diff --git a/weed/command/mount.go b/weed/command/mount.go
index a7f836a4c..f09b285f7 100644
--- a/weed/command/mount.go
+++ b/weed/command/mount.go
@@ -10,7 +10,7 @@ type MountOptions struct {
 	filer              *string
 	filerMountRootPath *string
 	dir                *string
-	dirListingLimit    *int64
+	dirListCacheLimit  *int64
 	collection         *string
 	replication        *string
 	ttlSec             *int
@@ -31,7 +31,7 @@ func init() {
 	mountOptions.filer = cmdMount.Flag.String("filer", "localhost:8888", "weed filer location")
 	mountOptions.filerMountRootPath = cmdMount.Flag.String("filer.path", "/", "mount this remote path from filer server")
 	mountOptions.dir = cmdMount.Flag.String("dir", ".", "mount weed filer to this directory")
-	mountOptions.dirListingLimit = cmdMount.Flag.Int64("dirListLimit", 1000000, "limit directory listing size")
+	mountOptions.dirListCacheLimit = cmdMount.Flag.Int64("dirListCacheLimit", 1000000, "limit cache size to speed up directory long format listing")
 	mountOptions.collection = cmdMount.Flag.String("collection", "", "collection to create the files")
 	mountOptions.replication = cmdMount.Flag.String("replication", "", "replication(e.g. 000, 001) to create to files. If empty, let filer decide.")
 	mountOptions.ttlSec = cmdMount.Flag.Int("ttl", 0, "file ttl in seconds")
diff --git a/weed/command/mount_std.go b/weed/command/mount_std.go
index 6f9166330..453531d00 100644
--- a/weed/command/mount_std.go
+++ b/weed/command/mount_std.go
@@ -43,13 +43,13 @@ func runMount(cmd *Command, args []string) bool {
 		*mountOptions.chunkSizeLimitMB,
 		*mountOptions.allowOthers,
 		*mountOptions.ttlSec,
-		*mountOptions.dirListingLimit,
+		*mountOptions.dirListCacheLimit,
 		os.FileMode(umask),
 	)
 }
 
 func RunMount(filer, filerMountRootPath, dir, collection, replication, dataCenter string, chunkSizeLimitMB int,
-	allowOthers bool, ttlSec int, dirListingLimit int64, umask os.FileMode) bool {
+	allowOthers bool, ttlSec int, dirListCacheLimit int64, umask os.FileMode) bool {
 
 	util.LoadConfiguration("security", false)
 
@@ -155,7 +155,7 @@ func RunMount(filer, filerMountRootPath, dir, collection, replication, dataCente
 		TtlSec:             int32(ttlSec),
 		ChunkSizeLimit:     int64(chunkSizeLimitMB) * 1024 * 1024,
 		DataCenter:         dataCenter,
-		DirListingLimit:    dirListingLimit,
+		DirListCacheLimit:  dirListCacheLimit,
 		EntryCacheTtl:      3 * time.Second,
 		MountUid:           uid,
 		MountGid:           gid,
diff --git a/weed/filesys/wfs.go b/weed/filesys/wfs.go
index 9711a1e24..e924783ec 100644
--- a/weed/filesys/wfs.go
+++ b/weed/filesys/wfs.go
@@ -27,7 +27,7 @@ type Option struct {
 	TtlSec             int32
 	ChunkSizeLimit     int64
 	DataCenter         string
-	DirListingLimit    int64
+	DirListCacheLimit  int64
 	EntryCacheTtl      time.Duration
 	Umask              os.FileMode
 
@@ -61,7 +61,7 @@ type statsCache struct {
 func NewSeaweedFileSystem(option *Option) *WFS {
 	wfs := &WFS{
 		option:                    option,
-		listDirectoryEntriesCache: ccache.New(ccache.Configure().MaxSize(option.DirListingLimit * 3).ItemsToPrune(100)),
+		listDirectoryEntriesCache: ccache.New(ccache.Configure().MaxSize(option.DirListCacheLimit * 3).ItemsToPrune(100)),
 		pathToHandleIndex:         make(map[string]int),
 		bufPool: sync.Pool{
 			New: func() interface{} {