diff --git a/data_utils/data.py b/data_utils/data.py
index d01ca8cc..e1fa4747 100644
--- a/data_utils/data.py
+++ b/data_utils/data.py
@@ -8,13 +8,20 @@ from __future__ import print_function
 import random
 import numpy as np
 import multiprocessing
+from threading import local
 import paddle.v2 as paddle
+import tarfile
 from data_utils import utils
 from data_utils.augmentor.augmentation import AugmentationPipeline
 from data_utils.featurizer.speech_featurizer import SpeechFeaturizer
 from data_utils.speech import SpeechSegment
 from data_utils.normalizer import FeatureNormalizer
 
+# for caching tar files info
+local_data = local()
+local_data.tar2info = {}
+local_data.tar2object = {}
+
 
 class DataGenerator(object):
     """
@@ -45,9 +52,6 @@ class DataGenerator(object):
     :types max_freq: None|float
     :param specgram_type: Specgram feature type. Options: 'linear'.
     :type specgram_type: str
-    :param use_dB_normalization: Whether to normalize the audio to -20 dB
-                                 before extracting the features.
-    :type use_dB_normalization: bool
     :param num_threads: Number of CPU threads for processing data.
     :type num_threads: int
     :param random_seed: Random seed.
@@ -64,7 +68,6 @@ class DataGenerator(object):
                  window_ms=20.0,
                  max_freq=None,
                  specgram_type='linear',
-                 use_dB_normalization=True,
                  num_threads=multiprocessing.cpu_count(),
                  random_seed=0):
         self._max_duration = max_duration
@@ -77,12 +80,15 @@ class DataGenerator(object):
             specgram_type=specgram_type,
             stride_ms=stride_ms,
             window_ms=window_ms,
-            max_freq=max_freq,
-            use_dB_normalization=use_dB_normalization)
+            max_freq=max_freq)
         self._num_threads = num_threads
         self._rng = random.Random(random_seed)
         self._epoch = 0
 
+        # for caching tar files info
+        self.tar2info = {}
+        self.tar2object = {}
+
     def batch_reader_creator(self,
                              manifest_path,
                              batch_size,
@@ -94,7 +100,7 @@ class DataGenerator(object):
         """
         Batch data reader creator for audio data. Return a callable generator
         function to produce batches of data.
-        
+
         Audio features within one batch will be padded with zeros to have the
         same shape, or a user-defined shape.
 
@@ -174,9 +180,9 @@ class DataGenerator(object):
     @property
     def feeding(self):
         """Returns data reader's feeding dict.
-        
+
         :return: Data feeding dict.
-        :rtype: dict 
+        :rtype: dict
         """
         return {"audio_spectrogram": 0, "transcript_text": 1}
 
@@ -198,9 +204,41 @@ class DataGenerator(object):
         """
         return self._speech_featurizer.vocab_list
 
+    def _parse_tar(self, file):
+        """
+        Parse a tar file to get a tarfile object and a map containing tarinfoes
+        """
+        result = {}
+        f = tarfile.open(file)
+        for tarinfo in f.getmembers():
+            result[tarinfo.name] = tarinfo
+        return f, result
+
+    def _read_soundbytes(self, filepath):
+        """
+        Read bytes from file.
+        If filepath startwith tar, we will read bytes from tar file
+        and cached tar file info for next reading request.
+        """
+        if filepath.startswith('tar:'):
+            tarpath, filename = filepath.split(':', 1)[1].split('#', 1)
+            if 'tar2info' not in local_data.__dict__:
+                local_data.tar2info = {}
+            if 'tar2object' not in local_data.__dict__:
+                local_data.tar2object = {}
+            if tarpath not in local_data.tar2info:
+                object, infoes = self._parse_tar(tarpath)
+                local_data.tar2info[tarpath] = infoes
+                local_data.tar2object[tarpath] = object
+            return local_data.tar2object[tarpath].extractfile(
+                local_data.tar2info[tarpath][filename]).read()
+        else:
+            return open(filepath).read()
+
     def _process_utterance(self, filename, transcript):
         """Load, augment, featurize and normalize for speech data."""
-        speech_segment = SpeechSegment.from_file(filename, transcript)
+        speech_segment = SpeechSegment.from_bytes(
+            self._read_soundbytes(filename), transcript)
         self._augmentation_pipeline.transform_audio(speech_segment)
         specgram, text_ids = self._speech_featurizer.featurize(speech_segment)
         specgram = self._normalizer.apply(specgram)
diff --git a/datasets/librispeech/pcloud_data.py b/datasets/librispeech/pcloud_data.py
new file mode 100644
index 00000000..91400114
--- /dev/null
+++ b/datasets/librispeech/pcloud_data.py
@@ -0,0 +1,51 @@
+import json
+import os
+import tarfile
+import sys
+import argparse
+
+parser = argparse.ArgumentParser(description=__doc__)
+parser.add_argument(
+    "--manifest_path",
+    default="/manifest.train",
+    type=str,
+    help="Manifest of target data. (default: %(default)s)")
+parser.add_argument(
+    "--out_tar_path",
+    default="/dev.tar",
+    type=str,
+    help="Output tar file path. (default: %(default)s)")
+parser.add_argument(
+    "--out_manifest_path",
+    default="/dev.mani",
+    type=str,
+    help="Manifest of output data. (default: %(default)s)")
+args = parser.parse_args()
+
+
+def gen_pcloud_data(manifest_path, out_tar_path, out_manifest_path):
+    '''
+    1. According manifest, tar sound files into out_tar_path
+    2. Generate a new manifest for output tar file
+    '''
+    out_tar = tarfile.open(out_tar_path, 'w')
+    manifest = []
+    for json_line in open(manifest_path):
+        try:
+            json_data = json.loads(json_line)
+        except Exception as e:
+            raise IOError("Error reading manifest: %s" % str(e))
+        sound_file = json_data['audio_filepath']
+        filename = os.path.basename(sound_file)
+        out_tar.add(sound_file, arcname=filename)
+        json_data['audio_filepath'] = filename
+        manifest.append("%s\n" % json.dumps(json_data))
+    with open(out_manifest_path, 'w') as out_manifest:
+        out_manifest.writelines(manifest)
+    out_manifest.close()
+    out_tar.close()
+
+
+if __name__ == '__main__':
+    gen_pcloud_data(args.manifest_path, args.out_tar_path,
+                    args.out_manifest_path)
diff --git a/pcloud_split_data.py b/pcloud_split_data.py
new file mode 100644
index 00000000..bf35383a
--- /dev/null
+++ b/pcloud_split_data.py
@@ -0,0 +1,47 @@
+import os
+import json
+import argparse
+
+
+def split_data(inManifest, tar_path, outManifest):
+    trainer_id = 1
+    trainer_count = 2
+    #with open("/trainer_id", "r") as f:
+    #    trainer_id = int(f.readline()[:-1])
+    #with open("/trainer_count", "r") as f:
+    #    trainer_count = int(f.readline()[:-1])
+
+    tarPath = os.path.abspath(tar_path)
+    result = []
+    for index, json_line in enumerate(open(inManifest)):
+        if (index % trainer_count) == trainer_id:
+            json_data = json.loads(json_line)
+            json_data['audio_filepath'] = "tar:%s#%s" % (
+                tarPath, json_data['audio_filepath'])
+            result.append("%s\n" % json.dumps(json_data))
+    with open(outManifest, 'w') as manifest:
+        manifest.writelines(result)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description=__doc__)
+
+    parser.add_argument(
+        "--in_manifest_path",
+        default='datasets/dev.mani',
+        type=str,
+        help="Input manifest path. (default: %(default)s)")
+    parser.add_argument(
+        "--data_tar_path",
+        default='datasets/dev.tar',
+        type=str,
+        help="Data tar file path. (default: %(default)s)")
+    parser.add_argument(
+        "--out_manifest_path",
+        default='datasets/dev.mani.split',
+        type=str,
+        help="Out manifest file path. (default: %(default)s)")
+    args = parser.parse_args()
+
+    split_data(args.in_manifest_path, args.data_tar_path,
+               args.out_manifest_path)
diff --git a/pcloud_submit.sh b/pcloud_submit.sh
new file mode 100644
index 00000000..06e65110
--- /dev/null
+++ b/pcloud_submit.sh
@@ -0,0 +1,13 @@
+paddlecloud submit \
+-image wanghaoshuang/pcloud_ds2 \
+-jobname ds23 \
+-cpu 1 \
+-gpu 0 \
+-memory 10Gi \
+-parallelism 1 \
+-pscpu 1 \
+-pservers 1 \
+-psmemory 10Gi \
+-passes 1 \
+-entry "sh pcloud_train.sh" \
+./deep_speech_2
diff --git a/pcloud_train.sh b/pcloud_train.sh
new file mode 100644
index 00000000..fb6cbb9e
--- /dev/null
+++ b/pcloud_train.sh
@@ -0,0 +1,32 @@
+#setted by user
+TRAIN_MANI='/pfs/dlnel/home/yanxu05@baidu.com/wanghaoshuang/data/ds2_data/demo.mani'
+#setted by user
+DEV_MANI='/pfs/dlnel/home/yanxu05@baidu.com/wanghaoshuang/data/ds2_data/demo.mani'
+#setted by user
+TRAIN_TAR='/pfs/dlnel/home/yanxu05@baidu.com/wanghaoshuang/data/ds2_data/demo.tar'
+#setted by user
+DEV_TAR='/pfs/dlnel/home/yanxu05@baidu.com/wanghaoshuang/data/ds2_data/demo.tar'
+#setted by user
+VOCAB_PATH='/pfs/dlnel/home/yanxu05@baidu.com/wanghaoshuang/data/ds2_data/eng_vocab.txt'
+#setted by user
+MEAN_STD_FILE='/pfs/dlnel/home/yanxu05@baidu.com/wanghaoshuang/data/ds2_data/mean_std.npz'
+
+# split train data for each pcloud node
+python pcloud_split_data.py \
+--in_manifest_path=$TRAIN_MANI \
+--data_tar_path=$TRAIN_TAR \
+--out_manifest_path='./train.mani'
+# split dev data for each pcloud node
+python pcloud_split_data.py \
+--in_manifest_path=$DEV_MANI \
+--data_tar_path=$DEV_TAR \
+--out_manifest_path='./dev.mani'
+
+python train.py \
+--use_gpu=0 \
+--trainer_count=4 \
+--batch_size=2 \
+--mean_std_filepath=$MEAN_STD_FILE \
+--train_manifest_path='./train.mani' \
+--dev_manifest_path='./dev.mani' \
+--vocab_filepath=$VOCAB_PATH \