fix bug: upload a file which already existed return a wrong file size.

go/storage/store.go

@@ -33,6 +33,10 @@ type MasterNodes struct {
 	lastNode int
 }
 
+func (mn *MasterNodes) String() string {
+	return fmt.Sprintf("nodes:%v, lastNode:%d", mn.nodes, mn.lastNode)
+}
+
 func NewMasterNodes(bootstrapNode string) (mn *MasterNodes) {
 	mn = &MasterNodes{nodes: []string{bootstrapNode}, lastNode: -1}
 	return
@@ -65,6 +69,9 @@ func (mn *MasterNodes) findMaster() (string, error) {
 	return mn.nodes[mn.lastNode], nil
 }
 
+/*
+ * A VolumeServer contains one Store
+ */
 type Store struct {
 	Port            int
 	Ip              string
@@ -77,6 +84,11 @@ type Store struct {
 	masterNodes     *MasterNodes
 }
 
+func (s *Store) String() (str string) {
+	str = fmt.Sprintf("Ip:%s, Port:%d, PublicUrl:%s, dataCenter:%s, rack:%s, connected:%v, volumeSizeLimit:%d, masterNodes:%s", s.Ip, s.Port, s.PublicUrl, s.dataCenter, s.rack, s.connected, s.volumeSizeLimit, s.masterNodes)
+	return
+}
+
 func NewStore(port int, ip, publicUrl string, dirnames []string, maxVolumeCounts []int) (s *Store) {
 	s = &Store{Port: port, Ip: ip, PublicUrl: publicUrl}
 	s.Locations = make([]*DiskLocation, 0)