func createDump(otype byte, obj []byte) []byte {
var b bytes.Buffer
c := digest.New()
w := io.MultiWriter(&b, c)
w.Write([]byte{otype})
w.Write(obj)
binary.Write(w, binary.LittleEndian, uint16(Version))
binary.Write(w, binary.LittleEndian, c.Sum64())
return b.Bytes()
}
func NewLoader(r io.Reader) *Loader {
l := &Loader{}
l.crc = digest.New()
l.rdbReader = newRdbReader(io.TeeReader(r, l.crc))
return l
}