diff --git a/cli/command/format.go b/cli/command/format.go
index be6bb3c03..7d1036017 100644
--- a/cli/command/format.go
+++ b/cli/command/format.go
@@ -39,9 +39,10 @@ import (
 
 const (
 	FORMAT_EXAMPLE = `Examples:
-  $ curveadm format -f /path/to/format.yaml           # Format chunkfile pool with specified configure file
-  $ curveadm format --status -f /path/to/format.yaml  # Display formatting status
-  $ curveadm format --stop   -f /path/to/format.yaml  # Stop formatting progress`
+  $ curveadm format -f /path/to/format.yaml              # Format chunkfile pool with specified configure file
+  $ curveadm format -f /path/to/format.yaml --increment  # Incremental Format chunkfile pool with specified configure file
+  $ curveadm format --status -f /path/to/format.yaml     # Display formatting status
+  $ curveadm format --stop   -f /path/to/format.yaml     # Stop formatting progress`
 )
 
 var (
@@ -62,6 +63,7 @@ type formatOptions struct {
 	filename   string
 	showStatus bool
 	stopFormat bool
+	increment  bool
 }
 
 func NewFormatCommand(curveadm *cli.CurveAdm) *cobra.Command {
@@ -82,6 +84,7 @@ func NewFormatCommand(curveadm *cli.CurveAdm) *cobra.Command {
 	flags.StringVarP(&options.filename, "formatting", "f", "format.yaml", "Specify the configure file for formatting chunkfile pool")
 	flags.BoolVar(&options.showStatus, "status", false, "Show formatting status")
 	flags.BoolVar(&options.stopFormat, "stop", false, "Stop formatting progress")
+	flags.BoolVar(&options.increment, "increment", false, "Incremental formatting")
 
 	return cmd
 }
@@ -112,6 +115,9 @@ func genFormatPlaybook(curveadm *cli.CurveAdm,
 			ExecOptions: playbook.ExecOptions{
 				SilentSubBar: options.showStatus,
 			},
+			Options: map[string]interface{}{
+				comm.FORMAT_INCREMENTAL: options.increment,
+			},
 		})
 	}
 	return pb, nil
diff --git a/internal/common/common.go b/internal/common/common.go
index c12b801d0..bce5d99ad 100644
--- a/internal/common/common.go
+++ b/internal/common/common.go
@@ -67,6 +67,7 @@ const (
 
 	// format
 	KEY_ALL_FORMAT_STATUS = "ALL_FORMAT_STATUS"
+	FORMAT_INCREMENTAL    = "FORMAT_INCREMENTAL"
 
 	// check
 	KEY_CHECK_WITH_WEAK          = "CHECK_WITH_WEAK"
diff --git a/internal/task/scripts/format.go b/internal/task/scripts/format.go
index 826fcf137..c065571d4 100644
--- a/internal/task/scripts/format.go
+++ b/internal/task/scripts/format.go
@@ -28,12 +28,40 @@ percent=$2
 chunkfile_size=$3
 chunkfile_pool_dir=$4
 chunkfile_pool_meta_path=$5
+increment_format=$6
 
 mkdir -p $chunkfile_pool_dir
-$binary \
-  -allocatePercent=$percent \
-  -fileSize=$chunkfile_size \
-  -filePoolDir=$chunkfile_pool_dir \
-  -filePoolMetaPath=$chunkfile_pool_meta_path \
-  -fileSystemPath=$chunkfile_pool_dir
+
+if [ $increment_format == "true" ]
+then
+	rootdir=$(dirname $chunkfile_pool_dir) 
+	used=$(df $rootdir --output=used|tail -n 1)
+	avail=$(df $rootdir --output=avail|tail -n 1)
+	size=$(df $rootdir --output=size|tail -n 1)
+	used_percent=$(df $rootdir --output=pcent|tail -n 1|sed 's/%//'|xargs)
+    let minus=$percent-$used_percent
+    
+    if [ $minus -gt 0 ]
+    then
+      let file_size=$chunkfile_size+4096
+      let pre_allocate_num=$minus*$size*1024/100/$file_size
+
+      $binary \
+        -fileSize=$chunkfile_size \
+        -filePoolDir=$chunkfile_pool_dir \
+        -filePoolMetaPath=$chunkfile_pool_meta_path \
+        -fileSystemPath=$chunkfile_pool_dir \
+        -allocateByPercent=false \
+        -preAllocateNum=$pre_allocate_num
+    fi  
+else
+    $binary \
+      -allocatePercent=$percent \
+      -fileSize=$chunkfile_size \
+      -filePoolDir=$chunkfile_pool_dir \
+      -filePoolMetaPath=$chunkfile_pool_meta_path \
+      -fileSystemPath=$chunkfile_pool_dir
+fi
+
+
 `
diff --git a/internal/task/task/bs/format.go b/internal/task/task/bs/format.go
index e9a04aafc..a9a711c65 100644
--- a/internal/task/task/bs/format.go
+++ b/internal/task/task/bs/format.go
@@ -24,6 +24,7 @@ package bs
 
 import (
 	"fmt"
+	comm "github.com/opencurve/curveadm/internal/common"
 	"regexp"
 	"strings"
 	"time"
@@ -245,8 +246,9 @@ func NewFormatChunkfilePoolTask(curveadm *cli.CurveAdm, fc *configure.FormatConf
 	chunkfilePoolRootDir := layout.ChunkfilePoolRootDir
 	formatScript := scripts.SCRIPT_FORMAT
 	formatScriptPath := fmt.Sprintf("%s/format.sh", layout.ToolsBinDir)
-	formatCommand := fmt.Sprintf("%s %s %d %d %s %s", formatScriptPath, layout.FormatBinaryPath,
-		usagePercent, DEFAULT_CHUNKFILE_SIZE, layout.ChunkfilePoolDir, layout.ChunkfilePoolMetaPath)
+	increment := curveadm.MemStorage().Get(comm.FORMAT_INCREMENTAL).(bool)
+	formatCommand := fmt.Sprintf("%s %s %d %d %s %s %t", formatScriptPath, layout.FormatBinaryPath,
+		usagePercent, DEFAULT_CHUNKFILE_SIZE, layout.ChunkfilePoolDir, layout.ChunkfilePoolMetaPath, increment)
 
 	// 1: skip if formating container exist
 	t.AddStep(&step.ListContainers{
@@ -278,10 +280,12 @@ func NewFormatChunkfilePoolTask(curveadm *cli.CurveAdm, fc *configure.FormatConf
 		Paths:       []string{mountPoint},
 		ExecOptions: curveadm.ExecOptions(),
 	})
-	t.AddStep(&step.CreateFilesystem{ // mkfs.ext4 MOUNT_POINT
-		Device:      device,
-		ExecOptions: curveadm.ExecOptions(),
-	})
+	if !increment {
+		t.AddStep(&step.CreateFilesystem{ // mkfs.ext4 MOUNT_POINT
+			Device:      device,
+			ExecOptions: curveadm.ExecOptions(),
+		})
+	}
 	t.AddStep(&step.MountFilesystem{
 		Source:      device,
 		Directory:   mountPoint,