index .idx file.
+	Long: `Fix runs the SeeweedFS fix command to re-create the index .idx file.
 
   `,
 }
diff --git a/go/weed/master.go b/go/weed/master.go
index 6617c8ca6..f88964b6d 100644
--- a/go/weed/master.go
+++ b/go/weed/master.go
@@ -1,16 +1,17 @@
 package main
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/util"
-	"github.com/chrislusf/weed-fs/go/weed/weed_server"
-	"github.com/gorilla/mux"
 	"net/http"
 	"os"
 	"runtime"
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/util"
+	"github.com/chrislusf/weed-fs/go/weed/weed_server"
+	"github.com/gorilla/mux"
 )
 
 func init() {
@@ -29,6 +30,7 @@ var cmdMaster = &Command{
 var (
 	mport                   = cmdMaster.Flag.Int("port", 9333, "http listen port")
 	masterIp                = cmdMaster.Flag.String("ip", "", "master listening ip address, default to listen on all network interfaces")
+	masterBindIp            = cmdMaster.Flag.String("ip.bind", "0.0.0.0", "ip address to bind to")
 	mPublicIp               = cmdMaster.Flag.String("publicIp", "", "peer accessible <ip>|<server_name>")
 	metaFolder              = cmdMaster.Flag.String("mdir", os.TempDir(), "data directory to store meta data")
 	masterPeers             = cmdMaster.Flag.String("peers", "", "other master nodes in comma separated ip:port list")
@@ -61,7 +63,7 @@ func runMaster(cmd *Command, args []string) bool {
 		*volumeSizeLimitMB, *mpulse, *confFile, *defaultReplicaPlacement, *garbageThreshold, masterWhiteList,
 	)
 
-	listeningAddress := *masterIp + ":" + strconv.Itoa(*mport)
+	listeningAddress := *masterBindIp + ":" + strconv.Itoa(*mport)
 
 	glog.V(0).Infoln("Start Seaweed Master", util.VERSION, "at", listeningAddress)
 
diff --git a/go/weed/mount.go b/go/weed/mount.go
index 0290e0f53..66e645387 100644
--- a/go/weed/mount.go
+++ b/go/weed/mount.go
@@ -1,7 +1,5 @@
 package main
 
-import ()
-
 type MountOptions struct {
 	filer *string
 	dir   *string
diff --git a/go/weed/mount_std.go b/go/weed/mount_std.go
index e5fc0986c..808c6c563 100644
--- a/go/weed/mount_std.go
+++ b/go/weed/mount_std.go
@@ -3,15 +3,16 @@
 package main
 
 import (
+	"fmt"
+	"os"
+	"runtime"
+
 	"bazil.org/fuse"
 	"bazil.org/fuse/fs"
 	"github.com/chrislusf/weed-fs/go/filer"
 	"github.com/chrislusf/weed-fs/go/glog"
 	"github.com/chrislusf/weed-fs/go/storage"
 	"github.com/chrislusf/weed-fs/go/util"
-	"fmt"
-	"os"
-	"runtime"
 )
 
 func runMount(cmd *Command, args []string) bool {
diff --git a/go/weed/server.go b/go/weed/server.go
index 1d854d641..22222d699 100644
--- a/go/weed/server.go
+++ b/go/weed/server.go
@@ -1,10 +1,6 @@
 package main
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/util"
-	"github.com/chrislusf/weed-fs/go/weed/weed_server"
-	"github.com/gorilla/mux"
 	"net/http"
 	"os"
 	"runtime"
@@ -13,6 +9,11 @@ import (
 	"strings"
 	"sync"
 	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/util"
+	"github.com/chrislusf/weed-fs/go/weed/weed_server"
+	"github.com/gorilla/mux"
 )
 
 type ServerOptions struct {
@@ -31,17 +32,17 @@ func init() {
 var cmdServer = &Command{
 	UsageLine: "server -port=8080 -dir=/tmp -volume.max=5 -ip=server_name",
 	Short:     "start a server, including volume server, and automatically elect a master server",
-	Long: `start both a volume server to provide storage spaces 
+	Long: `start both a volume server to provide storage spaces
   and a master server to provide volume=>location mapping service and sequence number of file ids
-  
+
   This is provided as a convenient way to start both volume server and master server.
   The servers are exactly the same as starting them separately.
 
   So other volume servers can use this embedded master server also.
-  
+
   Optionally, one filer server can be started. Logically, filer servers should not be in a cluster.
   They run with meta data on disk, not shared. So each filer server is different.
-  
+
   `,
 }
 
@@ -72,12 +73,14 @@ var (
 )
 
 func init() {
-	serverOptions.cpuprofile = cmdServer.Flag.String("cpuprofile", "", "write cpu profile to file")
+	serverOptions.cpuprofile = cmdServer.Flag.String("cpuprofile", "", "cpu profile output file")
 	filerOptions.master = cmdServer.Flag.String("filer.master", "", "default to current master server")
 	filerOptions.collection = cmdServer.Flag.String("filer.collection", "", "all data will be stored in this collection")
 	filerOptions.port = cmdServer.Flag.Int("filer.port", 8888, "filer server http listen port")
 	filerOptions.dir = cmdServer.Flag.String("filer.dir", "", "directory to store meta data, default to a 'filer' sub directory of what -mdir is specified")
 	filerOptions.defaultReplicaPlacement = cmdServer.Flag.String("filer.defaultReplicaPlacement", "", "Default replication type if not specified during runtime.")
+	filerOptions.redirectOnRead = cmdServer.Flag.Bool("filer.redirectOnRead", false, "whether proxy or redirect to volume server during file GET request")
+
 }
 
 func runServer(cmd *Command, args []string) bool {
@@ -149,7 +152,9 @@ func runServer(cmd *Command, args []string) bool {
 	if *isStartingFiler {
 		go func() {
 			r := http.NewServeMux()
-			_, nfs_err := weed_server.NewFilerServer(r, *filerOptions.port, *filerOptions.master, *filerOptions.dir, *filerOptions.collection)
+			_, nfs_err := weed_server.NewFilerServer(r, *filerOptions.port, *filerOptions.master, *filerOptions.dir, *filerOptions.collection,
+				*filerOptions.defaultReplicaPlacement, *filerOptions.redirectOnRead,
+			)
 			if nfs_err != nil {
 				glog.Fatalf(nfs_err.Error())
 			}
diff --git a/go/weed/shell.go b/go/weed/shell.go
index c8043e0dd..f2c4990ea 100644
--- a/go/weed/shell.go
+++ b/go/weed/shell.go
@@ -2,9 +2,10 @@ package main
 
 import (
 	"bufio"
-	"github.com/chrislusf/weed-fs/go/glog"
 	"fmt"
 	"os"
+
+	"github.com/chrislusf/weed-fs/go/glog"
 )
 
 func init() {
diff --git a/go/weed/signal_handling_notsupported.go b/go/weed/signal_handling_notsupported.go
index ad4f37b0c..343cf7de2 100644
--- a/go/weed/signal_handling_notsupported.go
+++ b/go/weed/signal_handling_notsupported.go
@@ -2,7 +2,5 @@
 
 package main
 
-import ()
-
 func OnInterrupt(fn func()) {
 }
diff --git a/go/weed/upload.go b/go/weed/upload.go
index 4eae4d274..2d67c0bd9 100644
--- a/go/weed/upload.go
+++ b/go/weed/upload.go
@@ -1,11 +1,12 @@
 package main
 
 import (
-	"github.com/chrislusf/weed-fs/go/operation"
 	"encoding/json"
 	"fmt"
 	"os"
 	"path/filepath"
+
+	"github.com/chrislusf/weed-fs/go/operation"
 )
 
 var (
diff --git a/go/weed/version.go b/go/weed/version.go
index 63441509e..8d3a6fed7 100644
--- a/go/weed/version.go
+++ b/go/weed/version.go
@@ -1,9 +1,10 @@
 package main
 
 import (
-	"github.com/chrislusf/weed-fs/go/util"
 	"fmt"
 	"runtime"
+
+	"github.com/chrislusf/weed-fs/go/util"
 )
 
 var cmdVersion = &Command{
diff --git a/go/weed/volume.go b/go/weed/volume.go
index 17d03f0c5..212cb4b33 100644
--- a/go/weed/volume.go
+++ b/go/weed/volume.go
@@ -1,15 +1,16 @@
 package main
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/util"
-	"github.com/chrislusf/weed-fs/go/weed/weed_server"
 	"net/http"
 	"os"
 	"runtime"
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/util"
+	"github.com/chrislusf/weed-fs/go/weed/weed_server"
 )
 
 func init() {
@@ -30,7 +31,7 @@ var (
 	maxVolumeCounts       = cmdVolume.Flag.String("max", "7", "maximum numbers of volumes, count[,count]...")
 	ip                    = cmdVolume.Flag.String("ip", "", "ip or server name")
 	publicIp              = cmdVolume.Flag.String("publicIp", "", "Publicly accessible <ip|server_name>")
-	bindIp                = cmdVolume.Flag.String("ip.bind", "0.0.0.0", "ip address to bind to")
+	volumeBindIp          = cmdVolume.Flag.String("ip.bind", "0.0.0.0", "ip address to bind to")
 	masterNode            = cmdVolume.Flag.String("mserver", "localhost:9333", "master server location")
 	vpulse                = cmdVolume.Flag.Int("pulseSeconds", 5, "number of seconds between heartbeats, must be smaller than or equal to the master's setting")
 	vTimeout              = cmdVolume.Flag.Int("idleTimeout", 10, "connection idle seconds")
@@ -85,7 +86,7 @@ func runVolume(cmd *Command, args []string) bool {
 		*fixJpgOrientation,
 	)
 
-	listeningAddress := *bindIp + ":" + strconv.Itoa(*vport)
+	listeningAddress := *volumeBindIp + ":" + strconv.Itoa(*vport)
 
 	glog.V(0).Infoln("Start Seaweed volume server", util.VERSION, "at", listeningAddress)
 
diff --git a/go/weed/volume_test.go b/go/weed/volume_test.go
index 764362a2b..ef00a8c7c 100644
--- a/go/weed/volume_test.go
+++ b/go/weed/volume_test.go
@@ -1,10 +1,11 @@
 package main
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
 	"net/http"
 	"testing"
 	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
 )
 
 func TestXYZ(t *testing.T) {
diff --git a/go/weed/weed.go b/go/weed/weed.go
index c1f5a72de..c304b7f35 100644
--- a/go/weed/weed.go
+++ b/go/weed/weed.go
@@ -1,7 +1,6 @@
 package main
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
 	"flag"
 	"fmt"
 	"io"
@@ -13,6 +12,8 @@ import (
 	"time"
 	"unicode"
 	"unicode/utf8"
+
+	"github.com/chrislusf/weed-fs/go/glog"
 )
 
 var IsDebug *bool
diff --git a/go/weed/weed_server/common.go b/go/weed/weed_server/common.go
index 816107dc5..39b0830e3 100644
--- a/go/weed/weed_server/common.go
+++ b/go/weed/weed_server/common.go
@@ -2,11 +2,6 @@ package weed_server
 
 import (
 	"bytes"
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/operation"
-	"github.com/chrislusf/weed-fs/go/stats"
-	"github.com/chrislusf/weed-fs/go/storage"
-	"github.com/chrislusf/weed-fs/go/util"
 	"encoding/json"
 	"fmt"
 	"net"
@@ -14,6 +9,12 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/stats"
+	"github.com/chrislusf/weed-fs/go/storage"
+	"github.com/chrislusf/weed-fs/go/util"
 )
 
 var serverStats *stats.ServerStats
diff --git a/go/weed/weed_server/filer_server.go b/go/weed/weed_server/filer_server.go
index 5ff0ed986..0bda58d06 100644
--- a/go/weed/weed_server/filer_server.go
+++ b/go/weed/weed_server/filer_server.go
@@ -1,24 +1,31 @@
 package weed_server
 
 import (
-	"github.com/chrislusf/weed-fs/go/filer"
-	"github.com/chrislusf/weed-fs/go/glog"
 	"net/http"
 	"strconv"
+
+	"github.com/chrislusf/weed-fs/go/filer"
+	"github.com/chrislusf/weed-fs/go/glog"
 )
 
 type FilerServer struct {
-	port       string
-	master     string
-	collection string
-	filer      filer.Filer
+	port               string
+	master             string
+	collection         string
+	defaultReplication string
+	redirectOnRead     bool
+	filer              filer.Filer
 }
 
-func NewFilerServer(r *http.ServeMux, port int, master string, dir string, collection string) (fs *FilerServer, err error) {
+func NewFilerServer(r *http.ServeMux, port int, master string, dir string, collection string,
+	replication string, redirectOnRead bool,
+) (fs *FilerServer, err error) {
 	fs = &FilerServer{
-		master:     master,
-		collection: collection,
-		port:       ":" + strconv.Itoa(port),
+		master:             master,
+		collection:         collection,
+		defaultReplication: replication,
+		redirectOnRead:     redirectOnRead,
+		port:               ":" + strconv.Itoa(port),
 	}
 
 	if fs.filer, err = filer.NewFilerEmbedded(master, dir); err != nil {
diff --git a/go/weed/weed_server/filer_server_handlers.go b/go/weed/weed_server/filer_server_handlers.go
index e36e7c310..6f22912a7 100644
--- a/go/weed/weed_server/filer_server_handlers.go
+++ b/go/weed/weed_server/filer_server_handlers.go
@@ -1,12 +1,8 @@
 package weed_server
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/operation"
-	"github.com/chrislusf/weed-fs/go/util"
 	"encoding/json"
 	"errors"
-	"github.com/syndtr/goleveldb/leveldb"
 	"io"
 	"io/ioutil"
 	"math/rand"
@@ -14,6 +10,11 @@ import (
 	"net/url"
 	"strconv"
 	"strings"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/util"
+	"github.com/syndtr/goleveldb/leveldb"
 )
 
 func (fs *FilerServer) filerHandler(w http.ResponseWriter, r *http.Request) {
@@ -80,7 +81,12 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 		return
 	}
 	urlLocation := lookup.Locations[rand.Intn(len(lookup.Locations))].PublicUrl
-	u, _ := url.Parse("http://" + urlLocation + "/" + fileId)
+	urlString := "http://" + urlLocation + "/" + fileId
+	if fs.redirectOnRead {
+		http.Redirect(w, r, urlString, http.StatusFound)
+		return
+	}
+	u, _ := url.Parse(urlString)
 	request := &http.Request{
 		Method:        r.Method,
 		URL:           u,
@@ -109,7 +115,11 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 
 func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 	query := r.URL.Query()
-	assignResult, ae := operation.Assign(fs.master, 1, query.Get("replication"), fs.collection, query.Get("ttl"))
+	replication := query.Get("replication")
+	if replication == "" {
+		replication = fs.defaultReplication
+	}
+	assignResult, ae := operation.Assign(fs.master, 1, replication, fs.collection, query.Get("ttl"))
 	if ae != nil {
 		glog.V(0).Infoln("failing to assign a file id", ae.Error())
 		writeJsonError(w, r, ae)
diff --git a/go/weed/weed_server/filer_server_handlers_admin.go b/go/weed/weed_server/filer_server_handlers_admin.go
index ff52dff24..5ba12e0b8 100644
--- a/go/weed/weed_server/filer_server_handlers_admin.go
+++ b/go/weed/weed_server/filer_server_handlers_admin.go
@@ -1,8 +1,9 @@
 package weed_server
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
 	"net/http"
+
+	"github.com/chrislusf/weed-fs/go/glog"
 )
 
 /*
diff --git a/go/weed/weed_server/master_server.go b/go/weed/weed_server/master_server.go
index 401f6cfdb..d000cb610 100644
--- a/go/weed/weed_server/master_server.go
+++ b/go/weed/weed_server/master_server.go
@@ -1,16 +1,17 @@
 package weed_server
 
 import (
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"sync"
+
 	"github.com/chrislusf/weed-fs/go/glog"
 	"github.com/chrislusf/weed-fs/go/sequence"
 	"github.com/chrislusf/weed-fs/go/topology"
 	"github.com/chrislusf/weed-fs/go/util"
 	"github.com/goraft/raft"
 	"github.com/gorilla/mux"
-	"net/http"
-	"net/http/httputil"
-	"net/url"
-	"sync"
 )
 
 type MasterServer struct {
diff --git a/go/weed/weed_server/master_server_handlers.go b/go/weed/weed_server/master_server_handlers.go
index 93e9e7d9a..7a7a3b70d 100644
--- a/go/weed/weed_server/master_server_handlers.go
+++ b/go/weed/weed_server/master_server_handlers.go
@@ -1,12 +1,13 @@
 package weed_server
 
 import (
-	"github.com/chrislusf/weed-fs/go/operation"
-	"github.com/chrislusf/weed-fs/go/stats"
-	"github.com/chrislusf/weed-fs/go/storage"
 	"net/http"
 	"strconv"
 	"strings"
+
+	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/stats"
+	"github.com/chrislusf/weed-fs/go/storage"
 )
 
 func (ms *MasterServer) lookupVolumeId(vids []string, collection string) (volumeLocations map[string]operation.LookupResult) {
@@ -78,7 +79,7 @@ func (ms *MasterServer) dirAssignHandler(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	if !ms.Topo.HasWriableVolume(option) {
+	if !ms.Topo.HasWritableVolume(option) {
 		if ms.Topo.FreeSpace() <= 0 {
 			w.WriteHeader(http.StatusNotFound)
 			writeJsonQuiet(w, r, operation.AssignResult{Error: "No free volumes left!"})
@@ -86,7 +87,7 @@ func (ms *MasterServer) dirAssignHandler(w http.ResponseWriter, r *http.Request)
 		} else {
 			ms.vgLock.Lock()
 			defer ms.vgLock.Unlock()
-			if !ms.Topo.HasWriableVolume(option) {
+			if !ms.Topo.HasWritableVolume(option) {
 				if _, err = ms.vg.AutomaticGrowByType(option, ms.Topo); err != nil {
 					writeJsonQuiet(w, r, operation.AssignResult{Error: "Cannot grow volume group! " + err.Error()})
 					return
diff --git a/go/weed/weed_server/master_server_handlers_admin.go b/go/weed/weed_server/master_server_handlers_admin.go
index c9a8020c2..d7124e567 100644
--- a/go/weed/weed_server/master_server_handlers_admin.go
+++ b/go/weed/weed_server/master_server_handlers_admin.go
@@ -1,18 +1,19 @@
 package weed_server
 
 import (
-	proto "code.google.com/p/goprotobuf/proto"
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/operation"
-	"github.com/chrislusf/weed-fs/go/storage"
-	"github.com/chrislusf/weed-fs/go/topology"
-	"github.com/chrislusf/weed-fs/go/util"
 	"encoding/json"
 	"errors"
 	"io/ioutil"
 	"net/http"
 	"strconv"
 	"strings"
+
+	proto "code.google.com/p/goprotobuf/proto"
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/storage"
+	"github.com/chrislusf/weed-fs/go/topology"
+	"github.com/chrislusf/weed-fs/go/util"
 )
 
 func (ms *MasterServer) collectionDeleteHandler(w http.ResponseWriter, r *http.Request) {
@@ -143,7 +144,7 @@ func (ms *MasterServer) deleteFromMasterServerHandler(w http.ResponseWriter, r *
 	}
 }
 
-func (ms *MasterServer) hasWriableVolume(option *topology.VolumeGrowOption) bool {
+func (ms *MasterServer) HasWritableVolume(option *topology.VolumeGrowOption) bool {
 	vl := ms.Topo.GetVolumeLayout(option.Collection, option.ReplicaPlacement, option.Ttl)
 	return vl.GetActiveVolumeCount(option) > 0
 }
diff --git a/go/weed/weed_server/raft_server.go b/go/weed/weed_server/raft_server.go
index 9a21249a9..b9aaef2b0 100644
--- a/go/weed/weed_server/raft_server.go
+++ b/go/weed/weed_server/raft_server.go
@@ -2,19 +2,22 @@ package weed_server
 
 import (
 	"bytes"
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/topology"
 	"encoding/json"
 	"errors"
 	"fmt"
-	"github.com/goraft/raft"
-	"github.com/gorilla/mux"
 	"io/ioutil"
 	"math/rand"
 	"net/http"
 	"net/url"
+	"os"
+	"path"
 	"strings"
 	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/topology"
+	"github.com/goraft/raft"
+	"github.com/gorilla/mux"
 )
 
 type RaftServer struct {
@@ -46,6 +49,13 @@ func NewRaftServer(r *mux.Router, peers []string, httpAddr string, dataDir strin
 	transporter.Transport.MaxIdleConnsPerHost = 1024
 	glog.V(1).Infof("Starting RaftServer with IP:%v:", httpAddr)
 
+	// Clear old cluster configurations if peers are set
+	if len(s.peers) > 0 {
+		os.RemoveAll(path.Join(s.dataDir, "conf"))
+		os.RemoveAll(path.Join(s.dataDir, "log"))
+		os.RemoveAll(path.Join(s.dataDir, "snapshot"))
+	}
+
 	s.raftServer, err = raft.NewServer(s.httpAddr, s.dataDir, transporter, nil, topo, "")
 	if err != nil {
 		glog.V(0).Infoln(err)
@@ -53,35 +63,30 @@ func NewRaftServer(r *mux.Router, peers []string, httpAddr string, dataDir strin
 	}
 	transporter.Install(s.raftServer, s)
 	s.raftServer.SetHeartbeatInterval(1 * time.Second)
-	s.raftServer.SetElectionTimeout(time.Duration(pulseSeconds) * 1150 * time.Millisecond)
+	s.raftServer.SetElectionTimeout(time.Duration(pulseSeconds) * 3450 * time.Millisecond)
 	s.raftServer.Start()
 
 	s.router.HandleFunc("/cluster/join", s.joinHandler).Methods("POST")
 	s.router.HandleFunc("/cluster/status", s.statusHandler).Methods("GET")
 
-	// Join to leader if specified.
 	if len(s.peers) > 0 {
-		if !s.raftServer.IsLogEmpty() {
-			glog.V(0).Infoln("Starting cluster with existing logs.")
-		} else {
-			glog.V(0).Infoln("Joining cluster:", strings.Join(s.peers, ","))
-			time.Sleep(time.Duration(rand.Intn(1000)) * time.Millisecond)
-			firstJoinError := s.Join(s.peers)
-			if firstJoinError != nil {
-				glog.V(0).Infoln("No existing server found. Starting as leader in the new cluster.")
-				_, err := s.raftServer.Do(&raft.DefaultJoinCommand{
-					Name:             s.raftServer.Name(),
-					ConnectionString: "http://" + s.httpAddr,
-				})
-				if err != nil {
-					glog.V(0).Infoln(err)
-					return nil
-				}
+		// Join to leader if specified.
+		glog.V(0).Infoln("Joining cluster:", strings.Join(s.peers, ","))
+		time.Sleep(time.Duration(rand.Intn(1000)) * time.Millisecond)
+		firstJoinError := s.Join(s.peers)
+		if firstJoinError != nil {
+			glog.V(0).Infoln("No existing server found. Starting as leader in the new cluster.")
+			_, err := s.raftServer.Do(&raft.DefaultJoinCommand{
+				Name:             s.raftServer.Name(),
+				ConnectionString: "http://" + s.httpAddr,
+			})
+			if err != nil {
+				glog.V(0).Infoln(err)
+				return nil
 			}
 		}
-
-		// Initialize the server by joining itself.
 	} else if s.raftServer.IsLogEmpty() {
+		// Initialize the server by joining itself.
 		glog.V(0).Infoln("Initializing new cluster")
 
 		_, err := s.raftServer.Do(&raft.DefaultJoinCommand{
@@ -95,7 +100,7 @@ func NewRaftServer(r *mux.Router, peers []string, httpAddr string, dataDir strin
 		}
 
 	} else {
-		glog.V(0).Infoln("Recovered from log")
+		glog.V(0).Infoln("Old conf,log,snapshot should have been removed.")
 	}
 
 	return s
diff --git a/go/weed/weed_server/raft_server_handlers.go b/go/weed/weed_server/raft_server_handlers.go
index 4d51c0767..b466d9afa 100644
--- a/go/weed/weed_server/raft_server_handlers.go
+++ b/go/weed/weed_server/raft_server_handlers.go
@@ -1,13 +1,14 @@
 package weed_server
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/operation"
 	"encoding/json"
-	"github.com/goraft/raft"
 	"io/ioutil"
 	"net/http"
 	"strings"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/goraft/raft"
 )
 
 // Handles incoming RAFT joins.
diff --git a/go/weed/weed_server/volume_server.go b/go/weed/weed_server/volume_server.go
index 2a9085f3b..0a65fd2f6 100644
--- a/go/weed/weed_server/volume_server.go
+++ b/go/weed/weed_server/volume_server.go
@@ -1,12 +1,13 @@
 package weed_server
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/storage"
 	"math/rand"
 	"net/http"
 	"strconv"
 	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/storage"
 )
 
 type VolumeServer struct {
diff --git a/go/weed/weed_server/volume_server_handlers.go b/go/weed/weed_server/volume_server_handlers.go
index ce14f6a87..83f614941 100644
--- a/go/weed/weed_server/volume_server_handlers.go
+++ b/go/weed/weed_server/volume_server_handlers.go
@@ -1,12 +1,6 @@
 package weed_server
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
-	"github.com/chrislusf/weed-fs/go/images"
-	"github.com/chrislusf/weed-fs/go/operation"
-	"github.com/chrislusf/weed-fs/go/stats"
-	"github.com/chrislusf/weed-fs/go/storage"
-	"github.com/chrislusf/weed-fs/go/topology"
 	"io"
 	"mime"
 	"mime/multipart"
@@ -14,6 +8,13 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/chrislusf/weed-fs/go/glog"
+	"github.com/chrislusf/weed-fs/go/images"
+	"github.com/chrislusf/weed-fs/go/operation"
+	"github.com/chrislusf/weed-fs/go/stats"
+	"github.com/chrislusf/weed-fs/go/storage"
+	"github.com/chrislusf/weed-fs/go/topology"
 )
 
 var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
diff --git a/go/weed/weed_server/volume_server_handlers_admin.go b/go/weed/weed_server/volume_server_handlers_admin.go
index 1118c8017..caf4c3be8 100644
--- a/go/weed/weed_server/volume_server_handlers_admin.go
+++ b/go/weed/weed_server/volume_server_handlers_admin.go
@@ -1,11 +1,12 @@
 package weed_server
 
 import (
+	"net/http"
+	"path/filepath"
+
 	"github.com/chrislusf/weed-fs/go/glog"
 	"github.com/chrislusf/weed-fs/go/stats"
 	"github.com/chrislusf/weed-fs/go/util"
-	"net/http"
-	"path/filepath"
 )
 
 func (vs *VolumeServer) statusHandler(w http.ResponseWriter, r *http.Request) {
diff --git a/go/weed/weed_server/volume_server_handlers_vacuum.go b/go/weed/weed_server/volume_server_handlers_vacuum.go
index b0600d799..f115e3b8b 100644
--- a/go/weed/weed_server/volume_server_handlers_vacuum.go
+++ b/go/weed/weed_server/volume_server_handlers_vacuum.go
@@ -1,8 +1,9 @@
 package weed_server
 
 import (
-	"github.com/chrislusf/weed-fs/go/glog"
 	"net/http"
+
+	"github.com/chrislusf/weed-fs/go/glog"
 )
 
 func (vs *VolumeServer) vacuumVolumeCheckHandler(w http.ResponseWriter, r *http.Request) {