diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
index a52e0e5..eb407f5 100644
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@@ -58,6 +58,10 @@
 			"ImportPath": "github.com/siddontang/go/sync2",
 			"Rev": "c2b33271306fcb7c6532efceac33ec45ee2439e0"
 		},
+		{
+			"ImportPath": "github.com/siddontang/rdb",
+			"Rev": "fc89ed2e418d27e3ea76e708e54276d2b44ae9cf"
+		},
 		{
 			"ImportPath": "github.com/syndtr/goleveldb/leveldb",
 			"Rev": "e9e2c8f6d3b9c313fb4acaac5ab06285bcf30b04"
diff --git a/Godeps/_workspace/src/github.com/siddontang/rdb/LICENSE b/Godeps/_workspace/src/github.com/siddontang/rdb/LICENSE
new file mode 100644
index 0000000..c16e3af
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/siddontang/rdb/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 siddontang
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/Godeps/_workspace/src/github.com/siddontang/rdb/README.md b/Godeps/_workspace/src/github.com/siddontang/rdb/README.md
new file mode 100644
index 0000000..aa1582e
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/siddontang/rdb/README.md
@@ -0,0 +1,3 @@
+# rdb
+
+Handling Redis RDB format.
diff --git a/ledis/rdb/decode.go b/Godeps/_workspace/src/github.com/siddontang/rdb/decode.go
similarity index 97%
rename from ledis/rdb/decode.go
rename to Godeps/_workspace/src/github.com/siddontang/rdb/decode.go
index 06cd392..865d241 100644
--- a/ledis/rdb/decode.go
+++ b/Godeps/_workspace/src/github.com/siddontang/rdb/decode.go
@@ -40,7 +40,7 @@ func (d *decoder) Set(key, value []byte, expiry int64) {
 }
 
 func (d *decoder) StartHash(key []byte, length, expiry int64) {
-	d.initObject(HashMap(nil))
+	d.initObject(Hash(nil))
 }
 
 func (d *decoder) Hset(key, field, value []byte) {
@@ -50,7 +50,7 @@ func (d *decoder) Hset(key, field, value []byte) {
 	switch h := d.obj.(type) {
 	default:
 		d.err = fmt.Errorf("invalid object, not a hashmap")
-	case HashMap:
+	case Hash:
 		v := struct {
 			Field, Value []byte
 		}{
@@ -118,7 +118,7 @@ func (d *decoder) Zadd(key []byte, score float64, member []byte) {
 
 type String []byte
 type List [][]byte
-type HashMap []struct {
+type Hash []struct {
 	Field, Value []byte
 }
 type Set [][]byte
diff --git a/Godeps/_workspace/src/github.com/siddontang/rdb/digest.go b/Godeps/_workspace/src/github.com/siddontang/rdb/digest.go
new file mode 100644
index 0000000..b59e4df
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/siddontang/rdb/digest.go
@@ -0,0 +1,106 @@
+// Copyright 2014 Wandoujia Inc. All Rights Reserved.
+// Licensed under the MIT (MIT-LICENSE.txt) license.
+
+package rdb
+
+import (
+	"encoding/binary"
+	"hash"
+)
+
+var crc64_table = [256]uint64{
+	0x0000000000000000, 0x7ad870c830358979, 0xf5b0e190606b12f2, 0x8f689158505e9b8b,
+	0xc038e5739841b68f, 0xbae095bba8743ff6, 0x358804e3f82aa47d, 0x4f50742bc81f2d04,
+	0xab28ecb46814fe75, 0xd1f09c7c5821770c, 0x5e980d24087fec87, 0x24407dec384a65fe,
+	0x6b1009c7f05548fa, 0x11c8790fc060c183, 0x9ea0e857903e5a08, 0xe478989fa00bd371,
+	0x7d08ff3b88be6f81, 0x07d08ff3b88be6f8, 0x88b81eabe8d57d73, 0xf2606e63d8e0f40a,
+	0xbd301a4810ffd90e, 0xc7e86a8020ca5077, 0x4880fbd87094cbfc, 0x32588b1040a14285,
+	0xd620138fe0aa91f4, 0xacf86347d09f188d, 0x2390f21f80c18306, 0x594882d7b0f40a7f,
+	0x1618f6fc78eb277b, 0x6cc0863448deae02, 0xe3a8176c18803589, 0x997067a428b5bcf0,
+	0xfa11fe77117cdf02, 0x80c98ebf2149567b, 0x0fa11fe77117cdf0, 0x75796f2f41224489,
+	0x3a291b04893d698d, 0x40f16bccb908e0f4, 0xcf99fa94e9567b7f, 0xb5418a5cd963f206,
+	0x513912c379682177, 0x2be1620b495da80e, 0xa489f35319033385, 0xde51839b2936bafc,
+	0x9101f7b0e12997f8, 0xebd98778d11c1e81, 0x64b116208142850a, 0x1e6966e8b1770c73,
+	0x8719014c99c2b083, 0xfdc17184a9f739fa, 0x72a9e0dcf9a9a271, 0x08719014c99c2b08,
+	0x4721e43f0183060c, 0x3df994f731b68f75, 0xb29105af61e814fe, 0xc849756751dd9d87,
+	0x2c31edf8f1d64ef6, 0x56e99d30c1e3c78f, 0xd9810c6891bd5c04, 0xa3597ca0a188d57d,
+	0xec09088b6997f879, 0x96d1784359a27100, 0x19b9e91b09fcea8b, 0x636199d339c963f2,
+	0xdf7adabd7a6e2d6f, 0xa5a2aa754a5ba416, 0x2aca3b2d1a053f9d, 0x50124be52a30b6e4,
+	0x1f423fcee22f9be0, 0x659a4f06d21a1299, 0xeaf2de5e82448912, 0x902aae96b271006b,
+	0x74523609127ad31a, 0x0e8a46c1224f5a63, 0x81e2d7997211c1e8, 0xfb3aa75142244891,
+	0xb46ad37a8a3b6595, 0xceb2a3b2ba0eecec, 0x41da32eaea507767, 0x3b024222da65fe1e,
+	0xa2722586f2d042ee, 0xd8aa554ec2e5cb97, 0x57c2c41692bb501c, 0x2d1ab4dea28ed965,
+	0x624ac0f56a91f461, 0x1892b03d5aa47d18, 0x97fa21650afae693, 0xed2251ad3acf6fea,
+	0x095ac9329ac4bc9b, 0x7382b9faaaf135e2, 0xfcea28a2faafae69, 0x8632586aca9a2710,
+	0xc9622c4102850a14, 0xb3ba5c8932b0836d, 0x3cd2cdd162ee18e6, 0x460abd1952db919f,
+	0x256b24ca6b12f26d, 0x5fb354025b277b14, 0xd0dbc55a0b79e09f, 0xaa03b5923b4c69e6,
+	0xe553c1b9f35344e2, 0x9f8bb171c366cd9b, 0x10e3202993385610, 0x6a3b50e1a30ddf69,
+	0x8e43c87e03060c18, 0xf49bb8b633338561, 0x7bf329ee636d1eea, 0x012b592653589793,
+	0x4e7b2d0d9b47ba97, 0x34a35dc5ab7233ee, 0xbbcbcc9dfb2ca865, 0xc113bc55cb19211c,
+	0x5863dbf1e3ac9dec, 0x22bbab39d3991495, 0xadd33a6183c78f1e, 0xd70b4aa9b3f20667,
+	0x985b3e827bed2b63, 0xe2834e4a4bd8a21a, 0x6debdf121b863991, 0x1733afda2bb3b0e8,
+	0xf34b37458bb86399, 0x8993478dbb8deae0, 0x06fbd6d5ebd3716b, 0x7c23a61ddbe6f812,
+	0x3373d23613f9d516, 0x49aba2fe23cc5c6f, 0xc6c333a67392c7e4, 0xbc1b436e43a74e9d,
+	0x95ac9329ac4bc9b5, 0xef74e3e19c7e40cc, 0x601c72b9cc20db47, 0x1ac40271fc15523e,
+	0x5594765a340a7f3a, 0x2f4c0692043ff643, 0xa02497ca54616dc8, 0xdafce7026454e4b1,
+	0x3e847f9dc45f37c0, 0x445c0f55f46abeb9, 0xcb349e0da4342532, 0xb1eceec59401ac4b,
+	0xfebc9aee5c1e814f, 0x8464ea266c2b0836, 0x0b0c7b7e3c7593bd, 0x71d40bb60c401ac4,
+	0xe8a46c1224f5a634, 0x927c1cda14c02f4d, 0x1d148d82449eb4c6, 0x67ccfd4a74ab3dbf,
+	0x289c8961bcb410bb, 0x5244f9a98c8199c2, 0xdd2c68f1dcdf0249, 0xa7f41839ecea8b30,
+	0x438c80a64ce15841, 0x3954f06e7cd4d138, 0xb63c61362c8a4ab3, 0xcce411fe1cbfc3ca,
+	0x83b465d5d4a0eece, 0xf96c151de49567b7, 0x76048445b4cbfc3c, 0x0cdcf48d84fe7545,
+	0x6fbd6d5ebd3716b7, 0x15651d968d029fce, 0x9a0d8ccedd5c0445, 0xe0d5fc06ed698d3c,
+	0xaf85882d2576a038, 0xd55df8e515432941, 0x5a3569bd451db2ca, 0x20ed197575283bb3,
+	0xc49581ead523e8c2, 0xbe4df122e51661bb, 0x3125607ab548fa30, 0x4bfd10b2857d7349,
+	0x04ad64994d625e4d, 0x7e7514517d57d734, 0xf11d85092d094cbf, 0x8bc5f5c11d3cc5c6,
+	0x12b5926535897936, 0x686de2ad05bcf04f, 0xe70573f555e26bc4, 0x9ddd033d65d7e2bd,
+	0xd28d7716adc8cfb9, 0xa85507de9dfd46c0, 0x273d9686cda3dd4b, 0x5de5e64efd965432,
+	0xb99d7ed15d9d8743, 0xc3450e196da80e3a, 0x4c2d9f413df695b1, 0x36f5ef890dc31cc8,
+	0x79a59ba2c5dc31cc, 0x037deb6af5e9b8b5, 0x8c157a32a5b7233e, 0xf6cd0afa9582aa47,
+	0x4ad64994d625e4da, 0x300e395ce6106da3, 0xbf66a804b64ef628, 0xc5bed8cc867b7f51,
+	0x8aeeace74e645255, 0xf036dc2f7e51db2c, 0x7f5e4d772e0f40a7, 0x05863dbf1e3ac9de,
+	0xe1fea520be311aaf, 0x9b26d5e88e0493d6, 0x144e44b0de5a085d, 0x6e963478ee6f8124,
+	0x21c640532670ac20, 0x5b1e309b16452559, 0xd476a1c3461bbed2, 0xaeaed10b762e37ab,
+	0x37deb6af5e9b8b5b, 0x4d06c6676eae0222, 0xc26e573f3ef099a9, 0xb8b627f70ec510d0,
+	0xf7e653dcc6da3dd4, 0x8d3e2314f6efb4ad, 0x0256b24ca6b12f26, 0x788ec2849684a65f,
+	0x9cf65a1b368f752e, 0xe62e2ad306bafc57, 0x6946bb8b56e467dc, 0x139ecb4366d1eea5,
+	0x5ccebf68aecec3a1, 0x2616cfa09efb4ad8, 0xa97e5ef8cea5d153, 0xd3a62e30fe90582a,
+	0xb0c7b7e3c7593bd8, 0xca1fc72bf76cb2a1, 0x45775673a732292a, 0x3faf26bb9707a053,
+	0x70ff52905f188d57, 0x0a2722586f2d042e, 0x854fb3003f739fa5, 0xff97c3c80f4616dc,
+	0x1bef5b57af4dc5ad, 0x61372b9f9f784cd4, 0xee5fbac7cf26d75f, 0x9487ca0fff135e26,
+	0xdbd7be24370c7322, 0xa10fceec0739fa5b, 0x2e675fb4576761d0, 0x54bf2f7c6752e8a9,
+	0xcdcf48d84fe75459, 0xb71738107fd2dd20, 0x387fa9482f8c46ab, 0x42a7d9801fb9cfd2,
+	0x0df7adabd7a6e2d6, 0x772fdd63e7936baf, 0xf8474c3bb7cdf024, 0x829f3cf387f8795d,
+	0x66e7a46c27f3aa2c, 0x1c3fd4a417c62355, 0x935745fc4798b8de, 0xe98f353477ad31a7,
+	0xa6df411fbfb21ca3, 0xdc0731d78f8795da, 0x536fa08fdfd90e51, 0x29b7d047efec8728}
+
+type digest struct {
+	crc uint64
+}
+
+func (d *digest) update(p []byte) {
+	for _, b := range p {
+		d.crc = crc64_table[byte(d.crc)^b] ^ (d.crc >> 8)
+	}
+}
+
+func newDigest() hash.Hash64 {
+	d := &digest{}
+	return d
+}
+
+func (d *digest) Write(p []byte) (int, error) {
+	d.update(p)
+	return len(p), nil
+}
+
+func (d *digest) Sum(in []byte) []byte {
+	buf := make([]byte, 8)
+	binary.LittleEndian.PutUint64(buf, d.crc)
+	return append(in, buf...)
+}
+
+func (d *digest) Sum64() uint64  { return d.crc }
+func (d *digest) BlockSize() int { return 1 }
+func (d *digest) Size() int      { return 8 }
+func (d *digest) Reset()         { d.crc = 0 }
diff --git a/ledis/rdb/encode.go b/Godeps/_workspace/src/github.com/siddontang/rdb/encode.go
similarity index 98%
rename from ledis/rdb/encode.go
rename to Godeps/_workspace/src/github.com/siddontang/rdb/encode.go
index 1c33cb0..19c48c3 100644
--- a/ledis/rdb/encode.go
+++ b/Godeps/_workspace/src/github.com/siddontang/rdb/encode.go
@@ -15,7 +15,7 @@ func Dump(obj interface{}) ([]byte, error) {
 	case String:
 		e.EncodeType(rdb.TypeString)
 		e.EncodeString(v)
-	case HashMap:
+	case Hash:
 		e.EncodeType(rdb.TypeHash)
 		e.EncodeLength(uint32(len(v)))
 
diff --git a/Godeps/_workspace/src/github.com/siddontang/rdb/loader.go b/Godeps/_workspace/src/github.com/siddontang/rdb/loader.go
new file mode 100644
index 0000000..22743cb
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/siddontang/rdb/loader.go
@@ -0,0 +1,112 @@
+// Copyright 2014 Wandoujia Inc. All Rights Reserved.
+// Licensed under the MIT (MIT-LICENSE.txt) license.
+
+package rdb
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"hash"
+	"io"
+	"strconv"
+)
+
+type Loader struct {
+	*rdbReader
+	crc hash.Hash64
+	db  uint32
+}
+
+func NewLoader(r io.Reader) *Loader {
+	l := &Loader{}
+	l.crc = newDigest()
+	l.rdbReader = newRdbReader(io.TeeReader(r, l.crc))
+	return l
+}
+
+func (l *Loader) LoadHeader() error {
+	header := make([]byte, 9)
+	if err := l.readFull(header); err != nil {
+		return err
+	}
+	if !bytes.Equal(header[:5], []byte("REDIS")) {
+		return fmt.Errorf("verify magic string, invalid file format")
+	}
+	if version, err := strconv.ParseInt(string(header[5:]), 10, 64); err != nil {
+		return err
+	} else if version <= 0 || version > Version {
+		return fmt.Errorf("verify version, invalid RDB version number %d", version)
+	}
+	return nil
+}
+
+func (l *Loader) LoadChecksum() error {
+	crc1 := l.crc.Sum64()
+	if crc2, err := l.readUint64(); err != nil {
+		return err
+	} else if crc1 != crc2 {
+		return fmt.Errorf("checksum validation failed")
+	}
+	return nil
+}
+
+type Entry struct {
+	DB       uint32
+	Key      []byte
+	ValDump  []byte
+	ExpireAt uint64
+}
+
+func (l *Loader) LoadEntry() (entry *Entry, err error) {
+	var expireat uint64
+	for {
+		var otype byte
+		if otype, err = l.readByte(); err != nil {
+			return
+		}
+		switch otype {
+		case rdbFlagExpiryMS:
+			if expireat, err = l.readUint64(); err != nil {
+				return
+			}
+		case rdbFlagExpiry:
+			var sec uint32
+			if sec, err = l.readUint32(); err != nil {
+				return
+			}
+			expireat = uint64(sec) * 1000
+		case rdbFlagSelectDB:
+			if l.db, err = l.readLength(); err != nil {
+				return
+			}
+		case rdbFlagEOF:
+			return
+		default:
+			var key, obj []byte
+			if key, err = l.readString(); err != nil {
+				return
+			}
+			if obj, err = l.readObject(otype); err != nil {
+				return
+			}
+			entry = &Entry{}
+			entry.DB = l.db
+			entry.Key = key
+			entry.ValDump = createValDump(otype, obj)
+			entry.ExpireAt = expireat
+			return
+		}
+	}
+}
+
+func createValDump(otype byte, obj []byte) []byte {
+	var b bytes.Buffer
+	c := newDigest()
+	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()
+}
diff --git a/Godeps/_workspace/src/github.com/siddontang/rdb/loader_test.go b/Godeps/_workspace/src/github.com/siddontang/rdb/loader_test.go
new file mode 100644
index 0000000..db8e2ee
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/siddontang/rdb/loader_test.go
@@ -0,0 +1,373 @@
+// Copyright 2014 Wandoujia Inc. All Rights Reserved.
+// Licensed under the MIT (MIT-LICENSE.txt) license.
+
+package rdb
+
+import (
+	"bytes"
+	"encoding/hex"
+	"fmt"
+	"math"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func AssertNoError(t *testing.T, err error) {
+	if err == nil {
+		return
+	}
+
+	t.Fatal(err)
+}
+
+func Assert(t *testing.T, b bool) {
+	if b {
+		return
+	}
+	t.Fatal("assertion failed")
+}
+
+func DecodeHexRdb(t *testing.T, s string, n int) map[string]*Entry {
+	p, err := hex.DecodeString(strings.NewReplacer("\t", "", "\r", "", "\n", "", " ", "").Replace(s))
+	AssertNoError(t, err)
+	r := bytes.NewReader(p)
+	l := NewLoader(r)
+	AssertNoError(t, l.LoadHeader())
+	entries := make(map[string]*Entry)
+	var i int = 0
+	for {
+		e, err := l.LoadEntry()
+		AssertNoError(t, err)
+		if e == nil {
+			break
+		}
+		Assert(t, e.DB == 0)
+		entries[string(e.Key)] = e
+		i++
+	}
+	AssertNoError(t, l.LoadChecksum())
+	Assert(t, r.Len() == 0)
+	Assert(t, len(entries) == i && i == n)
+	return entries
+}
+
+func getobj(t *testing.T, entries map[string]*Entry, key string) (*Entry, interface{}) {
+	e := entries[key]
+	Assert(t, e != nil)
+	val, err := DecodeDump(e.ValDump)
+	AssertNoError(t, err)
+	return e, val
+}
+
+/*
+#!/bin/bash
+./redis-cli flushall
+for i in 1 255 256 65535 65536 2147483647 2147483648 4294967295 4294967296 -2147483648; do
+    ./redis-cli set string_${i} ${i}
+done
+./redis-cli save && xxd -p -c 32 dump.rdb
+*/
+func TestLoadIntString(t *testing.T) {
+	s := `
+        524544495330303036fe00000a737472696e675f323535c1ff00000873747269
+        6e675f31c0010011737472696e675f343239343936373239360a343239343936
+        373239360011737472696e675f343239343936373239350a3432393439363732
+        39350012737472696e675f2d32313437343833363438c200000080000c737472
+        696e675f3635353335c2ffff00000011737472696e675f323134373438333634
+        380a32313437343833363438000c737472696e675f3635353336c20000010000
+        0a737472696e675f323536c100010011737472696e675f323134373438333634
+        37c2ffffff7fffe49d9f131fb5c3b5
+    `
+	values := []int{1, 255, 256, 65535, 65536, 2147483647, 2147483648, 4294967295, 4294967296, -2147483648}
+	entries := DecodeHexRdb(t, s, len(values))
+	for _, value := range values {
+		key := fmt.Sprintf("string_%d", value)
+		_, obj := getobj(t, entries, key)
+		val := obj.(String)
+		Assert(t, bytes.Equal([]byte(val), []byte(strconv.Itoa(value))))
+	}
+}
+
+/*
+#!/bin/bash
+./redis-cli flushall
+./redis-cli set string_ttls string_ttls
+./redis-cli expireat string_ttls 1500000000
+./redis-cli set string_ttlms string_ttlms
+./redis-cli pexpireat string_ttlms 1500000000000
+./redis-cli save && xxd -p -c 32 dump.rdb
+*/
+func TestLoadStringTTL(t *testing.T) {
+	s := `
+        524544495330303036fe00fc0098f73e5d010000000c737472696e675f74746c
+        6d730c737472696e675f74746c6d73fc0098f73e5d010000000b737472696e67
+        5f74746c730b737472696e675f74746c73ffd15acd935a3fe949
+    `
+	expireat := uint64(1500000000000)
+	entries := DecodeHexRdb(t, s, 2)
+	keys := []string{"string_ttls", "string_ttlms"}
+	for _, key := range keys {
+		e, obj := getobj(t, entries, key)
+		val := obj.(String)
+		Assert(t, bytes.Equal([]byte(val), []byte(key)))
+		Assert(t, e.ExpireAt == expireat)
+	}
+}
+
+/*
+#!/bin/bash
+s="01"
+for ((i=0;i<15;i++)); do
+    s=$s$s
+done
+./redis-cli flushall
+./redis-cli set string_long $s
+./redis-cli save && xxd -p -c 32 dump.rdb
+*/
+func TestLoadLongString(t *testing.T) {
+	s := `
+        524544495330303036fe00000b737472696e675f6c6f6e67c342f28000010000
+        02303130e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0
+        ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01
+        e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff
+        01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0
+        ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01
+        e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff
+        01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0
+        ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01
+        e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff
+        01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0
+        ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01
+        e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff
+        01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0
+        ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01
+        e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff
+        01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0
+        ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01
+        e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff
+        01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0
+        ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01
+        e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff
+        01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0
+        ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01e0ff01
+        e0ff01e0ff01e0ff01e0ff01e03201013031ffdfdb02bd6d5da5e6
+    `
+	entries := DecodeHexRdb(t, s, 1)
+	_, obj := getobj(t, entries, "string_long")
+	val := []byte(obj.(String))
+	for i := 0; i < (1 << 15); i++ {
+		var c uint8 = '0'
+		if i%2 != 0 {
+			c = '1'
+		}
+		Assert(t, val[i] == c)
+	}
+}
+
+/*
+#!/bin/bash
+./redis-cli flushall
+for ((i=0;i<256;i++)); do
+    ./redis-cli rpush list_lzf 0
+    ./redis-cli rpush list_lzf 1
+done
+./redis-cli save && xxd -p -c 32 dump.rdb
+*/
+func TestLoadListZipmap(t *testing.T) {
+	s := `
+        524544495330303036fe000a086c6973745f6c7a66c31f440b040b0400000820
+        0306000200f102f202e0ff03e1ff07e1ff07e1d90701f2ffff6a1c2d51c02301
+        16
+    `
+	entries := DecodeHexRdb(t, s, 1)
+	_, obj := getobj(t, entries, "list_lzf")
+	val := obj.(List)
+	Assert(t, len(val) == 512)
+	for i := 0; i < 256; i++ {
+		var s string = "0"
+		if i%2 != 0 {
+			s = "1"
+		}
+		Assert(t, string(val[i]) == s)
+	}
+}
+
+/*
+#!/bin/bash
+./redis-cli flushall
+for ((i=0;i<32;i++)); do
+    ./redis-cli rpush list ${i}
+done
+./redis-cli save && xxd -p -c 32 dump.rdb
+*/
+func TestLoadList(t *testing.T) {
+	s := `
+        524544495330303036fe0001046c69737420c000c001c002c003c004c005c006
+        c007c008c009c00ac00bc00cc00dc00ec00fc010c011c012c013c014c015c016
+        c017c018c019c01ac01bc01cc01dc01ec01fff756ea1fa90adefe3
+    `
+	entries := DecodeHexRdb(t, s, 1)
+	_, obj := getobj(t, entries, "list")
+	val := obj.(List)
+	Assert(t, len(val) == 32)
+	for i := 0; i < 32; i++ {
+		Assert(t, string(val[i]) == strconv.Itoa(i))
+	}
+}
+
+/*
+#!/bin/bash
+./redis-cli flushall
+for ((i=0;i<16;i++)); do
+    ./redis-cli sadd set1 ${i}
+done
+for ((i=0;i<32;i++)); do
+    ./redis-cli sadd set2 ${i}
+done
+./redis-cli save && xxd -p -c 32 dump.rdb
+*/
+func TestLoadSetAndSetIntset(t *testing.T) {
+	s := `
+        524544495330303036fe0002047365743220c016c00dc01bc012c01ac004c014
+        c002c017c01dc01cc013c019c01ec008c006c000c001c007c00fc009c01fc00e
+        c003c00ac015c010c00bc018c011c00cc0050b04736574312802000000100000
+        0000000100020003000400050006000700080009000a000b000c000d000e000f
+        00ff3a0a9697324d19c3
+    `
+	entries := DecodeHexRdb(t, s, 2)
+
+	_, obj1 := getobj(t, entries, "set1")
+	val1 := obj1.(Set)
+	set1 := make(map[string]bool)
+	for _, mem := range val1 {
+		set1[string(mem)] = true
+	}
+	Assert(t, len(set1) == 16)
+	Assert(t, len(set1) == len(val1))
+	for i := 0; i < 16; i++ {
+		_, ok := set1[strconv.Itoa(i)]
+		Assert(t, ok)
+	}
+
+	_, obj2 := getobj(t, entries, "set2")
+	val2 := obj2.(Set)
+	set2 := make(map[string]bool)
+	for _, mem := range val2 {
+		set2[string(mem)] = true
+	}
+	Assert(t, len(set2) == 32)
+	Assert(t, len(set2) == len(val2))
+	for i := 0; i < 32; i++ {
+		_, ok := set2[strconv.Itoa(i)]
+		Assert(t, ok)
+	}
+}
+
+/*
+#!/bin/bash
+./redis-cli flushall
+for ((i=0;i<16;i++)); do
+    ./redis-cli hset hash1 ${i}
+done
+for ((i=-16;i<16;i++)); do
+    ./redis-cli hset hash2 ${i}
+done
+./redis-cli save && xxd -p -c 32 dump.rdb
+*/
+func TestLoadHashAndHashZiplist(t *testing.T) {
+	s := `
+        524544495330303036fe000405686173683220c00dc00dc0fcc0fcc0ffc0ffc0
+        04c004c002c002c0fbc0fbc0f0c0f0c0f9c0f9c008c008c0fac0fac006c006c0
+        00c000c001c001c0fec0fec007c007c0f6c0f6c00fc00fc009c009c0f7c0f7c0
+        fdc0fdc0f1c0f1c0f2c0f2c0f3c0f3c00ec00ec003c003c00ac00ac00bc00bc0
+        f8c0f8c00cc00cc0f5c0f5c0f4c0f4c005c0050d056861736831405151000000
+        4d000000200000f102f102f202f202f302f302f402f402f502f502f602f602f7
+        02f702f802f802f902f902fa02fa02fb02fb02fc02fc02fd02fd02fe0d03fe0d
+        03fe0e03fe0e03fe0f03fe0fffffa423d3036c15e534
+    `
+	entries := DecodeHexRdb(t, s, 2)
+
+	_, obj1 := getobj(t, entries, "hash1")
+	val1 := obj1.(Hash)
+	hash1 := make(map[string]string)
+	for _, ent := range val1 {
+		hash1[string(ent.Field)] = string(ent.Value)
+	}
+	Assert(t, len(hash1) == 16)
+	Assert(t, len(hash1) == len(val1))
+	for i := 0; i < 16; i++ {
+		s := strconv.Itoa(i)
+		Assert(t, hash1[s] == s)
+	}
+
+	_, obj2 := getobj(t, entries, "hash2")
+	val2 := obj2.(Hash)
+	hash2 := make(map[string]string)
+	for _, ent := range val2 {
+		hash2[string(ent.Field)] = string(ent.Value)
+	}
+	Assert(t, len(hash2) == 32)
+	Assert(t, len(hash2) == len(val2))
+	for i := -16; i < 16; i++ {
+		s := strconv.Itoa(i)
+		Assert(t, hash2[s] == s)
+	}
+}
+
+/*
+#!/bin/bash
+./redis-cli flushall
+for ((i=0;i<16;i++)); do
+    ./redis-cli zadd zset1 ${i} ${i}
+done
+for ((i=0;i<32;i++)); do
+    ./redis-cli zadd zset2 -${i} ${i}
+done
+./redis-cli save && xxd -p -c 32 dump.rdb
+*/
+func TestLoadZSetAndZSetZiplist(t *testing.T) {
+	s := `
+        524544495330303036fe0003057a7365743220c016032d3232c00d032d3133c0
+        1b032d3237c012032d3138c01a032d3236c004022d34c014032d3230c002022d
+        32c017032d3233c01d032d3239c01c032d3238c013032d3139c019032d3235c0
+        1e032d3330c008022d38c006022d36c000022d30c001022d31c007022d37c009
+        022d39c00f032d3135c01f032d3331c00e032d3134c003022d33c00a032d3130
+        c015032d3231c010032d3136c00b032d3131c018032d3234c011032d3137c00c
+        032d3132c005022d350c057a736574314051510000004d000000200000f102f1
+        02f202f202f302f302f402f402f502f502f602f602f702f702f802f802f902f9
+        02fa02fa02fb02fb02fc02fc02fd02fd02fe0d03fe0d03fe0e03fe0e03fe0f03
+        fe0fffff2addedbf4f5a8f93
+    `
+	entries := DecodeHexRdb(t, s, 2)
+
+	_, obj1 := getobj(t, entries, "zset1")
+	val1 := obj1.(ZSet)
+	zset1 := make(map[string]float64)
+	for _, ent := range val1 {
+		zset1[string(ent.Member)] = ent.Score
+	}
+	Assert(t, len(zset1) == 16)
+	Assert(t, len(zset1) == len(val1))
+	for i := 0; i < 16; i++ {
+		s := strconv.Itoa(i)
+		score, ok := zset1[s]
+		Assert(t, ok)
+		Assert(t, math.Abs(score-float64(i)) < 1e-10)
+	}
+
+	_, obj2 := getobj(t, entries, "zset2")
+	val2 := obj2.(ZSet)
+	zset2 := make(map[string]float64)
+	for _, ent := range val2 {
+		zset2[string(ent.Member)] = ent.Score
+	}
+	Assert(t, len(zset2) == 32)
+	Assert(t, len(zset2) == len(val2))
+	for i := 0; i < 32; i++ {
+		s := strconv.Itoa(i)
+		score, ok := zset2[s]
+		Assert(t, ok)
+		Assert(t, math.Abs(score+float64(i)) < 1e-10)
+	}
+}
diff --git a/ledis/rdb/rdb_test.go b/Godeps/_workspace/src/github.com/siddontang/rdb/rdb_test.go
similarity index 100%
rename from ledis/rdb/rdb_test.go
rename to Godeps/_workspace/src/github.com/siddontang/rdb/rdb_test.go
diff --git a/Godeps/_workspace/src/github.com/siddontang/rdb/reader.go b/Godeps/_workspace/src/github.com/siddontang/rdb/reader.go
new file mode 100644
index 0000000..89ae9ed
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/siddontang/rdb/reader.go
@@ -0,0 +1,332 @@
+// Copyright 2014 Wandoujia Inc. All Rights Reserved.
+// Licensed under the MIT (MIT-LICENSE.txt) license.
+
+package rdb
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"math"
+	"strconv"
+)
+
+const (
+	Version = 6
+)
+
+const (
+	rdbTypeString = 0
+	rdbTypeList   = 1
+	rdbTypeSet    = 2
+	rdbTypeZSet   = 3
+	rdbTypeHash   = 4
+
+	rdbTypeHashZipmap  = 9
+	rdbTypeListZiplist = 10
+	rdbTypeSetIntset   = 11
+	rdbTypeZSetZiplist = 12
+	rdbTypeHashZiplist = 13
+
+	rdbFlagExpiryMS = 0xfc
+	rdbFlagExpiry   = 0xfd
+	rdbFlagSelectDB = 0xfe
+	rdbFlagEOF      = 0xff
+)
+
+const (
+	rdb6bitLen  = 0
+	rdb14bitLen = 1
+	rdb32bitLen = 2
+	rdbEncVal   = 3
+
+	rdbEncInt8  = 0
+	rdbEncInt16 = 1
+	rdbEncInt32 = 2
+	rdbEncLZF   = 3
+
+	rdbZiplist6bitlenString  = 0
+	rdbZiplist14bitlenString = 1
+	rdbZiplist32bitlenString = 2
+
+	rdbZiplistInt16 = 0xc0
+	rdbZiplistInt32 = 0xd0
+	rdbZiplistInt64 = 0xe0
+	rdbZiplistInt24 = 0xf0
+	rdbZiplistInt8  = 0xfe
+	rdbZiplistInt4  = 15
+)
+
+type rdbReader struct {
+	raw   io.Reader
+	buf   [8]byte
+	nread int64
+}
+
+func newRdbReader(r io.Reader) *rdbReader {
+	return &rdbReader{raw: r}
+}
+
+func (r *rdbReader) Read(p []byte) (int, error) {
+	n, err := r.raw.Read(p)
+	r.nread += int64(n)
+	return n, err
+}
+
+func (r *rdbReader) offset() int64 {
+	return r.nread
+}
+
+func (r *rdbReader) readObject(otype byte) ([]byte, error) {
+	var b bytes.Buffer
+	r = newRdbReader(io.TeeReader(r, &b))
+	switch otype {
+	default:
+		return nil, fmt.Errorf("unknown object-type %02x", otype)
+	case rdbTypeHashZipmap:
+		fallthrough
+	case rdbTypeListZiplist:
+		fallthrough
+	case rdbTypeSetIntset:
+		fallthrough
+	case rdbTypeZSetZiplist:
+		fallthrough
+	case rdbTypeHashZiplist:
+		fallthrough
+	case rdbTypeString:
+		if _, err := r.readString(); err != nil {
+			return nil, err
+		}
+	case rdbTypeList, rdbTypeSet:
+		if n, err := r.readLength(); err != nil {
+			return nil, err
+		} else {
+			for i := 0; i < int(n); i++ {
+				if _, err := r.readString(); err != nil {
+					return nil, err
+				}
+			}
+		}
+	case rdbTypeZSet:
+		if n, err := r.readLength(); err != nil {
+			return nil, err
+		} else {
+			for i := 0; i < int(n); i++ {
+				if _, err := r.readString(); err != nil {
+					return nil, err
+				}
+				if _, err := r.readFloat(); err != nil {
+					return nil, err
+				}
+			}
+		}
+	case rdbTypeHash:
+		if n, err := r.readLength(); err != nil {
+			return nil, err
+		} else {
+			for i := 0; i < int(n); i++ {
+				if _, err := r.readString(); err != nil {
+					return nil, err
+				}
+				if _, err := r.readString(); err != nil {
+					return nil, err
+				}
+			}
+		}
+	}
+	return b.Bytes(), nil
+}
+
+func (r *rdbReader) readString() ([]byte, error) {
+	length, encoded, err := r.readEncodedLength()
+	if err != nil {
+		return nil, err
+	}
+	if !encoded {
+		return r.readBytes(int(length))
+	}
+	switch t := uint8(length); t {
+	default:
+		return nil, fmt.Errorf("invalid encoded-string %02x", t)
+	case rdbEncInt8:
+		i, err := r.readInt8()
+		return []byte(strconv.FormatInt(int64(i), 10)), err
+	case rdbEncInt16:
+		i, err := r.readInt16()
+		return []byte(strconv.FormatInt(int64(i), 10)), err
+	case rdbEncInt32:
+		i, err := r.readInt32()
+		return []byte(strconv.FormatInt(int64(i), 10)), err
+	case rdbEncLZF:
+		var inlen, outlen uint32
+		if inlen, err = r.readLength(); err != nil {
+			return nil, err
+		}
+		if outlen, err = r.readLength(); err != nil {
+			return nil, err
+		}
+		if in, err := r.readBytes(int(inlen)); err != nil {
+			return nil, err
+		} else {
+			return lzfDecompress(in, int(outlen))
+		}
+	}
+}
+
+func (r *rdbReader) readEncodedLength() (length uint32, encoded bool, err error) {
+	var u uint8
+	if u, err = r.readUint8(); err != nil {
+		return
+	}
+	length = uint32(u & 0x3f)
+	switch u >> 6 {
+	case rdb6bitLen:
+	case rdb14bitLen:
+		u, err = r.readUint8()
+		length = (length << 8) + uint32(u)
+	case rdbEncVal:
+		encoded = true
+	default:
+		length, err = r.readUint32BigEndian()
+	}
+	return
+}
+
+func (r *rdbReader) readLength() (uint32, error) {
+	length, encoded, err := r.readEncodedLength()
+	if err == nil && encoded {
+		err = fmt.Errorf("encoded-length")
+	}
+	return length, err
+}
+
+func (r *rdbReader) readFloat() (float64, error) {
+	u, err := r.readUint8()
+	if err != nil {
+		return 0, err
+	}
+	switch u {
+	case 253:
+		return math.NaN(), nil
+	case 254:
+		return math.Inf(0), nil
+	case 255:
+		return math.Inf(-1), nil
+	default:
+		if b, err := r.readBytes(int(u)); err != nil {
+			return 0, err
+		} else {
+			v, err := strconv.ParseFloat(string(b), 64)
+			return v, err
+		}
+	}
+}
+
+func (r *rdbReader) readByte() (byte, error) {
+	b := r.buf[:1]
+	_, err := r.Read(b)
+	return b[0], err
+}
+
+func (r *rdbReader) readFull(p []byte) error {
+	_, err := io.ReadFull(r, p)
+	return err
+}
+
+func (r *rdbReader) readBytes(n int) ([]byte, error) {
+	p := make([]byte, n)
+	return p, r.readFull(p)
+}
+
+func (r *rdbReader) readUint8() (uint8, error) {
+	b, err := r.readByte()
+	return uint8(b), err
+}
+
+func (r *rdbReader) readUint16() (uint16, error) {
+	b := r.buf[:2]
+	err := r.readFull(b)
+	return binary.LittleEndian.Uint16(b), err
+}
+
+func (r *rdbReader) readUint32() (uint32, error) {
+	b := r.buf[:4]
+	err := r.readFull(b)
+	return binary.LittleEndian.Uint32(b), err
+}
+
+func (r *rdbReader) readUint64() (uint64, error) {
+	b := r.buf[:8]
+	err := r.readFull(b)
+	return binary.LittleEndian.Uint64(b), err
+}
+
+func (r *rdbReader) readUint32BigEndian() (uint32, error) {
+	b := r.buf[:4]
+	err := r.readFull(b)
+	return binary.BigEndian.Uint32(b), err
+}
+
+func (r *rdbReader) readInt8() (int8, error) {
+	u, err := r.readUint8()
+	return int8(u), err
+}
+
+func (r *rdbReader) readInt16() (int16, error) {
+	u, err := r.readUint16()
+	return int16(u), err
+}
+
+func (r *rdbReader) readInt32() (int32, error) {
+	u, err := r.readUint32()
+	return int32(u), err
+}
+
+func (r *rdbReader) readInt64() (int64, error) {
+	u, err := r.readUint64()
+	return int64(u), err
+}
+
+func (r *rdbReader) readInt32BigEndian() (int32, error) {
+	u, err := r.readUint32BigEndian()
+	return int32(u), err
+}
+
+func lzfDecompress(in []byte, outlen int) (out []byte, err error) {
+	defer func() {
+		if x := recover(); x != nil {
+			err = fmt.Errorf("decompress exception: %v", x)
+		}
+	}()
+	out = make([]byte, outlen)
+	i, o := 0, 0
+	for i < len(in) {
+		ctrl := int(in[i])
+		i++
+		if ctrl < 32 {
+			for x := 0; x <= ctrl; x++ {
+				out[o] = in[i]
+				i++
+				o++
+			}
+		} else {
+			length := ctrl >> 5
+			if length == 7 {
+				length = length + int(in[i])
+				i++
+			}
+			ref := o - ((ctrl & 0x1f) << 8) - int(in[i]) - 1
+			i++
+			for x := 0; x <= length+1; x++ {
+				out[o] = out[ref]
+				ref++
+				o++
+			}
+		}
+	}
+	if o != outlen {
+		return nil, fmt.Errorf("decompress length is %d != expected %d", o, outlen)
+	}
+	return out, nil
+}
diff --git a/ledis/rdb/wandoujia-license b/Godeps/_workspace/src/github.com/siddontang/rdb/wandoujia-license
similarity index 100%
rename from ledis/rdb/wandoujia-license
rename to Godeps/_workspace/src/github.com/siddontang/rdb/wandoujia-license
diff --git a/ledis/migrate.go b/ledis/migrate.go
index b6df026..0db22b4 100644
--- a/ledis/migrate.go
+++ b/ledis/migrate.go
@@ -2,7 +2,7 @@ package ledis
 
 import (
 	"fmt"
-	"github.com/siddontang/ledisdb/ledis/rdb"
+	"github.com/siddontang/rdb"
 )
 
 /*
@@ -43,7 +43,7 @@ func (db *DB) HDump(key []byte) ([]byte, error) {
 		return nil, err
 	}
 
-	o := make(rdb.HashMap, len(v))
+	o := make(rdb.Hash, len(v))
 	for i := 0; i < len(v); i++ {
 		o[i].Field = v[i].Field
 		o[i].Value = v[i].Value
@@ -110,7 +110,7 @@ func (db *DB) Restore(key []byte, ttl int64, data []byte) error {
 				return err
 			}
 		}
-	case rdb.HashMap:
+	case rdb.Hash:
 		//first clear old key
 		if _, err = db.HClear(key); err != nil {
 			return err