diff --git a/core/engine/cluster/cluster.py b/core/engine/cluster/cluster.py
index a64e99e38b2df3033e480706bedd02eadea1dc90..385738e08b374af0c92b992aac5760aab9d54132 100644
--- a/core/engine/cluster/cluster.py
+++ b/core/engine/cluster/cluster.py
@@ -19,10 +19,16 @@ import copy
 import os
 import subprocess
 import warnings
+import sys
+import logging
 
 from paddlerec.core.engine.engine import Engine
 from paddlerec.core.factory import TrainerFactory
 from paddlerec.core.utils import envs
+import paddlerec.core.engine.cluster_utils as cluster_utils
+
+logger = logging.getLogger("root")
+logger.propagate = False
 
 
 class ClusterEngine(Engine):
@@ -47,8 +53,38 @@ class ClusterEngine(Engine):
                 self.backend))
 
     def start_worker_procs(self):
-        trainer = TrainerFactory.create(self.trainer)
-        trainer.run()
+        if (envs.get_runtime_environ("fleet_mode") == "COLLECTIVE"):
+            #trainer_ports = os.getenv("TRAINER_PORTS", None).split(",")                                            
+            cuda_visible_devices = os.getenv("CUDA_VISIBLE_DEVICES")
+            if cuda_visible_devices is None or cuda_visible_devices == "":
+                selected_gpus = range(int(os.getenv("TRAINER_GPU_CARD_COUNT")))
+            else:
+                # change selected_gpus into relative values                                                         
+                # e.g. CUDA_VISIBLE_DEVICES=4,5,6,7; args.selected_gpus=4,5,6,7;                                    
+                # therefore selected_gpus=0,1,2,3                                                                   
+                cuda_visible_devices_list = cuda_visible_devices.split(',')
+                for x in range(int(os.getenv("TRAINER_GPU_CARD_COUNT"))):
+                    assert x in cuda_visible_devices_list, "Can't find "\
+                    "your selected_gpus %s in CUDA_VISIBLE_DEVICES[%s]."\
+                    % (x, cuda_visible_devices)
+                selected_gpus = [cuda_visible_devices_list.index(x)]
+            print("selected_gpus:{}".format(selected_gpus))
+
+            factory = "paddlerec.core.factory"
+            cmd = [sys.executable, "-u", "-m", factory, self.trainer]
+            logs_dir = envs.get_runtime_environ("log_dir")
+            print("use_paddlecloud_flag:{}".format(
+                cluster_utils.use_paddlecloud()))
+            if cluster_utils.use_paddlecloud():
+                cluster, pod = cluster_utils.get_cloud_cluster(selected_gpus)
+                logger.info("get cluster from cloud:{}".format(cluster))
+                procs = cluster_utils.start_local_trainers(
+                    cluster, pod, cmd, log_dir=logs_dir)
+                print("cluster:{}".format(cluster))
+                print("pod:{}".format(pod))
+        else:
+            trainer = TrainerFactory.create(self.trainer)
+            trainer.run()
 
     def start_master_procs(self):
         if self.backend == "PADDLECLOUD":
diff --git a/core/engine/cluster_utils.py b/core/engine/cluster_utils.py
new file mode 100644
index 0000000000000000000000000000000000000000..10c11773cf78f0ded890b9d0709fe33695054aaf
--- /dev/null
+++ b/core/engine/cluster_utils.py
@@ -0,0 +1,324 @@
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import functools
+import logging
+import socket
+import time
+import os
+import signal
+import copy
+import sys
+import subprocess
+from contextlib import closing
+import socket
+
+logger = logging.getLogger("root")
+logger.propagate = False
+
+
+class Cluster(object):
+    def __init__(self, hdfs):
+        self.job_server = None
+        self.pods = []
+        self.hdfs = None
+        self.job_stage_flag = None
+
+    def __str__(self):
+        return "job_server:{} pods:{} job_stage_flag:{} hdfs:{}".format(
+            self.job_server, [str(pod) for pod in self.pods],
+            self.job_stage_flag, self.hdfs)
+
+    def __eq__(self, cluster):
+        if len(self.pods) != len(cluster.pods):
+            return False
+
+        for a, b in zip(self.pods, cluster.pods):
+            if a != b:
+                return False
+
+        if self.job_stage_flag != cluster.job_stage_flag:
+            return False
+
+        return True
+
+    def __ne__(self, cluster):
+        return not self.__eq__(cluster)
+
+    def update_pods(cluster):
+        self.pods = copy.copy(cluster.pods)
+
+    def trainers_nranks(self):
+        return len(self.trainers_endpoints())
+
+    def pods_nranks(self):
+        return len(self.pods)
+
+    def trainers_endpoints(self):
+        r = []
+        for pod in self.pods:
+            for t in pod.trainers:
+                r.append(t.endpoint)
+        return r
+
+    def pods_endpoints(self):
+        r = []
+        for pod in self.pods:
+            ep = "{}:{}".format(pod.addr, pod.port)
+            assert pod.port != None and pod.addr != None, "{} not a valid endpoint".format(
+                ep)
+            r.append(ep)
+
+        return r
+
+    def get_pod_by_id(self, pod_id):
+        for pod in self.pods:
+            if str(pod_id) == str(pod.id):
+                return pod
+
+        return None
+
+
+class JobServer(object):
+    def __init__(self):
+        self.endpoint = None
+
+    def __str__(self):
+        return "{}".format(self.endpoint)
+
+    def __eq__(self, j):
+        return self.endpint == j.endpoint
+
+    def __ne__(self, j):
+        return not self == j
+
+
+class Trainer(object):
+    def __init__(self):
+        self.gpus = []
+        self.endpoint = None
+        self.rank = None
+
+    def __str__(self):
+        return "gpu:{} endpoint:{} rank:{}".format(self.gpus, self.endpoint,
+                                                   self.rank)
+
+    def __eq__(self, t):
+        if len(self.gpus) != len(t.gpus):
+            return False
+
+        if self.endpoint != t.endpoint or \
+                self.rank != t.rank:
+            return False
+
+        for a, b in zip(self.gpus, t.gpus):
+            if a != b:
+                return False
+
+        return True
+
+    def __ne__(self, t):
+        return not self == t
+
+    def rank(self):
+        return self.rank
+
+
+class Pod(object):
+    def __init__(self):
+        self.rank = None
+        self.id = None
+        self.addr = None
+        self.port = None
+        self.trainers = []
+        self.gpus = []
+
+    def __str__(self):
+        return "rank:{} id:{} addr:{} port:{} visible_gpu:{} trainers:{}".format(
+            self.rank, self.id, self.addr, self.port, self.gpus,
+            [str(t) for t in self.trainers])
+
+    def __eq__(self, pod):
+        if self.rank != pod.rank or \
+                self.id != pod.id or \
+                self.addr != pod.addr or \
+                self.port != pod.port:
+            logger.debug("pod {} != pod".format(self, pod))
+            return False
+
+        if len(self.trainers) != len(pod.trainers):
+            logger.debug("trainers {} != {}".format(self.trainers,
+                                                    pod.trainers))
+            return False
+
+        for i in range(len(self.trainers)):
+            if self.trainers[i] != pod.trainers[i]:
+                logger.debug("trainer {} != {}".format(self.trainers[i],
+                                                       pod.trainers[i]))
+                return False
+
+        return True
+
+    def __ne__(self, pod):
+        return not self == pod
+
+    def parse_response(self, res_pods):
+        pass
+
+    def rank(self):
+        return self.rank
+
+    def get_visible_gpus(self):
+        r = ""
+        for g in self.gpus:
+            r += "{},".format(g)
+
+        assert r != "", "this pod {} can't see any gpus".format(self)
+
+        r = r[:-1]
+        return r
+
+
+def get_cluster(node_ips, node_ip, paddle_ports, selected_gpus):
+    assert type(paddle_ports) is list, "paddle_ports must be list"
+    cluster = Cluster(hdfs=None)
+    trainer_rank = 0
+    for node_rank, ip in enumerate(node_ips):
+        pod = Pod()
+        pod.rank = node_rank
+        pod.addr = ip
+        for i in range(len(selected_gpus)):
+            trainer = Trainer()
+            trainer.gpus.append(selected_gpus[i])
+            trainer.endpoint = "%s:%d" % (ip, paddle_ports[i])
+            trainer.rank = trainer_rank
+            trainer_rank += 1
+
+            pod.trainers.append(trainer)
+        cluster.pods.append(pod)
+
+    pod_rank = node_ips.index(node_ip)
+    return cluster, cluster.pods[pod_rank]
+
+
+def get_cloud_cluster(selected_gpus, args_port=None):
+    #you can automatically get ip info while using paddlecloud multi nodes mode.
+    node_ips = os.getenv("PADDLE_TRAINERS")
+    assert node_ips is not None, "PADDLE_TRAINERS should not be None"
+    print("node_ips:{}".format(node_ips))
+    node_ip = os.getenv("POD_IP")
+    assert node_ip is not None, "POD_IP should not be None"
+    print("node_ip:{}".format(node_ip))
+    node_rank = os.getenv("PADDLE_TRAINER_ID")
+    assert node_rank is not None, "PADDLE_TRAINER_ID should not be None"
+    print("node_rank:{}".format(node_rank))
+    node_ips = node_ips.split(",")
+    num_nodes = len(node_ips)
+    node_rank = int(node_rank)
+
+    started_port = args_port
+    print("num_nodes:", num_nodes)
+    if num_nodes > 1:
+        try:
+            paddle_port = int(os.getenv("PADDLE_PORT", ""))
+            paddle_port_num = int(os.getenv("TRAINER_PORTS_NUM", ""))
+
+            if paddle_port_num >= len(
+                    selected_gpus) and paddle_port != args_port:
+                logger.warning("Use Cloud specified port:{}.".format(
+                    paddle_port))
+                started_port = paddle_port
+
+        except Exception as e:
+            print(e)
+            pass
+
+    if started_port is None:
+        started_port = 6170
+
+    logger.debug("parsed from args:node_ips:{} \
+        node_ip:{} node_rank:{} started_port:{}"
+                 .format(node_ips, node_ip, node_rank, started_port))
+
+    ports = [x for x in range(started_port, started_port + len(selected_gpus))]
+    cluster, pod = get_cluster(node_ips, node_ip, ports, selected_gpus)
+    return cluster, cluster.pods[node_rank]
+
+
+def use_paddlecloud():
+    node_ips = os.getenv("PADDLE_TRAINERS", None)
+    node_ip = os.getenv("POD_IP", None)
+    node_rank = os.getenv("PADDLE_TRAINER_ID", None)
+    if node_ips is None or node_ip is None or node_rank is None:
+        return False
+    else:
+        return True
+
+
+class TrainerProc(object):
+    def __init__(self):
+        self.proc = None
+        self.log_fn = None
+        self.log_offset = None
+        self.rank = None
+        self.local_rank = None
+        self.cmd = None
+
+
+def start_local_trainers(cluster, pod, cmd, log_dir=None):
+    current_env = copy.copy(os.environ.copy())
+    #paddle broadcast ncclUniqueId use socket, and
+    #proxy maybe make trainers unreachable, so delete them.
+    #if we set them to "", grpc will log error message "bad uri"
+    #so just delete them.
+    current_env.pop("http_proxy", None)
+    current_env.pop("https_proxy", None)
+
+    procs = []
+    for idx, t in enumerate(pod.trainers):
+        proc_env = {
+            "FLAGS_selected_gpus": "%s" % ",".join([str(g) for g in t.gpus]),
+            "PADDLE_TRAINER_ID": "%d" % t.rank,
+            "PADDLE_CURRENT_ENDPOINT": "%s" % t.endpoint,
+            "PADDLE_TRAINERS_NUM": "%d" % cluster.trainers_nranks(),
+            "PADDLE_TRAINER_ENDPOINTS": ",".join(cluster.trainers_endpoints())
+        }
+
+        current_env.update(proc_env)
+
+        logger.debug("trainer proc env:{}".format(current_env))
+
+        # cmd = [sys.executable, "-u", training_script]
+
+        logger.info("start trainer proc:{} env:{}".format(cmd, proc_env))
+
+        fn = None
+        if log_dir is not None:
+            os.system("mkdir -p {}".format(log_dir))
+            fn = open("%s/workerlog.%d" % (log_dir, idx), "a")
+            proc = subprocess.Popen(cmd, env=current_env, stdout=fn, stderr=fn)
+        else:
+            proc = subprocess.Popen(cmd, env=current_env)
+
+        tp = TrainerProc()
+        tp.proc = proc
+        tp.rank = t.rank
+        tp.local_rank = idx
+        tp.log_fn = fn
+        tp.log_offset = fn.tell() if fn else None
+        tp.cmd = cmd
+
+        procs.append(proc)
+
+    return procs
diff --git a/core/engine/local_cluster.py b/core/engine/local_cluster.py
index 88f21ef8bf7218a4b83db265ad534ad2266561a9..b6ff736eefc107305649bf3c9b9b5cb831f0fcb5 100755
--- a/core/engine/local_cluster.py
+++ b/core/engine/local_cluster.py
@@ -19,9 +19,14 @@ import copy
 import os
 import sys
 import subprocess
+import logging
 
 from paddlerec.core.engine.engine import Engine
 from paddlerec.core.utils import envs
+import paddlerec.core.engine.cluster_utils as cluster_utils
+
+logger = logging.getLogger("root")
+logger.propagate = False
 
 
 class LocalClusterEngine(Engine):
@@ -97,42 +102,70 @@ class LocalClusterEngine(Engine):
                     stderr=fn,
                     cwd=os.getcwd())
                 procs.append(proc)
+
         elif fleet_mode.upper() == "COLLECTIVE":
-            selected_gpus = self.envs["selected_gpus"].split(",")
+            cuda_visible_devices = os.getenv("CUDA_VISIBLE_DEVICES")
+            if cuda_visible_devices is None or cuda_visible_devices == "":
+                selected_gpus = [
+                    x.strip() for x in self.envs["selected_gpus"].split(",")
+                ]
+            else:
+                # change selected_gpus into relative values
+                # e.g. CUDA_VISIBLE_DEVICES=4,5,6,7; args.selected_gpus=4,5,6,7;
+                # therefore selected_gpus=0,1,2,3
+                cuda_visible_devices_list = cuda_visible_devices.split(',')
+                for x in self.envs["selected_gpus"].split(","):
+                    assert x in cuda_visible_devices_list, "Can't find "\
+                    "your selected_gpus %s in CUDA_VISIBLE_DEVICES[%s]."\
+                    % (x, cuda_visible_devices)
+                selected_gpus = [
+                    cuda_visible_devices_list.index(x.strip())
+                    for x in self.envs["selected_gpus"].split(",")
+                ]
             selected_gpus_num = len(selected_gpus)
 
-            for i in range(selected_gpus_num - 1):
-                while True:
-                    new_port = envs.find_free_port()
-                    if new_port not in ports:
-                        ports.append(new_port)
-                        break
-            user_endpoints = ",".join(["127.0.0.1:" + str(x) for x in ports])
-
             factory = "paddlerec.core.factory"
             cmd = [sys.executable, "-u", "-m", factory, self.trainer]
 
-            for i in range(selected_gpus_num):
-                current_env.update({
-                    "PADDLE_TRAINER_ENDPOINTS": user_endpoints,
-                    "PADDLE_CURRENT_ENDPOINTS": user_endpoints[i],
-                    "PADDLE_TRAINERS_NUM": str(worker_num),
-                    "TRAINING_ROLE": "TRAINER",
-                    "PADDLE_TRAINER_ID": str(i),
-                    "FLAGS_selected_gpus": str(selected_gpus[i]),
-                    "PADDLEREC_GPU_NUMS": str(selected_gpus_num)
-                })
-
-                os.system("mkdir -p {}".format(logs_dir))
-                fn = open("%s/worker.%d" % (logs_dir, i), "w")
-                log_fns.append(fn)
-                proc = subprocess.Popen(
-                    cmd,
-                    env=current_env,
-                    stdout=fn,
-                    stderr=fn,
-                    cwd=os.getcwd())
-                procs.append(proc)
+            print("use_paddlecloud_flag:{}".format(
+                cluster_utils.use_paddlecloud()))
+            if cluster_utils.use_paddlecloud():
+                cluster, pod = cluster_utils.get_cloud_cluster(selected_gpus)
+                logger.info("get cluster from cloud:{}".format(cluster))
+                procs = cluster_utils.start_local_trainers(
+                    cluster, pod, cmd, log_dir=logs_dir)
+
+            else:
+                # trainers_num = 1 or not use paddlecloud ips="a,b"
+                for i in range(selected_gpus_num - 1):
+                    while True:
+                        new_port = envs.find_free_port()
+                        if new_port not in ports:
+                            ports.append(new_port)
+                            break
+                user_endpoints = ",".join(
+                    ["127.0.0.1:" + str(x) for x in ports])
+                for i in range(selected_gpus_num):
+                    current_env.update({
+                        "PADDLE_TRAINER_ENDPOINTS": user_endpoints,
+                        "PADDLE_CURRENT_ENDPOINTS": user_endpoints[i],
+                        "PADDLE_TRAINERS_NUM": str(worker_num),
+                        "TRAINING_ROLE": "TRAINER",
+                        "PADDLE_TRAINER_ID": str(i),
+                        "FLAGS_selected_gpus": str(selected_gpus[i]),
+                        "PADDLEREC_GPU_NUMS": str(selected_gpus_num)
+                    })
+
+                    os.system("mkdir -p {}".format(logs_dir))
+                    fn = open("%s/worker.%d" % (logs_dir, i), "w")
+                    log_fns.append(fn)
+                    proc = subprocess.Popen(
+                        cmd,
+                        env=current_env,
+                        stdout=fn,
+                        stderr=fn,
+                        cwd=os.getcwd())
+                    procs.append(proc)
 
         # only wait worker to finish here
         for i, proc in enumerate(procs):
diff --git a/core/trainers/framework/runner.py b/core/trainers/framework/runner.py
index 839e3ed4d6e04b13f69e6c2cfc463e83aef130f7..9064989ad467d3104adf50d64300b7903376e7ce 100644
--- a/core/trainers/framework/runner.py
+++ b/core/trainers/framework/runner.py
@@ -209,9 +209,13 @@ class RunnerBase(object):
 
                     if save_step_interval >= 1 and batch_id % save_step_interval == 0 and context[
                             "is_infer"] == False:
-                        if context["fleet_mode"].upper() == "PS":
-                            train_prog = context["model"][model_dict["name"]][
-                                "main_program"]
+                        if context["is_fleet"]:
+                            if context["fleet_mode"].upper() == "PS":
+                                train_prog = context["model"][model_dict[
+                                    "name"]]["main_program"]
+                            else:
+                                train_prog = context["model"][model_dict[
+                                    "name"]]["default_main_program"]
                         else:
                             train_prog = context["model"][model_dict["name"]][
                                 "default_main_program"]
diff --git a/doc/custom_reader.md b/doc/custom_reader.md
new file mode 100644
index 0000000000000000000000000000000000000000..c392a5ea53c0da59492956a7c64cd13627dcb36a
--- /dev/null
+++ b/doc/custom_reader.md
@@ -0,0 +1,309 @@
+# PaddleRec 自定义数据集及Reader
+
+用户自定义数据集及配置异步Reader，需要关注以下几个步骤：
+
+* [数据集整理](#数据集整理)
+* [在模型组网中加入输入占位符](#在模型组网中加入输入占位符)
+* [Reader实现](#Reader的实现)
+* [在yaml文件中配置Reader](#在yaml文件中配置reader)
+
+我们以CTR-DNN模型为例，给出了从数据整理，变量定义，Reader写法，调试的完整历程。
+
+* [数据及Reader示例-DNN](#数据及Reader示例-DNN)
+
+
+## 数据集整理
+
+PaddleRec支持模型自定义数据集。
+
+关于数据的tips：
+1. 数据量：
+
+    PaddleRec面向大规模数据设计，可以轻松支持亿级的数据读取，工业级的数据读写api：`dataset`在搜索、推荐、信息流等业务得到了充分打磨。
+2. 文件类型:
+
+    支持任意直接可读的文本数据，`dataset`同时支持`.gz`格式的文本压缩数据，无需额外代码，可直接读取。数据样本应以`\n`为标志，按行组织。
+
+3. 文件存放位置：
+
+    文件通常存放在训练节点本地，但同时，`dataset`支持使用`hadoop`远程读取数据，数据无需下载到本地，为dataset配置hadoop相关账户及地址即可。
+4. 数据类型
+
+    Reader处理的是以行为单位的`string`数据，喂入网络的数据需要转为`int`,`float`的数值数据，不支持`string`喂入网络，不建议明文保存及处理训练数据。
+5. Tips
+
+    Dataset模式下，训练线程与数据读取线程的关系强相关，为了多线程充分利用，`强烈建议将文件合理的拆为多个小文件`，尤其是在分布式训练场景下，可以均衡各个节点的数据量，同时加快数据的下载速度。
+
+## 在模型组网中加入输入占位符
+
+Reader读取文件后，产出的数据喂入网络，需要有占位符进行接收。占位符在Paddle中使用`fluid.data`或`fluid.layers.data`进行定义。`data`的定义可以参考[fluid.data](https://www.paddlepaddle.org.cn/documentation/docs/zh/api_cn/fluid_cn/data_cn.html#data)以及[fluid.layers.data](https://www.paddlepaddle.org.cn/documentation/docs/zh/api_cn/layers_cn/data_cn.html#data)。
+
+加入您希望输入三个数据，分别是维度32的数据A，维度变长的稀疏数据B，以及一个一维的标签数据C，并希望梯度可以经过该变量向前传递，则示例如下：
+
+数据A的定义：
+```python
+var_a = fluid.data(name='A', shape= [-1, 32], dtype='float32')
+```
+
+数据B的定义，变长数据的使用可以参考[LoDTensor](https://www.paddlepaddle.org.cn/documentation/docs/zh/beginners_guide/basic_concept/lod_tensor.html#cn-user-guide-lod-tensor)：
+```python
+var_b = fluid.data(name='B', shape=[-1, 1], lod_level=1, dtype='int64')
+```
+
+数据C的定义：
+```python
+var_c = fluid.data(name='C', shape=[-1, 1], dtype='int32')
+var_c.stop_gradient = False
+```
+
+当我们完成以上三个数据的定义后，在PaddleRec的模型定义中，还需将其加入model基类成员变量`self._data_var`
+
+```python
+self._data_var.append(var_a)
+self._data_var.append(var_b)
+self._data_var.append(var_c)
+```
+至此，我们完成了在组网中定义输入数据的工作。
+
+## Reader的实现
+
+### Reader的实现范式
+
+Reader的逻辑需要一个单独的python文件进行描述。我们试写一个`test_reader.py`，实现的具体流程如下：
+1. 首先我们需要引入Reader基类
+
+    ```python
+    from paddlerec.core.reader import ReaderBase
+    ```
+2. 创建一个子类，继承Reader的基类，训练所需Reader命名为`TrainerReader`
+    ```python
+    class Reader(ReaderBase):
+        def init(self):
+            pass
+
+        def generator_sample(self, line):
+            pass
+    ```
+
+3. 在`init(self)`函数中声明一些在数据读取中会用到的变量，必要时可以在`config.yaml`文件中配置变量，利用`env.get_global_env()`拿到。
+   
+    比如，我们希望从yaml文件中读取一个数据预处理变量`avg=10`，目的是将数据A的数据缩小10倍，可以这样实现：
+
+    首先更改yaml文件，在某个hyper_parameters下加入该变量
+
+    ```yaml
+    ...
+    hyper_parameters:
+        reader:
+            avg: 10
+    ...
+    ```
+
+
+    再更改Reader的init函数
+
+    ```python
+    from paddlerec.core.utils import envs
+    class Reader(ReaderBase):
+        def init(self):
+            self.avg = envs.get_global_env("avg", None, "hyper_parameters.reader")
+
+        def generator_sample(self, line):
+            pass
+    ```
+
+4. 继承并实现基类中的`generate_sample(self, line)`函数，逐行读取数据。
+   - 该函数应返回一个可以迭代的reader方法(带有yield的函数不再是一个普通的函数，而是一个生成器generator，成为了可以迭代的对象，等价于一个数组、链表、文件、字符串etc.)
+   - 在这个可以迭代的函数中，如示例代码中的`def reader()`，我们定义数据读取的逻辑。以行为单位的数据进行截取，转换及预处理。
+   - 最后，我们需要将数据整理为特定的格式，才能够被PaddleRec的Reader正确读取，并灌入的训练的网络中。简单来说，数据的输出顺序与我们在网络中创建的`inputs`必须是严格一一对应的，并转换为类似字典的形式。
+    
+    示例： 假设数据ABC在文本数据中，每行以这样的形式存储：
+    ```shell
+    0.1,0.2,0.3...3.0,3.1,3.2 \t 99999,99998,99997 \t 1 \n
+    ```
+
+    则示例代码如下：
+    ```python
+    from paddlerec.core.utils import envs
+    class Reader(ReaderBase):
+        def init(self):
+            self.avg = envs.get_global_env("avg", None, "hyper_parameters.reader")
+
+        def generator_sample(self, line):
+            
+            def reader(self, line):
+                # 先分割 '\n'， 再以 '\t'为标志分割为list
+                variables = (line.strip('\n')).split('\t')
+
+                # A是第一个元素，并且每个数据之间使用','分割
+                var_a = variables[0].split(',') # list
+                var_a = [float(i) / self.avg for i in var_a] # 将str数据转换为float
+                
+
+                # B是第二个元素，同样以 ',' 分割
+                var_b = variables[1].split(',') # list
+                var_b = [int(i) for i in var_b] # 将str数据转换为int
+
+                # C是第三个元素, 只有一个元素，没有分割符
+                var_c = variables[2]
+                var_c = int(var_c) # 将str数据转换为int
+                var_c = [var_c] # 将单独的数据元素置入list中
+
+                # 将数据与数据名结合，组织为dict的形式
+                # 如下，output形式为{ A: var_a, B: var_b, C: var_c}
+                variable_name = ['A', 'B', 'C']
+                output = zip(variable_name, [var_a] + [var_b] + [var_c])
+
+                # 将数据输出，使用yield方法，将该函数变为了一个可迭代的对象
+                yield output
+
+    ```
+    
+    至此，我们完成了Reader的实现。
+
+
+### 在yaml文件中配置Reader
+
+在模型的yaml配置文件中，主要的修改是三个，如下
+
+```yaml
+reader:
+    batch_size: 2
+    class: "{workspace}/criteo_reader.py"
+    train_data_path: "{workspace}/data/train_data"
+```
+
+batch_size: 顾名思义，是小批量训练时的样本大小
+class: 运行改模型所需reader的路径
+train_data_path: 训练数据所在文件夹
+reader_debug_mode: 测试reader语法，及输出是否符合预期的debug模式的开关
+
+
+## 数据及Reader示例-DNN
+
+
+### Criteo数据集格式
+
+CTR-DNN训练及测试数据集选用[Display Advertising Challenge](https://www.kaggle.com/c/criteo-display-ad-challenge/)所用的Criteo数据集。该数据集包括两部分：训练集和测试集。训练集包含一段时间内Criteo的部分流量，测试集则对应训练数据后一天的广告点击流量。
+每一行数据格式如下所示：
+```bash
+<label> <integer feature 1> ... <integer feature 13> <categorical feature 1> ... <categorical feature 26>
+```
+其中```<label>```表示广告是否被点击，点击用1表示，未点击用0表示。```<integer feature>```代表数值特征（连续特征），共有13个连续特征。```<categorical feature>```代表分类特征（离散特征），共有26个离散特征。相邻两个特征用```\t```分隔，缺失特征用空格表示。测试集中```<label>```特征已被移除。
+
+### Criteo数据集的预处理
+
+数据预处理共包括两步：
+- 将原始训练集按9:1划分为训练集和验证集
+- 数值特征（连续特征）需进行归一化处理，但需要注意的是，对每一个特征```<integer feature i>```，归一化时用到的最大值并不是用全局最大值，而是取排序后95%位置处的特征值作为最大值，同时保留极值。
+
+### CTR网络输入的定义
+
+正如前所述，Criteo数据集中，分为连续数据与离散（稀疏）数据，所以整体而言，CTR-DNN模型的数据输入层包括三个，分别是：`dense_input`用于输入连续数据，维度由超参数`dense_feature_dim`指定，数据类型是归一化后的浮点型数据。`sparse_input_ids`用于记录离散数据，在Criteo数据集中，共有26个slot，所以我们创建了名为`C1~C26`的26个稀疏参数输入，并设置`lod_level=1`，代表其为变长数据，数据类型为整数；最后是每条样本的`label`，代表了是否被点击，数据类型是整数，0代表负样例，1代表正样例。
+
+在Paddle中数据输入的声明使用`paddle.fluid.layers.data()`，会创建指定类型的占位符，数据IO会依据此定义进行数据的输入。
+
+稀疏参数输入的定义:
+```python
+def sparse_inputs():
+    ids = envs.get_global_env("hyper_parameters.sparse_inputs_slots", None)
+
+    sparse_input_ids = [
+        fluid.layers.data(name="S" + str(i),
+                            shape=[1],
+                            lod_level=1,
+                            dtype="int64") for i in range(1, ids)
+    ]
+    return sparse_input_ids
+```
+
+稠密参数输入的定义：
+```python
+def dense_input():
+    dim = envs.get_global_env("hyper_parameters.dense_input_dim", None)
+
+    dense_input_var = fluid.layers.data(name="D",
+                                        shape=[dim],
+                                        dtype="float32")
+    return dense_input_var
+```
+
+标签的定义：
+```python
+def label_input():
+    label = fluid.layers.data(name="click", shape=[1], dtype="int64")
+    return label
+```
+
+组合起来，正确的声明他们：
+```python
+self.sparse_inputs = sparse_inputs()
+self.dense_input = dense_input()
+self.label_input = label_input()
+
+self._data_var.append(self.dense_input)
+
+for input in self.sparse_inputs:
+    self._data_var.append(input)
+
+self._data_var.append(self.label_input)
+
+```
+
+
+### Criteo Reader写法
+
+```python
+# 引入PaddleRec的Reader基类
+from paddlerec.core.reader import ReaderBase
+# 引入PaddleRec的读取yaml配置文件的方法
+from paddlerec.core.utils import envs
+
+# 定义TrainReader，需要继承 paddlerec.core.reader.Reader
+class Reader(ReaderBase):
+
+    # 数据预处理逻辑，继承自基类
+    # 如果无需处理， 使用pass跳过该函数的执行
+    def init(self):
+        self.cont_min_ = [0, -3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+        self.cont_max_ = [20, 600, 100, 50, 64000, 500, 100, 50, 500, 10, 10, 10, 50]
+        self.cont_diff_ = [20, 603, 100, 50, 64000, 500, 100, 50, 500, 10, 10, 10, 50]
+        self.hash_dim_ = envs.get_global_env("hyper_parameters.sparse_feature_number", None)
+        self.continuous_range_ = range(1, 14)
+        self.categorical_range_ = range(14, 40)
+
+    # 读取数据方法，继承自基类
+    # 实现可以迭代的reader函数，逐行处理数据
+    def generate_sample(self, line):
+        """
+        Read the data line by line and process it as a dictionary
+        """
+
+        def reader():
+            """
+            This function needs to be implemented by the user, based on data format
+            """
+            features = line.rstrip('\n').split('\t')
+
+            dense_feature = []
+            sparse_feature = []
+            for idx in self.continuous_range_:
+                if features[idx] == "":
+                    dense_feature.append(0.0)
+                else:
+                    dense_feature.append(
+                        (float(features[idx]) - self.cont_min_[idx - 1]) /
+                        self.cont_diff_[idx - 1])
+
+            for idx in self.categorical_range_:
+                sparse_feature.append(
+                    [hash(str(idx) + features[idx]) % self.hash_dim_])
+            label = [int(features[0])]
+            feature_name = ["D"]
+            for idx in self.categorical_range_:
+                feature_name.append("S" + str(idx - 13))
+            feature_name.append("label")
+            yield zip(feature_name, [dense_feature] + sparse_feature + [label])
+
+        return reader
+```
diff --git a/models/multitask/mmoe/config.yaml b/models/multitask/mmoe/config.yaml
index 354bd218a9e63eeaa7657b2d77c94d9507a3e8bc..18f9a18256fb9d8785789d42be06b4748e721022 100644
--- a/models/multitask/mmoe/config.yaml
+++ b/models/multitask/mmoe/config.yaml
@@ -49,10 +49,12 @@ runner:
   save_checkpoint_path: "increment"
   save_inference_path: "inference"
   print_interval: 1
+  phases: [train]
 - name: infer_runner
   class: infer
   init_model_path: "increment/1"
   device: cpu
+  phases: [infer]
 
 phase:
 - name: train
diff --git a/models/rank/dnn/README.md b/models/rank/dnn/README.md
index d4167777220a12fc3d59c87a01cdf8dcac7dae4d..9b5c14eff3f38b2f2421c89ad6154f1df2aca166 100644
--- a/models/rank/dnn/README.md
+++ b/models/rank/dnn/README.md
@@ -30,13 +30,12 @@
 
 ### 一键下载训练及测试数据
 ```bash
-sh download_data.sh
+sh run.sh
 ```
-执行该脚本，会从国内源的服务器上下载Criteo数据集，并解压到指定文件夹。全量训练数据放置于`./train_data_full/`，全量测试数据放置于`./test_data_full/`，用于快速验证的训练数据与测试数据放置于`./train_data/`与`./test_data/`。
+进入models/rank/dnn/data目录下，执行该脚本，会从国内源的服务器上下载Criteo数据集，并解压到指定文件夹。原始的全量数据放置于`./train_data_full/`，原始的全量测试数据放置于`./test_data_full/`，原始的用于快速验证的训练数据与测试数据放置于`./train_data/`与`./test_data/`。处理后的全量训练数据放置于`./slot_train_data_full/`，处理后的全量测试数据放置于`./slot_test_data_full/`，处理后的用于快速验证的训练数据与测试数据放置于`./slot_train_data/`与`./slot_test_data/`。
 
 执行该脚本的理想输出为：
 ```bash
-> sh download_data.sh
 --2019-11-26 06:31:33--  https://fleet.bj.bcebos.com/ctr_data.tar.gz
 Resolving fleet.bj.bcebos.com... 10.180.112.31
 Connecting to fleet.bj.bcebos.com|10.180.112.31|:443... connected.
@@ -100,7 +99,7 @@ def get_dataset(inputs, args)
 3. 创建一个子类，继承dataset的基类，基类有多种选择，如果是多种数据类型混合，并且需要转化为数值进行预处理的，建议使用`MultiSlotDataGenerator`；若已经完成了预处理并保存为数据文件，可以直接以`string`的方式进行读取，使用`MultiSlotStringDataGenerator`，能够进一步加速。在示例代码，我们继承并实现了名为`CriteoDataset`的dataset子类，使用`MultiSlotDataGenerator`方法。
 4. 继承并实现基类中的`generate_sample`函数，逐行读取数据。该函数应返回一个可以迭代的reader方法(带有yield的函数不再是一个普通的函数，而是一个生成器generator，成为了可以迭代的对象，等价于一个数组、链表、文件、字符串etc.)
 5. 在这个可以迭代的函数中，如示例代码中的`def reader()`，我们定义数据读取的逻辑。例如对以行为单位的数据进行截取，转换及预处理。
-6. 最后，我们需要将数据整理为特定的格式，才能够被dataset正确读取，并灌入的训练的网络中。简单来说，数据的输出顺序与我们在网络中创建的`inputs`必须是严格一一对应的，并转换为类似字典的形式。在示例代码中，我们使用`zip`的方法将参数名与数值构成的元组组成了一个list，并将其yield输出。如果展开来看，我们输出的数据形如`[('dense_feature',[value]),('C1',[value]),('C2',[value]),...,('C26',[value]),('label',[value])]`
+6. 最后，我们需要将数据整理为特定的格式，才能够被dataset正确读取，并灌入的训练的网络中。简单来说，数据的输出顺序与我们在网络中创建的`inputs`必须是严格一一对应的。在示例代码中，我们将数据整理成`click:value dense_feature:value ... dense_feature:value 1:value ... 26:value`的格式。用print输出是因为我们在run.sh中将结果重定向到slot_train_data等文件中，由模型直接读取。在用户自定义使用时，可以使用`zip`的方法将参数名与数值构成的元组组成了一个list，并将其yield输出，并在config.yaml中的data_converter参数指定reader的路径。
 
 
 ```python
@@ -113,11 +112,22 @@ hash_dim_ = 1000001
 continuous_range_ = range(1, 14)
 categorical_range_ = range(14, 40)
 
+
 class CriteoDataset(dg.MultiSlotDataGenerator):
-   
+    """
+    DacDataset: inheritance MultiSlotDataGeneratior, Implement data reading
+    Help document: http://wiki.baidu.com/pages/viewpage.action?pageId=728820675
+    """
+
     def generate_sample(self, line):
-        
+        """
+        Read the data line by line and process it as a dictionary
+        """
+
         def reader():
+            """
+            This function needs to be implemented by the user, based on data format
+            """
             features = line.rstrip('\n').split('\t')
             dense_feature = []
             sparse_feature = []
@@ -137,11 +147,16 @@ class CriteoDataset(dg.MultiSlotDataGenerator):
             for idx in categorical_range_:
                 feature_name.append("C" + str(idx - 13))
             feature_name.append("label")
-
-            yield zip(feature_name, [dense_feature] + sparse_feature + [label])
+            s = "click:" + str(label[0])
+            for i in dense_feature:
+                s += " dense_feature:" + str(i)
+            for i in range(1, 1 + len(categorical_range_)):
+                s += " " + str(i) + ":" + str(sparse_feature[i - 1][0])
+            print(s.strip()) # add print for data preprocessing
 
         return reader
 
+
 d = CriteoDataset()
 d.run_from_stdin()
 ```
@@ -149,117 +164,124 @@ d.run_from_stdin()
 我们可以脱离组网架构，单独验证Dataset的输出是否符合我们预期。使用命令
 `cat 数据文件 | python dataset读取python文件`进行dataset代码的调试：
 ```bash
-cat train_data/part-0 | python dataset_generator.py
+cat train_data/part-0 | python get_slot_data.py
 ```
 输出的数据格式如下：
-` dense_input:size ; dense_input:value ; sparse_input:size ; sparse_input:value ; ... ; sparse_input:size ; sparse_input:value ; label:size ; label:value `
+`label:value dense_input:value ... dense_input:value sparse_input:value ... sparse_input:value `
 
 理想的输出为(截取了一个片段)：
 ```bash
 ...
-13 0.05 0.00663349917081 0.05 0.0 0.02159375 0.008 0.15 0.04 0.362 0.1 0.2 0.0 0.04 1 715353 1 817085 1 851010 1 833725 1 286835 1 948614 1 881652 1 507110 1 27346 1 646986 1 643076 1 200960 1 18464 1 202774 1 532679 1 729573 1 342789 1 562805 1 880474 1 984402 1 666449 1 26235 1 700326 1 452909 1 884722 1 787527 1 0
+click:0 dense_feature:0.05 dense_feature:0.00663349917081 dense_feature:0.05 dense_feature:0.0 dense_feature:0.02159375 dense_feature:0.008 dense_feature:0.15 dense_feature:0.04 dense_feature:0.362 dense_feature:0.1 dense_feature:0.2 dense_feature:0.0 dense_feature:0.04 1:715353 2:817085 3:851010 4:833725 5:286835 6:948614 7:881652 8:507110 9:27346 10:646986 11:643076 12:200960 13:18464 14:202774 15:532679 16:729573 17:342789 18:562805 19:880474 20:984402 21:666449 22:26235 23:700326 24:452909 25:884722 26:787527
 ...
 ```
 
 #
 ## 模型组网
 ### 数据输入声明
-正如数据准备章节所介绍，Criteo数据集中，分为连续数据与离散（稀疏）数据，所以整体而言，CTR-DNN模型的数据输入层包括三个，分别是：`dense_input`用于输入连续数据，维度由超参数`dense_feature_dim`指定，数据类型是归一化后的浮点型数据。`sparse_input_ids`用于记录离散数据，在Criteo数据集中，共有26个slot，所以我们创建了名为`C1~C26`的26个稀疏参数输入，并设置`lod_level=1`，代表其为变长数据，数据类型为整数；最后是每条样本的`label`，代表了是否被点击，数据类型是整数，0代表负样例，1代表正样例。
-
-在Paddle中数据输入的声明使用`paddle.fluid.data()`，会创建指定类型的占位符，数据IO会依据此定义进行数据的输入。
-```python
-dense_input = fluid.data(name="dense_input",
-                                 shape=[-1, args.dense_feature_dim],
-                                 dtype="float32")
-
-sparse_input_ids = [
-    fluid.data(name="C" + str(i),
-                shape=[-1, 1],
-                lod_level=1,
-                dtype="int64") for i in range(1, 27)
-]
-
-label = fluid.data(name="label", shape=[-1, 1], dtype="int64")
-inputs = [dense_input] + sparse_input_ids + [label]
-```
+正如数据准备章节所介绍，Criteo数据集中，分为连续数据与离散（稀疏）数据，所以整体而言，CTR-DNN模型的数据输入层包括三个，分别是：`dense_input`用于输入连续数据，维度由超参数`dense_input_dim`指定，数据类型是归一化后的浮点型数据。`sparse_inputs`用于记录离散数据，在Criteo数据集中，共有26个slot，所以我们创建了名为`1~26`的26个稀疏参数输入，数据类型为整数；最后是每条样本的`label`，代表了是否被点击，数据类型是整数，0代表负样例，1代表正样例。
 
 ### CTR-DNN模型组网
 
-CTR-DNN模型的组网比较直观，本质是一个二分类任务，代码参考`model.py`。模型主要组成是一个`Embedding`层，三个`FC`层，以及相应的分类任务的loss计算和auc计算。
+CTR-DNN模型的组网比较直观，本质是一个二分类任务，代码参考`model.py`。模型主要组成是一个`Embedding`层，四个`FC`层，以及相应的分类任务的loss计算和auc计算。
 
 #### Embedding层
-首先介绍Embedding层的搭建方式：`Embedding`层的输入是`sparse_input`，shape由超参的`sparse_feature_dim`和`embedding_size`定义。需要特别解释的是`is_sparse`参数，当我们指定`is_sprase=True`后，计算图会将该参数视为稀疏参数，反向更新以及分布式通信时，都以稀疏的方式进行，会极大的提升运行效率，同时保证效果一致。
+首先介绍Embedding层的搭建方式：`Embedding`层的输入是`sparse_input`，由超参的`sparse_feature_number`和`sparse_feature_dimshape`定义。需要特别解释的是`is_sparse`参数，当我们指定`is_sprase=True`后，计算图会将该参数视为稀疏参数，反向更新以及分布式通信时，都以稀疏的方式进行，会极大的提升运行效率，同时保证效果一致。
 
 各个稀疏的输入通过Embedding层后，将其合并起来，置于一个list内，以方便进行concat的操作。
 
 ```python
 def embedding_layer(input):
-   return fluid.layers.embedding(
+    if self.distributed_embedding:
+        emb = fluid.contrib.layers.sparse_embedding(
+            input=input,
+            size=[self.sparse_feature_number, self.sparse_feature_dim],
+            param_attr=fluid.ParamAttr(
+                name="SparseFeatFactors",
+                initializer=fluid.initializer.Uniform()))
+    else:
+        emb = fluid.layers.embedding(
             input=input,
             is_sparse=True,
-            size=[args.sparse_feature_dim, 
-                  args.embedding_size],
+            is_distributed=self.is_distributed,
+            size=[self.sparse_feature_number, self.sparse_feature_dim],
             param_attr=fluid.ParamAttr(
-            name="SparseFeatFactors",
-            initializer=fluid.initializer.Uniform()),
-   )
+                name="SparseFeatFactors",
+                initializer=fluid.initializer.Uniform()))
+    emb_sum = fluid.layers.sequence_pool(input=emb, pool_type='sum')
+    return emb_sum
 
-sparse_embed_seq = list(map(embedding_layer, inputs[1:-1])) # [C1~C26]
+sparse_embed_seq = list(map(embedding_layer, self.sparse_inputs)) # [C1~C26]
 ```
 
 #### FC层
-将离散数据通过embedding查表得到的值，与连续数据的输入进行`concat`操作，合为一个整体输入，作为全链接层的原始输入。我们共设计了3层FC，每层FC的输出维度都为400，每层FC都后接一个`relu`激活函数，每层FC的初始化方式为符合正态分布的随机初始化，标准差与上一层的输出维度的平方根成反比。
+将离散数据通过embedding查表得到的值，与连续数据的输入进行`concat`操作，合为一个整体输入，作为全链接层的原始输入。我们共设计了4层FC，每层FC的输出维度由超参`fc_sizes`指定，每层FC都后接一个`relu`激活函数，每层FC的初始化方式为符合正态分布的随机初始化，标准差与上一层的输出维度的平方根成反比。
 ```python
-concated = fluid.layers.concat(sparse_embed_seq + inputs[0:1], axis=1)
-        
-fc1 = fluid.layers.fc(
-   input=concated,
-   size=400,
-   act="relu",
-   param_attr=fluid.ParamAttr(initializer=fluid.initializer.Normal(
-         scale=1 / math.sqrt(concated.shape[1]))),
-)
-fc2 = fluid.layers.fc(
-   input=fc1,
-   size=400,
-   act="relu",
-   param_attr=fluid.ParamAttr(initializer=fluid.initializer.Normal(
-         scale=1 / math.sqrt(fc1.shape[1]))),
-)
-fc3 = fluid.layers.fc(
-   input=fc2,
-   size=400,
-   act="relu",
-   param_attr=fluid.ParamAttr(initializer=fluid.initializer.Normal(
-         scale=1 / math.sqrt(fc2.shape[1]))),
-)
+concated = fluid.layers.concat(
+    sparse_embed_seq + [self.dense_input], axis=1)
+
+fcs = [concated]
+hidden_layers = envs.get_global_env("hyper_parameters.fc_sizes")
+
+for size in hidden_layers:
+    output = fluid.layers.fc(
+        input=fcs[-1],
+        size=size,
+        act='relu',
+        param_attr=fluid.ParamAttr(
+            initializer=fluid.initializer.Normal(
+                scale=1.0 / math.sqrt(fcs[-1].shape[1]))))
+    fcs.append(output)
+
 ```
 #### Loss及Auc计算
 - 预测的结果通过一个输出shape为2的FC层给出，该FC层的激活函数是softmax，会给出每条样本分属于正负样本的概率。
 - 每条样本的损失由交叉熵给出，交叉熵的输入维度为[batch_size,2]，数据类型为float，label的输入维度为[batch_size,1]，数据类型为int。
 - 该batch的损失`avg_cost`是各条样本的损失之和
-- 我们同时还会计算预测的auc，auc的结果由`fluid.layers.auc()`给出，该层的返回值有三个，分别是全局auc: `auc_var`，当前batch的auc: `batch_auc_var`，以及auc_states: `auc_states`，auc_states包含了`batch_stat_pos, batch_stat_neg, stat_pos, stat_neg`信息。`batch_auc`我们取近20个batch的平均，由参数`slide_steps=20`指定，roc曲线的离散化的临界数值设置为4096，由`num_thresholds=2**12`指定。
+- 我们同时还会计算预测的auc，auc的结果由`fluid.layers.auc()`给出，该层的返回值有三个，分别是从第一个batch累计到当前batch的全局auc: `auc`，最近几个batch的auc: `batch_auc`，以及auc_states: `_`，auc_states包含了`batch_stat_pos, batch_stat_neg, stat_pos, stat_neg`信息。`batch_auc`我们取近20个batch的平均，由参数`slide_steps=20`指定，roc曲线的离散化的临界数值设置为4096，由`num_thresholds=2**12`指定。
 ```
 predict = fluid.layers.fc(
-            input=fc3,
-            size=2,
-            act="softmax",
-            param_attr=fluid.ParamAttr(initializer=fluid.initializer.Normal(
-                scale=1 / math.sqrt(fc3.shape[1]))),
-        )
-
-cost = fluid.layers.cross_entropy(input=predict, label=inputs[-1])
-avg_cost = fluid.layers.reduce_sum(cost)
-accuracy = fluid.layers.accuracy(input=predict, label=inputs[-1])
-auc_var, batch_auc_var, auc_states = fluid.layers.auc(
-                                          input=predict,
-                                          label=inputs[-1],
-                                          num_thresholds=2**12,
-                                          slide_steps=20)
-```
+    input=fcs[-1],
+    size=2,
+    act="softmax",
+    param_attr=fluid.ParamAttr(initializer=fluid.initializer.Normal(
+        scale=1 / math.sqrt(fcs[-1].shape[1]))))
 
-完成上述组网后，我们最终可以通过训练拿到`avg_cost`与`auc`两个重要指标。
+self.predict = predict
 
+auc, batch_auc, _ = fluid.layers.auc(input=self.predict,label=self.label_input,
+                                     num_thresholds=2**12,
+                                     slide_steps=20)
+
+cost = fluid.layers.cross_entropy(
+            input=self.predict, label=self.label_input)
+avg_cost = fluid.layers.reduce_mean(cost)
+```
+
+完成上述组网后，我们最终可以通过训练拿到`BATCH_AUC`与`auc`两个重要指标。
+```
+PaddleRec: Runner single_cpu_infer Begin
+Executor Mode: infer
+processor_register begin
+Running SingleInstance.
+Running SingleNetwork.
+Running SingleInferStartup.
+Running SingleInferRunner.
+load persistables from increment_dnn/3
+batch: 20, BATCH_AUC: [0.75670043], AUC: [0.77490453]
+batch: 40, BATCH_AUC: [0.77020144], AUC: [0.77490437]
+batch: 60, BATCH_AUC: [0.77464683], AUC: [0.77490435]
+batch: 80, BATCH_AUC: [0.76858989], AUC: [0.77490416]
+batch: 100, BATCH_AUC: [0.75728286], AUC: [0.77490362]
+batch: 120, BATCH_AUC: [0.75007016], AUC: [0.77490286]
+...
+batch: 720, BATCH_AUC: [0.76840144], AUC: [0.77489881]
+batch: 740, BATCH_AUC: [0.76659033], AUC: [0.77489854]
+batch: 760, BATCH_AUC: [0.77332639], AUC: [0.77489849]
+batch: 780, BATCH_AUC: [0.78361653], AUC: [0.77489874]
+Infer phase2 of epoch increment_dnn/3 done, use time: 52.7707588673, global metrics: BATCH_AUC=[0.78361653], AUC=[0.77489874]
+PaddleRec Finish
+```
 
 ## 流式训练（OnlineLearning）任务启动及配置流程
 
@@ -387,5 +409,5 @@ auc_var, batch_auc_var, auc_states = fluid.layers.auc(
     ```    
 4. 准备好数据后， 即可按照标准的训练流程进行流式训练了
     ```shell
-    python -m paddlerec.run -m models/rerank/ctr-dnn/config.yaml
+    python -m paddlerec.run -m models/rank/dnn/config.yaml
     ```
diff --git a/models/rank/dnn/data/get_slot_data.py b/models/rank/dnn/data/get_slot_data.py
index cacdc279bd9877bfe974e6f093ba912972bee876..105a01db30f048cf5152eb95de84e6f867bf1275 100755
--- a/models/rank/dnn/data/get_slot_data.py
+++ b/models/rank/dnn/data/get_slot_data.py
@@ -61,8 +61,7 @@ class CriteoDataset(dg.MultiSlotDataGenerator):
                 s += " dense_feature:" + str(i)
             for i in range(1, 1 + len(categorical_range_)):
                 s += " " + str(i) + ":" + str(sparse_feature[i - 1][0])
-            print(s.strip())
-            yield None
+            print(s.strip())  # add print for data preprocessing
 
         return reader
 
diff --git a/models/recall/gru4rec/README.md b/models/recall/gru4rec/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..dc44dbb4848f75607c6f3ce6b412ac5100095ba0
--- /dev/null
+++ b/models/recall/gru4rec/README.md
@@ -0,0 +1,206 @@
+# GRU4REC
+
+以下是本例的简要目录结构及说明： 
+
+```
+├── data #样例数据及数据处理相关文件
+  ├── train
+    ├── small_train.txt # 样例训练数据
+  ├── test
+    ├── small_test.txt # 样例测试数据
+  ├── convert_format.py # 数据转换脚本
+  ├── download.py # 数据下载脚本
+  ├── preprocess.py # 数据预处理脚本
+  ├── text2paddle.py # paddle训练数据生成脚本
+├── __init__.py
+├── README.md # 文档
+├── model.py #模型文件
+├── config.yaml #配置文件
+├── data_prepare.sh #一键数据处理脚本
+├── rsc15_reader.py #reader
+```
+
+注：在阅读该示例前，建议您先了解以下内容：
+
+[paddlerec入门教程](https://github.com/PaddlePaddle/PaddleRec/blob/master/README.md)
+
+
+---
+## 内容
+
+- [模型简介](#模型简介)
+- [数据准备](#数据准备)
+- [运行环境](#运行环境)
+- [快速开始](#快速开始)
+- [论文复现](#论文复现)
+- [进阶使用](#进阶使用)
+- [FAQ](#FAQ)
+
+## 模型简介
+GRU4REC模型的介绍可以参阅论文[Session-based Recommendations with Recurrent Neural Networks](https://arxiv.org/abs/1511.06939)。
+
+论文的贡献在于首次将RNN（GRU）运用于session-based推荐，相比传统的KNN和矩阵分解，效果有明显的提升。
+
+论文的核心思想是在一个session中，用户点击一系列item的行为看做一个序列，用来训练RNN模型。预测阶段，给定已知的点击序列作为输入，预测下一个可能点击的item。
+
+session-based推荐应用场景非常广泛，比如用户的商品浏览、新闻点击、地点签到等序列数据。
+
+本模型配置默认使用demo数据集，若进行精度验证，请参考[论文复现](#论文复现)部分。
+
+本项目支持功能
+
+训练：单机CPU、单机单卡GPU、本地模拟参数服务器训练、增量训练，配置请参考 [启动训练](https://github.com/PaddlePaddle/PaddleRec/blob/master/doc/train.md)   
+
+预测：单机CPU、单机单卡GPU；配置请参考[PaddleRec 离线预测](https://github.com/PaddlePaddle/PaddleRec/blob/master/doc/predict.md) 
+
+## 数据处理
+本示例中数据处理共包含三步：
+- Step1: 原始数据数据集下载
+```
+cd data/
+python download.py
+```
+- Step2: 数据预处理及格式转换。
+  1. 以session_id为key合并原始数据集，得到每个session的日期，及顺序点击列表。
+  2. 过滤掉长度为1的session；过滤掉点击次数小于5的items。
+  3. 训练集、测试集划分。原始数据集里最新日期七天内的作为训练集，更早之前的数据作为测试集。
+```
+python preprocess.py
+python convert_format.py
+```
+这一步之后，会在data/目录下得到两个文件，rsc15_train_tr_paddle.txt为原始训练文件，rsc15_test_paddle.txt为原始测试文件。格式如下所示：
+```
+214536502 214536500 214536506 214577561
+214662742 214662742 214825110 214757390 214757407 214551617
+214716935 214774687 214832672
+214836765 214706482
+214701242 214826623
+214826835 214826715
+214838855 214838855
+214576500 214576500 214576500
+214821275 214821275 214821371 214821371 214821371 214717089 214563337 214706462 214717436 214743335 214826837 214819762
+214717867 21471786
+```
+- Step3: 生成字典并整理数据路径。这一步会根据训练和测试文件生成字典和对应的paddle输入文件，并将训练文件统一放在data/all_train目录下，测试文件统一放在data/all_test目录下。
+```
+mkdir raw_train_data && mkdir raw_test_data
+mv rsc15_train_tr_paddle.txt raw_train_data/ && mv rsc15_test_paddle.txt raw_test_data/
+mkdir all_train && mkdir all_test
+
+python text2paddle.py raw_train_data/ raw_test_data/ all_train all_test vocab.txt
+```
+
+方便起见，我们提供了一键式数据生成脚本：
+```
+sh data_prepare.sh
+```
+
+## 运行环境
+
+PaddlePaddle>=1.7.2 
+
+python 2.7/3.5/3.6/3.7
+
+PaddleRec >=0.1
+
+os : windows/linux/macos
+
+## 快速开始
+
+### 单机训练
+
+在config.yaml文件中设置好设备，epochs等。
+```
+runner:
+- name: cpu_train_runner
+  class: train
+  device: cpu  # gpu
+  epochs: 10
+  save_checkpoint_interval: 1
+  save_inference_interval: 1
+  save_checkpoint_path: "increment_gru4rec"
+  save_inference_path: "inference_gru4rec"
+  save_inference_feed_varnames: ["src_wordseq", "dst_wordseq"] # feed vars of save inference
+  save_inference_fetch_varnames: ["mean_0.tmp_0", "top_k_0.tmp_0"]
+  print_interval: 10
+  phases: [train]
+
+```
+
+### 单机预测
+
+在config.yaml文件中设置好设备，epochs等。
+```
+- name: cpu_infer_runner
+  class: infer
+  init_model_path: "increment_gru4rec"
+  device: cpu  # gpu
+  phases: [infer]
+```
+
+### 运行
+```
+python -m paddlerec.run -m paddlerec.models.recall.gru4rec
+```
+
+### 结果展示
+
+样例数据训练结果展示：
+
+```
+Running SingleStartup.
+Running SingleRunner.
+2020-09-22 03:31:18,167-INFO:   [Train],  epoch: 0,  batch: 10, time_each_interval: 4.34s, RecallCnt: [1669.], cost: [8.366313], InsCnt: [16228.], Acc(Recall@20): [0.10284693]
+2020-09-22 03:31:21,982-INFO:   [Train],  epoch: 0,  batch: 20, time_each_interval: 3.82s, RecallCnt: [3168.], cost: [8.170701], InsCnt: [31943.], Acc(Recall@20): [0.09917666]
+2020-09-22 03:31:25,797-INFO:   [Train],  epoch: 0,  batch: 30, time_each_interval: 3.81s, RecallCnt: [4855.], cost: [8.017181], InsCnt: [47892.], Acc(Recall@20): [0.10137393]
+...
+epoch 0 done, use time: 6003.78719687, global metrics: cost=[4.4394927], InsCnt=23622448.0 RecallCnt=14547467.0 Acc(Recall@20)=0.6158323218660487
+2020-09-22 05:11:17,761-INFO:   save epoch_id:0 model into: "inference_gru4rec/0"
+...
+epoch 9 done, use time: 6009.97707605, global metrics: cost=[4.069373], InsCnt=236237470.0 RecallCnt=162838200.0 Acc(Recall@20)=0.6892988086157644
+2020-09-22 20:17:11,358-INFO:   save epoch_id:9 model into: "inference_gru4rec/9"
+PaddleRec Finish
+```
+
+样例数据预测结果展示:
+```
+Running SingleInferStartup.
+Running SingleInferRunner.
+load persistables from increment_gru4rec/9
+2020-09-23 03:46:21,081-INFO:   [Infer] batch: 20, time_each_interval: 3.68s, RecallCnt: [24875.], InsCnt: [35581.], Acc(Recall@20): [0.6991091]
+Infer infer of epoch 9 done, use time: 5.25408315659, global metrics: InsCnt=52551.0 RecallCnt=36720.0 Acc(Recall@20)=0.698749785922247
+...
+Infer infer of epoch 0 done, use time: 5.20699501038, global metrics: InsCnt=52551.0 RecallCnt=33664.0 Acc(Recall@20)=0.6405967536298073
+PaddleRec Finish
+```
+
+## 论文复现
+
+用原论文的完整数据复现论文效果需要在config.yaml修改超参：
+- batch_size: 修改config.yaml中dataset_train数据集的batch_size为500。
+- epochs: 修改config.yaml中runner的epochs为10。
+- 数据源：修改config.yaml中dataset_train数据集的data_path为"{workspace}/data/all_train"，dataset_test数据集的data_path为"{workspace}/data/all_test"。
+
+使用gpu训练10轮 测试结果为
+
+epoch | 测试recall@20 | 速度(s)
+-- | -- | --
+1 | 0.6406 | 6003
+2 | 0.6727 | 6007
+3 | 0.6831 | 6108
+4 | 0.6885 | 6025
+5 | 0.6913 | 6019
+6 | 0.6931 | 6011
+7 | 0.6952 | 6015
+8 | 0.6968 | 6076
+9 | 0.6972 | 6076
+10 | 0.6987| 6009
+
+修改后运行方案：修改config.yaml中的'workspace'为config.yaml的目录位置，执行
+```
+python -m paddlerec.run -m /home/your/dir/config.yaml #调试模式 直接指定本地config的绝对路径
+```
+
+## 进阶使用
+
+## FAQ
diff --git a/models/recall/gru4rec/config.yaml b/models/recall/gru4rec/config.yaml
index 09c4217a67f24126bc74e3f600415b7fcd459cba..67ac5f7692fcc94e4b247fe5fb1ae2290c3018ff 100644
--- a/models/recall/gru4rec/config.yaml
+++ b/models/recall/gru4rec/config.yaml
@@ -16,18 +16,19 @@ workspace: "models/recall/gru4rec"
 
 dataset:
 - name: dataset_train
-  batch_size: 5
-  type: QueueDataset
+  batch_size: 500
+  type: DataLoader # QueueDataset
   data_path: "{workspace}/data/train"
   data_converter: "{workspace}/rsc15_reader.py"
 - name: dataset_infer
-  batch_size: 5
-  type: QueueDataset
+  batch_size: 500
+  type: DataLoader #QueueDataset
   data_path: "{workspace}/data/test"
   data_converter: "{workspace}/rsc15_reader.py"
 
 hyper_parameters:
-  vocab_size: 1000
+  recall_k: 20
+  vocab_size: 37483
   hid_size: 100
   emb_lr_x: 10.0
   gru_lr_x: 1.0
@@ -40,30 +41,34 @@ hyper_parameters:
     strategy: async
 
 #use infer_runner mode and modify 'phase' below if infer
-mode: train_runner
+mode: [cpu_train_runner, cpu_infer_runner]
 #mode: infer_runner
 
 runner:
-- name: train_runner
+- name: cpu_train_runner
   class: train
   device: cpu
-  epochs: 3
-  save_checkpoint_interval: 2
-  save_inference_interval: 4
-  save_checkpoint_path: "increment"
-  save_inference_path: "inference"
+  epochs: 10
+  save_checkpoint_interval: 1
+  save_inference_interval: 1
+  save_checkpoint_path: "increment_gru4rec"
+  save_inference_path: "inference_gru4rec"
+  save_inference_feed_varnames: ["src_wordseq", "dst_wordseq"] # feed vars of save inference
+  save_inference_fetch_varnames: ["mean_0.tmp_0", "top_k_0.tmp_0"]
   print_interval: 10
-- name: infer_runner
+  phases: [train]
+- name: cpu_infer_runner
   class: infer
-  init_model_path: "increment/0"
+  init_model_path: "increment_gru4rec"
   device: cpu
+  phases: [infer]
 
 phase:
 - name: train
   model: "{workspace}/model.py"
   dataset_name: dataset_train
   thread_num: 1
-#- name: infer
-#  model: "{workspace}/model.py"
-#  dataset_name: dataset_infer
-#  thread_num: 1
+- name: infer
+  model: "{workspace}/model.py"
+  dataset_name: dataset_infer
+  thread_num: 1
diff --git a/models/recall/gru4rec/data/convert_format.py b/models/recall/gru4rec/data/convert_format.py
new file mode 100644
index 0000000000000000000000000000000000000000..9a6867e623c1a783307f7978015bde17b0692b1a
--- /dev/null
+++ b/models/recall/gru4rec/data/convert_format.py
@@ -0,0 +1,48 @@
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys
+import codecs
+
+
+def convert_format(input, output):
+    with codecs.open(input, "r", encoding='utf-8') as rf:
+        with codecs.open(output, "w", encoding='utf-8') as wf:
+            last_sess = -1
+            sign = 1
+            i = 0
+            for l in rf:
+                i = i + 1
+                if i == 1:
+                    continue
+                if (i % 1000000 == 1):
+                    print(i)
+                tokens = l.strip().split()
+                if (int(tokens[0]) != last_sess):
+                    if (sign):
+                        sign = 0
+                        wf.write(tokens[1] + " ")
+                    else:
+                        wf.write("\n" + tokens[1] + " ")
+                    last_sess = int(tokens[0])
+                else:
+                    wf.write(tokens[1] + " ")
+
+
+input = "rsc15_train_tr.txt"
+output = "rsc15_train_tr_paddle.txt"
+input2 = "rsc15_test.txt"
+output2 = "rsc15_test_paddle.txt"
+convert_format(input, output)
+convert_format(input2, output2)
diff --git a/models/recall/gru4rec/data/download.py b/models/recall/gru4rec/data/download.py
new file mode 100644
index 0000000000000000000000000000000000000000..b0e0979ee72bd9e6c2e24746577df970c989b6d0
--- /dev/null
+++ b/models/recall/gru4rec/data/download.py
@@ -0,0 +1,61 @@
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import requests
+import sys
+import time
+import os
+
+lasttime = time.time()
+FLUSH_INTERVAL = 0.1
+
+
+def progress(str, end=False):
+    global lasttime
+    if end:
+        str += "\n"
+        lasttime = 0
+    if time.time() - lasttime >= FLUSH_INTERVAL:
+        sys.stdout.write("\r%s" % str)
+        lasttime = time.time()
+        sys.stdout.flush()
+
+
+def _download_file(url, savepath, print_progress):
+    r = requests.get(url, stream=True)
+    total_length = r.headers.get('content-length')
+
+    if total_length is None:
+        with open(savepath, 'wb') as f:
+            shutil.copyfileobj(r.raw, f)
+    else:
+        with open(savepath, 'wb') as f:
+            dl = 0
+            total_length = int(total_length)
+            starttime = time.time()
+            if print_progress:
+                print("Downloading %s" % os.path.basename(savepath))
+            for data in r.iter_content(chunk_size=4096):
+                dl += len(data)
+                f.write(data)
+                if print_progress:
+                    done = int(50 * dl / total_length)
+                    progress("[%-50s] %.2f%%" %
+                             ('=' * done, float(100 * dl) / total_length))
+        if print_progress:
+            progress("[%-50s] %.2f%%" % ('=' * 50, 100), end=True)
+
+
+_download_file("https://paddlerec.bj.bcebos.com/gnn%2Fyoochoose-clicks.dat",
+               "./yoochoose-clicks.dat", True)
diff --git a/models/recall/gru4rec/data/preprocess.py b/models/recall/gru4rec/data/preprocess.py
new file mode 100644
index 0000000000000000000000000000000000000000..233237265ec5194bd30fc61fcfbefe189d3d8162
--- /dev/null
+++ b/models/recall/gru4rec/data/preprocess.py
@@ -0,0 +1,70 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Jun 25 16:20:12 2015
+
+@author: Balázs Hidasi
+"""
+
+import numpy as np
+import pandas as pd
+import datetime as dt
+import time
+
+PATH_TO_ORIGINAL_DATA = './'
+PATH_TO_PROCESSED_DATA = './'
+
+data = pd.read_csv(
+    PATH_TO_ORIGINAL_DATA + 'yoochoose-clicks.dat',
+    sep=',',
+    header=0,
+    usecols=[0, 1, 2],
+    dtype={0: np.int32,
+           1: str,
+           2: np.int64})
+data.columns = ['session_id', 'timestamp', 'item_id']
+data['Time'] = data.timestamp.apply(lambda x: time.mktime(dt.datetime.strptime(x, '%Y-%m-%dT%H:%M:%S.%fZ').timetuple())) #This is not UTC. It does not really matter.
+del (data['timestamp'])
+
+session_lengths = data.groupby('session_id').size()
+data = data[np.in1d(data.session_id, session_lengths[session_lengths > 1]
+                    .index)]
+item_supports = data.groupby('item_id').size()
+data = data[np.in1d(data.item_id, item_supports[item_supports >= 5].index)]
+session_lengths = data.groupby('session_id').size()
+data = data[np.in1d(data.session_id, session_lengths[session_lengths >= 2]
+                    .index)]
+
+tmax = data.Time.max()
+session_max_times = data.groupby('session_id').Time.max()
+session_train = session_max_times[session_max_times < tmax - 86400].index
+session_test = session_max_times[session_max_times >= tmax - 86400].index
+train = data[np.in1d(data.session_id, session_train)]
+test = data[np.in1d(data.session_id, session_test)]
+test = test[np.in1d(test.item_id, train.item_id)]
+tslength = test.groupby('session_id').size()
+test = test[np.in1d(test.session_id, tslength[tslength >= 2].index)]
+print('Full train set\n\tEvents: {}\n\tSessions: {}\n\tItems: {}'.format(
+    len(train), train.session_id.nunique(), train.item_id.nunique()))
+train.to_csv(
+    PATH_TO_PROCESSED_DATA + 'rsc15_train_full.txt', sep='\t', index=False)
+print('Test set\n\tEvents: {}\n\tSessions: {}\n\tItems: {}'.format(
+    len(test), test.session_id.nunique(), test.item_id.nunique()))
+test.to_csv(PATH_TO_PROCESSED_DATA + 'rsc15_test.txt', sep='\t', index=False)
+
+tmax = train.Time.max()
+session_max_times = train.groupby('session_id').Time.max()
+session_train = session_max_times[session_max_times < tmax - 86400].index
+session_valid = session_max_times[session_max_times >= tmax - 86400].index
+train_tr = train[np.in1d(train.session_id, session_train)]
+valid = train[np.in1d(train.session_id, session_valid)]
+valid = valid[np.in1d(valid.item_id, train_tr.item_id)]
+tslength = valid.groupby('session_id').size()
+valid = valid[np.in1d(valid.session_id, tslength[tslength >= 2].index)]
+print('Train set\n\tEvents: {}\n\tSessions: {}\n\tItems: {}'.format(
+    len(train_tr), train_tr.session_id.nunique(), train_tr.item_id.nunique()))
+train_tr.to_csv(
+    PATH_TO_PROCESSED_DATA + 'rsc15_train_tr.txt', sep='\t', index=False)
+print('Validation set\n\tEvents: {}\n\tSessions: {}\n\tItems: {}'.format(
+    len(valid), valid.session_id.nunique(), valid.item_id.nunique()))
+valid.to_csv(
+    PATH_TO_PROCESSED_DATA + 'rsc15_train_valid.txt', sep='\t', index=False)
diff --git a/models/recall/gru4rec/data/text2paddle.py b/models/recall/gru4rec/data/text2paddle.py
new file mode 100644
index 0000000000000000000000000000000000000000..ff952825944d68edd2f998087aea6cd9c725e9b5
--- /dev/null
+++ b/models/recall/gru4rec/data/text2paddle.py
@@ -0,0 +1,115 @@
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys
+import six
+import collections
+import os
+import sys
+import io
+if six.PY2:
+    reload(sys)
+    sys.setdefaultencoding('utf-8')
+
+
+def word_count(input_file, word_freq=None):
+    """
+    compute word count from corpus
+    """
+    if word_freq is None:
+        word_freq = collections.defaultdict(int)
+
+    for l in input_file:
+        for w in l.strip().split():
+            word_freq[w] += 1
+
+    return word_freq
+
+
+def build_dict(min_word_freq=0, train_dir="", test_dir=""):
+    """
+    Build a word dictionary from the corpus,  Keys of the dictionary are words,
+    and values are zero-based IDs of these words.
+    """
+    word_freq = collections.defaultdict(int)
+    files = os.listdir(train_dir)
+    for fi in files:
+        with io.open(os.path.join(train_dir, fi), "r") as f:
+            word_freq = word_count(f, word_freq)
+    files = os.listdir(test_dir)
+    for fi in files:
+        with io.open(os.path.join(test_dir, fi), "r") as f:
+            word_freq = word_count(f, word_freq)
+
+    word_freq = [x for x in six.iteritems(word_freq) if x[1] > min_word_freq]
+    word_freq_sorted = sorted(word_freq, key=lambda x: (-x[1], x[0]))
+    words, _ = list(zip(*word_freq_sorted))
+    word_idx = dict(list(zip(words, six.moves.range(len(words)))))
+    return word_idx
+
+
+def write_paddle(word_idx, train_dir, test_dir, output_train_dir,
+                 output_test_dir):
+    files = os.listdir(train_dir)
+    if not os.path.exists(output_train_dir):
+        os.mkdir(output_train_dir)
+    for fi in files:
+        with io.open(os.path.join(train_dir, fi), "r") as f:
+            with io.open(os.path.join(output_train_dir, fi), "w") as wf:
+                for l in f:
+                    l = l.strip().split()
+                    l = [word_idx.get(w) for w in l]
+                    for w in l:
+                        wf.write(str2file(str(w) + " "))
+                    wf.write(str2file("\n"))
+
+    files = os.listdir(test_dir)
+    if not os.path.exists(output_test_dir):
+        os.mkdir(output_test_dir)
+    for fi in files:
+        with io.open(os.path.join(test_dir, fi), "r", encoding='utf-8') as f:
+            with io.open(
+                    os.path.join(output_test_dir, fi), "w",
+                    encoding='utf-8') as wf:
+                for l in f:
+                    l = l.strip().split()
+                    l = [word_idx.get(w) for w in l]
+                    for w in l:
+                        wf.write(str2file(str(w) + " "))
+                    wf.write(str2file("\n"))
+
+
+def str2file(str):
+    if six.PY2:
+        return str.decode("utf-8")
+    else:
+        return str
+
+
+def text2paddle(train_dir, test_dir, output_train_dir, output_test_dir,
+                output_vocab):
+    vocab = build_dict(0, train_dir, test_dir)
+    print("vocab size:", str(len(vocab)))
+    with io.open(output_vocab, "w", encoding='utf-8') as wf:
+        wf.write(str2file(str(len(vocab)) + "\n"))
+    write_paddle(vocab, train_dir, test_dir, output_train_dir, output_test_dir)
+
+
+train_dir = sys.argv[1]
+test_dir = sys.argv[2]
+output_train_dir = sys.argv[3]
+output_test_dir = sys.argv[4]
+output_vocab = sys.argv[5]
+text2paddle(train_dir, test_dir, output_train_dir, output_test_dir,
+            output_vocab)
diff --git a/models/recall/gru4rec/data_prepare.sh b/models/recall/gru4rec/data_prepare.sh
new file mode 100644
index 0000000000000000000000000000000000000000..f3dc2b3f7e42fd876391cb385dfa640d2ec9a8fd
--- /dev/null
+++ b/models/recall/gru4rec/data_prepare.sh
@@ -0,0 +1,30 @@
+#! /bin/bash
+
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -e
+
+echo "begin to download data"
+cd data && python download.py
+
+python preprocess.py
+echo "begin to convert data (binary -> txt)"
+python convert_format.py
+
+mkdir raw_train_data && mkdir raw_test_data
+mv rsc15_train_tr_paddle.txt raw_train_data/ && mv rsc15_test_paddle.txt raw_test_data/
+
+mkdir all_train && mkdir all_test
+python text2paddle.py raw_train_data/ raw_test_data/ all_train all_test vocab.txt
diff --git a/models/recall/gru4rec/model.py b/models/recall/gru4rec/model.py
index be12ad0f0b010b33789359592afbe8a5cfe42add..d8ebd3bded85f860ba6fa287f0ea41ef55c7168a 100644
--- a/models/recall/gru4rec/model.py
+++ b/models/recall/gru4rec/model.py
@@ -16,6 +16,7 @@ import paddle.fluid as fluid
 
 from paddlerec.core.utils import envs
 from paddlerec.core.model import ModelBase
+from paddlerec.core.metrics import RecallK
 
 
 class Model(ModelBase):
@@ -81,13 +82,13 @@ class Model(ModelBase):
                                      high=self.init_high_bound),
                                  learning_rate=self.fc_lr_x))
         cost = fluid.layers.cross_entropy(input=fc, label=dst_wordseq)
-        acc = fluid.layers.accuracy(
-            input=fc, label=dst_wordseq, k=self.recall_k)
+        acc = RecallK(input=fc, label=dst_wordseq, k=self.recall_k)
+
         if is_infer:
-            self._infer_results['recall20'] = acc
+            self._infer_results['Recall@20'] = acc
             return
         avg_cost = fluid.layers.mean(x=cost)
 
         self._cost = avg_cost
         self._metrics["cost"] = avg_cost
-        self._metrics["acc"] = acc
+        self._metrics["Recall@20"] = acc
diff --git a/models/recall/word2vec/README.md b/models/recall/word2vec/README.md
index 7f6ed7522801822b9281df84a6a6924f30eb2f87..88edf362cc90834826b959f799449c96017cdba8 100644
--- a/models/recall/word2vec/README.md
+++ b/models/recall/word2vec/README.md
@@ -222,15 +222,18 @@ Infer phase2 of epoch 3 done, use time: 4.43099021912, global metrics: acc=[1.]
 ## 论文复现
 
 1. 用原论文的完整数据复现论文效果需要在config.yaml修改超参：
+```
 - name: dataset_train 
   batch_size: 100 # 1. 修改batch_size为100
   type: DataLoader 
   data_path: "{workspace}/data/all_train" # 2. 修改数据为全量训练数据
-  word_count_dict_path: "{workspace}/data/all_dict/ word_count_dict.txt"   # 3. 修改词表为全量词表
+  word_count_dict_path: "{workspace}/data/all_dict/word_count_dict.txt"   # 3. 修改词表为全量词表
   data_converter: "{workspace}/w2v_reader.py"
+- name: dataset_infer
+  data_path: "{workspace}/data/all_test" # 4. 修改数据为全量测试数据
+  word_id_dict_path: "{workspace}/data/all_dict/word_id_dict.txt" # 5. 修改词表为全量词表
 
-- name: single_cpu_train
-  - epochs: # 4. 修改config.yaml中runner的epochs为5。
+```
 
 修改后运行方案：修改config.yaml中的'workspace'为config.yaml的目录位置，执行
 ```
diff --git a/models/recall/youtube_dnn/README.md b/models/recall/youtube_dnn/README.md
index d7ae92e268dcafded93d4298639ed47271302d44..7f44937fe3e15fc3aeacd99c5e393368458434ca 100644
--- a/models/recall/youtube_dnn/README.md
+++ b/models/recall/youtube_dnn/README.md
@@ -8,7 +8,7 @@
 		├── data.txt
     ├── test
 		├── data.txt
-├── generate_ramdom_data # 随机训练数据生成文件
+├── generate_ramdom_data.py # 随机训练数据生成文件
 ├── __init__.py
 ├── README.md # 文档
 ├── model.py #模型文件
@@ -107,7 +107,7 @@ python infer.py --use_gpu 1 --test_epoch 19 --inference_model_dir ./inference_yo
 ```
 ### 运行
 ```
-python -m paddlerec.run -m paddlerec.models.recall.w2v
+python -m paddlerec.run -m paddlerec.models.recall.youtube_dnn
 ```
 
 ### 结果展示
diff --git a/models/treebased/tdm/README.md b/models/treebased/tdm/README.md
index 14f25323df42b8c0e9417a0eb24e345d9da6221f..ea53f44cb974d95b8651915143e14f1c9d9b5b60 100644
--- a/models/treebased/tdm/README.md
+++ b/models/treebased/tdm/README.md
@@ -13,6 +13,7 @@ cd paddle-rec
 
 python -m paddlerec.run -m models/treebased/tdm/config.yaml
 ```
+3. 建树及自定义训练的细节可以查阅[TDM-Demo建树及训练](./gen_tree/README.md)
 
 ## 树结构的准备
 ### 名词概念
diff --git a/models/treebased/tdm/build_tree.md b/models/treebased/tdm/build_tree.md
deleted file mode 100644
index 37ecb68f8bd48e3583a843b68c64ee8c1bd08f38..0000000000000000000000000000000000000000
--- a/models/treebased/tdm/build_tree.md
+++ /dev/null
@@ -1,19 +0,0 @@
-
-
-wget https://paddlerec.bj.bcebos.com/utils/tree_build_utils.tar.gz --no-check-certificate
-
-# input_path: embedding的路径
-# emb_shape: embedding中key-value，value的维度
-# emb格式要求： embedding_id(int64),embedding(float),embedding(float),......,embedding(float)
-# cluster_threads: 建树聚类所用线程
-python_172_anytree/bin/python -u main.py --input_path=./gen_emb/item_emb.txt --output_path=./ --emb_shape=24 --cluster_threads=4
-
-建树流程是：1、读取emb -> 2、kmeans聚类 -> 3、聚类结果整理为树 -> 4、基于树结构得到模型所需的4个文件
-    1    Layer_list：记录了每一层都有哪些节点。训练用
-    2    Travel_list：记录每个叶子节点的Travel路径。训练用
-    3    Tree_Info：记录了每个节点的信息，主要为：是否是item/item_id，所在层级，父节点，子节点。检索用
-    4    Tree_Embedding：记录所有节点的Embedding。训练及检索用
-
-注意一下训练数据输入的item是建树之前用的item id，还是基于树的node id，还是基于叶子的leaf id，在tdm_reader.py中，可以加载字典，做映射。
-用厂内版建树得到的输出文件夹里，有名为id2nodeid.txt的映射文件，格式是『hash值』+ 『树节点ID』+『叶子节点ID（表示第几个叶子节点，tdm_sampler op 所需的输入）』
-在另一个id2bidword.txt中，也有映射关系，格式是『hash值』+『原始item ID』，这个文件中仅存储了叶子节点的信息。
diff --git a/models/treebased/tdm/config.yaml b/models/treebased/tdm/config.yaml
index fed727ad3f71406c5645f08c69d0736eedf3d084..c1e6f6a48b55838f5cd1743e8313c61b71f8c207 100755
--- a/models/treebased/tdm/config.yaml
+++ b/models/treebased/tdm/config.yaml
@@ -59,49 +59,39 @@ hyper_parameters:
     tree_emb_path: "{workspace}/tree/tree_emb.npy"
 
 # select runner by name
-mode: runner1
-# config of each runner.
-# runner is a kind of paddle training class, which wraps the train/infer process.
+mode: [runner1]
+
 runner:
 - name: runner1
   class: train
   startup_class_path: "{workspace}/tdm_startup.py"
-  # num of epochs
   epochs: 10
-  # device to run training or infer
   device: cpu
   save_checkpoint_interval: 2 # save model interval of epochs
-  save_inference_interval: 4 # save inference
   save_checkpoint_path: "increment" # save checkpoint path
-  save_inference_path: "inference" # save inference path
-  save_inference_feed_varnames: [] # feed vars of save inference
-  save_inference_fetch_varnames: [] # fetch vars of save inference
   init_model_path: "" # load model path
   print_interval: 10
+  phases: [phase1]
 
 - name: runner2
   class: infer
   startup_class_path: "{workspace}/tdm_startup.py"
-  # device to run training or infer
   device: cpu
   init_model_path: "increment/0" # load model path
   print_interval: 1
+  phases: [phase2]
   
 - name: runner3
   class: local_cluster_train
   startup_class_path: "{workspace}/tdm_startup.py"
   fleet_mode: ps
   epochs: 10
-  # device to run training or infer
   device: cpu
   save_checkpoint_interval: 2 # save model interval of epochs
-  save_inference_interval: 4 # save inference
   save_checkpoint_path: "increment" # save checkpoint path
-  save_inference_path: "inference" # save inference path
-  save_inference_feed_varnames: [] # feed vars of save inference
-  save_inference_fetch_varnames: [] # fetch vars of save inference
   init_model_path: "init_model" # load model path
   print_interval: 10
+  phases: [phase1]
 
 # runner will run all the phase in each epoch
 phase:
@@ -109,7 +99,7 @@ phase:
   model: "{workspace}/model.py" # user-defined model
   dataset_name: dataset_train # select dataset by name
   thread_num: 1
-# - name: phase2
-#   model: "{workspace}/model.py"
-#   dataset_name: dataset_infer
-#   thread_num: 2
+- name: phase2
+  model: "{workspace}/model.py"
+  dataset_name: dataset_infer
+  thread_num: 2
diff --git a/models/treebased/tdm/gen_tree/README.md b/models/treebased/tdm/gen_tree/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..0444c4004e2c6a312ab6f3e23f79488dc04133c8
--- /dev/null
+++ b/models/treebased/tdm/gen_tree/README.md
@@ -0,0 +1,120 @@
+# TDM-Demo建树及训练
+
+## 建树所需环境
+Requirements:
+- python >= 2.7
+- paddlepaddle >= 1.7.2（建议1.7.2）
+- paddle-rec （克隆github paddlerec，执行python setup.py install）
+- sklearn
+- anytree
+
+
+## 建树流程
+
+### 生成建树所需Embedding
+
+- 生成Fake的emb
+
+```shell
+cd gen_tree
+python -u emb_util.py
+```
+
+生成的emb维度是[13, 64]，含义是共有13个item，每个item的embedding维度是64，生成的item_emb位于`gen_tree/item_emb.txt`
+
+格式为`emb_value_0(float) 空格 emb_value_1(float) ... emb_value_63(float) \t item_id `
+
+在demo中，要求item的编号从0开始，范围 [0, item_nums-1]
+
+真实场景可以通过各种hash映射满足该要求
+
+### 对Item_embedding进行聚类建树
+
+执行
+
+```shell
+cd gen_tree
+# emd_path: item_emb的地址
+# emb_size: item_emb的第二个维度，即每个item的emb的size（示例中为64）
+# threads: 多线程建树配置的线程数
+# n_clusters: 最终建树为几叉树，此处设置为2叉树
+python gen_tree.py --emd_path item_emb.txt --emb_size 64 --output_dir ./output --threads 1 --n_clusters 2
+```
+
+生成的训练所需树结构文件位于`gen_tree/output`
+```shell
+.
+├── id2item.json         # 树节点id到item id的映射表
+├── layer_list.txt       # 树的每个层级都有哪些节点
+├── travel_list.npy      # 每个item从根到叶子的遍历路径，按item顺序排序
+├── travel_list.txt      # 上个文件的明文txt
+├── tree_embedding.txt   # 所有节点按节点id排列组成的embedding
+├── tree_emb.npy         # 上个文件的.npy版本
+├── tree_info.npy        # 每个节点：是否对应item/父/层级/子节点，按节点顺序排列
+├── tree_info.txt        # 上个文件的明文txt
+└── tree.pkl             # 聚类得到的树结构
+```
+
+我们最终需要使用建树生成的以下四个文件，参与网络训练，参考`models/treebased/tdm/config.yaml`
+
+1. layer_list.txt
+2. travel_list.npy 
+3. tree_info.npy
+4. tree_emb.npy
+
+
+### 执行训练
+
+- 更改`config.yaml`中的配置
+
+首先更改
+```yaml
+hyper_parameters:
+    # ...
+    tree:
+        # 单机训练建议tree只load一次，保存为paddle tensor，之后从paddle模型热启
+        # 分布式训练trainer需要独立load 
+        # 预测时也改为从paddle模型加载
+        load_tree_from_numpy: True # only once
+        load_paddle_model: False # train & infer need, after load from npy, change it to True
+        tree_layer_path: "{workspace}/tree/layer_list.txt"
+        tree_travel_path: "{workspace}/tree/travel_list.npy"
+        tree_info_path: "{workspace}/tree/tree_info.npy"
+        tree_emb_path: "{workspace}/tree/tree_emb.npy"
+```
+将上述几个path改为建树得到的文件所在的地址
+
+再更改
+```yaml
+hyper_parameters:
+  max_layers: 4                          # 不含根节点，树的层数
+  node_nums: 26                          # 树共有多少个节点，数量与tree_info文件的行数相等
+  leaf_node_nums: 13                     # 树共有多少个叶子节点
+  layer_node_num_list: [2, 4, 8, 10]     # 树的每层有多少个节点
+  child_nums: 2                          # 每个节点最多有几个孩子结点（几叉树）
+  neg_sampling_list: [1, 2, 3, 4]        # 在树的每层做多少负采样，训练自定义的参数
+```
+
+若并不知道对上面几个参数具体值，可以试运行一下，paddlerec读取建树生成的文件后，会将具体信息打印到屏幕上，如下所示：
+```shell
+...
+File_list: ['models/treebased/tdm/data/train/demo_fake_input.txt']
+2020-09-10 15:17:19,259 - INFO - Run TDM Trainer Startup Pass
+2020-09-10 15:17:19,283 - INFO - load tree from numpy
+2020-09-10 15:17:19,284 - INFO - TDM Tree leaf node nums: 13
+2020-09-10 15:17:19,284 - INFO - TDM Tree max layer: 4
+2020-09-10 15:17:19,284 - INFO - TDM Tree layer_node_num_list: [2, 4, 8, 10]
+2020-09-10 15:17:19,285 - INFO - Begin Save Init model.
+2020-09-10 15:17:19,394 - INFO - End Save Init model.
+Running SingleRunner.
+...
+```
+将其抄到配置中即可
+
+- 训练
+
+执行
+```
+cd /PaddleRec # PaddleRec 克隆的根目录
+python -m paddlerec.run -m models/treebased/tdm/config.yaml
+```
diff --git a/models/treebased/tdm/gen_tree/__init__.py b/models/treebased/tdm/gen_tree/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..2dead222cc83400866870954bee502946e680bdd
--- /dev/null
+++ b/models/treebased/tdm/gen_tree/__init__.py
@@ -0,0 +1,17 @@
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from . import cluster
+
+__all__ = []
+__all__ += cluster.__all__
diff --git a/models/treebased/tdm/gen_tree/cluster.py b/models/treebased/tdm/gen_tree/cluster.py
new file mode 100644
index 0000000000000000000000000000000000000000..9b815ad1228ace49f429700f8cea11692ec8988f
--- /dev/null
+++ b/models/treebased/tdm/gen_tree/cluster.py
@@ -0,0 +1,311 @@
+# Copyright (C) 2016-2018 Alibaba Group Holding Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import print_function
+import codecs
+import os
+import time
+import collections
+import argparse
+
+import multiprocessing as mp
+import numpy as np
+
+from sklearn.cluster import KMeans
+import tree_builder
+
+__all__ = ['Cluster']
+
+
+class Cluster:
+    def __init__(self,
+                 filename,
+                 emb_size,
+                 id_offset=None,
+                 parall=16,
+                 prev_result=None,
+                 output_dir='./',
+                 _n_clusters=2):
+        self.filename = filename
+        self.emb_size = emb_size
+        self.mini_batch = 256
+        self.ids = None
+        self.data = None
+        self.items = None
+        self.parall = parall
+        self.queue = None
+        self.timeout = 5
+        self.id_offset = id_offset
+        self.codes = None
+        self.prev_result = prev_result
+        self.output_dir = output_dir
+        self.n_clusters = _n_clusters
+
+    def _read(self):
+        t1 = time.time()
+        ids = list()
+        data = list()
+        items = list()
+        count = 0
+        with codecs.open(self.filename, 'r', encoding='utf-8') as f:
+            for line in f:
+                arr = line.rstrip().split('\t')
+                if not arr:
+                    break
+                elif len(arr) == 1:
+                    label = arr[0]
+                    emb_vec = (np.random.random_sample(
+                        (self.emb_size, ))).tolist()
+                elif len(arr) == 2:
+                    label = arr[1]
+                    emb_vec = arr[0].split()
+                if len(emb_vec) != self.emb_size:
+                    continue
+                if label in items:
+                    index = items.index(label)
+                    for i in range(0, len(emb_vec)):
+                        data[index][i + 1] += float(emb_vec[i])
+                    data[index][0] += 1
+                else:
+                    items.append(label)
+                    ids.append(count)
+                    count += 1
+                    vector = list()
+                    vector.append(1)
+                    for i in range(0, len(emb_vec)):
+                        vector.append(float(emb_vec[i]))
+                    data.append(vector)
+        for i in range(len(data)):
+            data_len = len(data[0])
+            for j in range(1, data_len):
+                data[i][j] /= data[i][0]
+            data[i] = data[i][1:]
+        self.ids = np.array(ids)
+        self.data = np.array(data)
+        self.items = np.array(items)
+        t2 = time.time()
+
+        print("Read data done, {} records read, elapsed: {}".format(
+            len(ids), t2 - t1))
+
+    def train(self):
+        ''' Cluster data '''
+        self._read()
+        queue = mp.Queue()
+        self.process_prev_result(queue)
+        processes = []
+        pipes = []
+        for _ in range(self.parall):
+            a, b = mp.Pipe()
+            p = mp.Process(target=self._train, args=(b, queue))
+            processes.append(p)
+            pipes.append(a)
+            p.start()
+
+        self.codes = np.zeros((len(self.ids), ), dtype=np.int64)
+        for pipe in pipes:
+            codes = pipe.recv()
+            for i in range(len(codes)):
+                if codes[i] > 0:
+                    self.codes[i] = codes[i]
+
+        for p in processes:
+            p.join()
+
+        assert (queue.empty())
+        builder = tree_builder.TreeBuilder(self.output_dir, self.n_clusters)
+        builder.build(self.ids, self.codes, items=self.items, data=self.data)
+
+    def process_prev_result(self, queue):
+        if not self.prev_result:
+            queue.put((0, np.array(range(len(self.ids)))))
+            return True
+
+        di = dict()
+        for i, node_id in enumerate(self.ids):
+            di[node_id] = i
+
+        indexes = []
+        clusters = []
+        with open(self.prev_result) as f:
+            for line in f:
+                arr = line.split(",")
+                if arr < 2:
+                    break
+                ni = [di[int(m)] for m in arr]
+                clusters.append(ni)
+                indexes += ni
+        assert len(set(indexes)) == len(self.ids), \
+            "ids count: {}, index count: {}".format(len(self.ids),
+                                                    len(set(indexes)))
+        count = len(clusters)
+        assert (count & (count - 1)) == 0, \
+            "Prev cluster count: {}".format(count)
+        for i, ni in enumerate(clusters):
+            queue.put((i + count - 1, np.array(ni)))
+        return True
+
+    def _train(self, pipe, queue):
+        last_size = -1
+        catch_time = 0
+        processed = False
+        code = np.zeros((len(self.ids), ), dtype=np.int64)
+        while True:
+            for _ in range(3):
+                try:
+                    pcode, index = queue.get(timeout=self.timeout)
+                except:
+                    index = None
+                if index is not None:
+                    break
+
+            if index is None:
+                if processed and (last_size <= self.mini_batch or
+                                  catch_time >= 3):
+                    print("Process {} exits".format(os.getpid()))
+                    break
+                else:
+                    print("Got empty job, pid: {}, time: {}".format(os.getpid(
+                    ), catch_time))
+                    catch_time += 1
+                    continue
+
+            processed = True
+            catch_time = 0
+            last_size = len(index)
+            if last_size <= self.mini_batch:
+                self._minbatch(pcode, index, code)
+            else:
+                start = time.time()
+                sub_index = self._cluster(index)
+                if last_size > self.mini_batch:
+                    print("Train iteration done, pcode:{}, "
+                          "data size: {}, elapsed time: {}"
+                          .format(pcode, len(index), time.time() - start))
+                self.timeout = int(0.4 * self.timeout + 0.6 * (time.time() -
+                                                               start))
+                if self.timeout < 5:
+                    self.timeout = 5
+
+                for i in range(self.n_clusters):
+                    if len(sub_index[i]) > 1:
+                        queue.put(
+                            (self.n_clusters * pcode + i + 1, sub_index[i]))
+
+        process_count = 0
+        for c in code:
+            if c > 0:
+                process_count += 1
+        print("Process {} process {} items".format(os.getpid(), process_count))
+        pipe.send(code)
+
+    def _minbatch(self, pcode, index, code):
+        dq = collections.deque()
+        dq.append((pcode, index))
+        batch_size = len(index)
+        tstart = time.time()
+        while dq:
+            pcode, index = dq.popleft()
+            if len(index) <= self.n_clusters:
+                for i in range(len(index)):
+                    code[index[i]] = self.n_clusters * pcode + i + 1
+                continue
+
+            sub_index = self._cluster(index)
+            for i in range(self.n_clusters):
+                if len(sub_index[i]) > 1:
+                    dq.append((self.n_clusters * pcode + i + 1, sub_index[i]))
+                elif len(sub_index[i]) > 0:
+                    for j in range(len(sub_index[i])):
+                        code[sub_index[i][j]] = self.n_clusters * \
+                            pcode + i + j + 1
+        print("Minbatch, batch size: {}, elapsed: {}".format(
+            batch_size, time.time() - tstart))
+
+    def _cluster(self, index):
+        data = self.data[index]
+        kmeans = KMeans(n_clusters=self.n_clusters, random_state=0).fit(data)
+        labels = kmeans.labels_
+        sub_indexes = []
+        remain_index = []
+        ave_num = len(index) / self.n_clusters
+
+        for i in range(self.n_clusters):
+            sub_i = np.where(labels == i)[0]
+            sub_index = index[sub_i]
+            if len(sub_index) <= ave_num:
+                sub_indexes.append(sub_index)
+            else:
+                distances = kmeans.transform(data[sub_i])[:, i]
+                sorted_index = sub_index[np.argsort(distances)]
+                sub_indexes.append(sorted_index[:ave_num])
+                remain_index.extend(list(sorted_index[ave_num:]))
+        idx = 0
+        while idx < self.n_clusters and len(remain_index) > 0:
+            if len(sub_indexes[idx]) >= ave_num:
+                idx += 1
+            else:
+                diff = min(len(remain_index), ave_num - len(sub_indexes[idx]))
+                sub_indexes[idx] = np.append(sub_indexes[idx],
+                                             np.array(remain_index[0:diff]))
+                remain_index = remain_index[diff:]
+                idx += 1
+        if len(remain_index) > 0:
+            sub_indexes[0] = np.append(sub_indexes[0], np.array(remain_index))
+
+        return sub_indexes
+
+    def _cluster1(self, index):
+        pass
+
+    def _rebalance(self, lindex, rindex, distances):
+        sorted_index = rindex[np.argsort(distances)]
+        idx = np.concatenate((lindex, sorted_index))
+        mid = int(len(idx) / 2)
+        return idx[mid:], idx[:mid]
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Tree cluster")
+    parser.add_argument(
+        "--embed_file",
+        required=True,
+        help="filename of the embedded vector file")
+    parser.add_argument(
+        "--emb_size",
+        type=int,
+        default=64,
+        help="dimension of input embedded vector")
+    parser.add_argument(
+        "--id_offset",
+        default=None,
+        help="id offset of the generated tree internal node")
+    parser.add_argument(
+        "--parall",
+        type=int,
+        default=16,
+        help="Parall execution process number")
+    parser.add_argument(
+        "--prev_result",
+        default=None,
+        help="filename of the previous cluster reuslt")
+
+    argments = parser.parse_args()
+    t1 = time.time()
+    cluster = Cluster(argments.embed_file, argments.emb_size,
+                      argments.id_offset, argments.parall,
+                      argments.prev_result)
+    cluster.train()
+    t2 = time.time()
+    print("Train complete successfully, elapsed: {}".format(t2 - t1))
diff --git a/models/treebased/tdm/gen_tree/emb_util.py b/models/treebased/tdm/gen_tree/emb_util.py
new file mode 100644
index 0000000000000000000000000000000000000000..2a4c200944e75a05b04a6dc219285428f958ed8d
--- /dev/null
+++ b/models/treebased/tdm/gen_tree/emb_util.py
@@ -0,0 +1,73 @@
+# -*- coding=utf8 -*-
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import paddle
+import paddle.fluid as fluid
+import numpy as np
+import json
+import argparse
+
+parser = argparse.ArgumentParser()
+parser.add_argument(
+    "--mode",
+    default="create_fake_emb",
+    choices=["create_fake_emb", "save_item_emb"],
+    type=str,
+    help=".")
+parser.add_argument("--emb_id_nums", default=13, type=int, help=".")
+parser.add_argument("--emb_shape", default=64, type=int, help=".")
+parser.add_argument("--emb_path", default='./item_emb.txt', type=str, help='.')
+args = parser.parse_args()
+
+
+def create_fake_emb(emb_id_nums, emb_shape, emb_path):
+    x = fluid.data(name="item", shape=[1], lod_level=1, dtype="int64")
+
+    # use layers.embedding to init emb value
+    item_emb = fluid.layers.embedding(
+        input=x,
+        is_sparse=True,
+        size=[emb_id_nums, emb_shape],
+        param_attr=fluid.ParamAttr(
+            name="Item_Emb",
+            initializer=fluid.initializer.TruncatedNormal(
+                loc=0.0, scale=2.0)))
+
+    # run startup to init emb tensor
+    exe = fluid.Executor(fluid.CPUPlace())
+    exe.run(fluid.default_startup_program())
+
+    # get np.array(emb_tensor)
+    print("Get Emb")
+    item_emb_array = np.array(fluid.global_scope().find_var("Item_Emb")
+                              .get_tensor())
+    with open(emb_path, 'w+') as f:
+        emb_str = ""
+        for index, value in enumerate(item_emb_array):
+            line = []
+            for v in value:
+                line.append(str(v))
+            line_str = " ".join(line)
+            line_str += "\t"
+            line_str += str(index)
+            line_str += "\n"
+            emb_str += line_str
+        f.write(emb_str)
+    print("Item Emb write Finish")
+
+
+if __name__ == "__main__":
+    create_fake_emb(args.emb_id_nums, args.emb_shape, args.emb_path)
diff --git a/models/treebased/tdm/gen_tree/gen_tree.py b/models/treebased/tdm/gen_tree/gen_tree.py
new file mode 100644
index 0000000000000000000000000000000000000000..cb75d7a3c40820bcb812c51b17b65ec009f230f9
--- /dev/null
+++ b/models/treebased/tdm/gen_tree/gen_tree.py
@@ -0,0 +1,52 @@
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import argparse
+from cluster import Cluster
+import time
+import argparse
+from tree_search_util import tree_search_main
+parser = argparse.ArgumentParser()
+parser.add_argument("--emd_path", default='', type=str, help=".")
+parser.add_argument("--emb_size", default=64, type=int, help=".")
+parser.add_argument("--threads", default=1, type=int, help=".")
+parser.add_argument("--n_clusters", default=3, type=int, help=".")
+parser.add_argument("--output_dir", default='', type=str, help='.')
+args = parser.parse_args()
+
+
+def main():
+    cur_time = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))
+    if not os.path.exists(args.output_dir):
+        os.system("mkdir -p " + args.output_dir)
+    print('%s start build tree' % cur_time)
+    # 1. Tree clustering, generating two files in current directory, tree.pkl, id2item.json
+    cluster = Cluster(
+        args.emd_path,
+        args.emb_size,
+        parall=args.threads,
+        output_dir=args.output_dir,
+        _n_clusters=args.n_clusters)
+    cluster.train()
+
+    # 2. Tree searching, generating tree_info, travel_list, layer_list for train process.
+    tree_search_main(
+        os.path.join(args.output_dir, "tree.pkl"),
+        os.path.join(args.output_dir, "id2item.json"), args.output_dir,
+        args.n_clusters)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/models/treebased/tdm/gen_tree/tree_builder.py b/models/treebased/tdm/gen_tree/tree_builder.py
new file mode 100644
index 0000000000000000000000000000000000000000..2fd73340e957942039d182c9b2624ff0431c89de
--- /dev/null
+++ b/models/treebased/tdm/gen_tree/tree_builder.py
@@ -0,0 +1,46 @@
+# Copyright (C) 2016-2018 Alibaba Group Holding Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import print_function
+import numpy as np
+
+import sys
+import os
+import codecs
+from tree_impl import _build
+
+_CUR_DIR = os.path.dirname(os.path.realpath(__file__))
+sys.path.append(os.path.join(_CUR_DIR, ".."))
+
+
+class TreeBuilder:
+    def __init__(self, output_dir='./', n_clusters=2):
+        self.output_dir = output_dir
+        self.n_clusters = n_clusters
+
+    def build(
+            self,
+            ids,
+            codes,
+            data=None,
+            items=None,
+            id_offset=None, ):
+        _build(ids, codes, data, items, self.output_dir, self.n_clusters)
+
+    def _ancessors(self, code):
+        ancs = []
+        while code > 0:
+            code = int((code - 1) / 2)
+            ancs.append(code)
+        return ancs
diff --git a/models/treebased/tdm/gen_tree/tree_impl.py b/models/treebased/tdm/gen_tree/tree_impl.py
new file mode 100644
index 0000000000000000000000000000000000000000..39b423d2bd5575c40ad3a4b709deca85916eb4e8
--- /dev/null
+++ b/models/treebased/tdm/gen_tree/tree_impl.py
@@ -0,0 +1,122 @@
+# Copyright (C) 2016-2018 Alibaba Group Holding Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from anytree import NodeMixin, RenderTree
+import numpy as np
+from anytree.exporter.dictexporter import DictExporter
+import pickle
+import json
+import os
+import time
+
+
+class BaseClass(object):
+    pass
+
+
+class TDMTreeClass(BaseClass, NodeMixin):
+    def __init__(self,
+                 key_code,
+                 emb_vec,
+                 ids=None,
+                 text=None,
+                 parent=None,
+                 children=None):
+        super(TDMTreeClass, self).__init__()
+        self.key_code = key_code
+        self.ids = ids
+        self.emb_vec = emb_vec
+        self.text = text
+        self.parent = parent
+        if children:
+            self.children = children
+
+    def set_parent(self, parent):
+        self.parent = parent
+
+    def set_children(self, children):
+        self.children = children
+
+
+def _build(ids, codes, data, items, output_dir, n_clusters=2):
+    code_list = [0] * 50000000
+    node_dict = {}
+    max_code = 0
+    id2item = {}
+    curtime = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))
+    print('%s start gen code_list' % curtime)
+    for _id, code, datum, item in zip(ids, codes, data, items):
+        code_list[code] = [datum, _id]
+        id2item[str(_id)] = item
+        max_code = max(code, max_code)
+        ancessors = _ancessors(code, n_clusters)
+        for ancessor in ancessors:
+            code_list[ancessor] = [[]]
+
+    for code in range(max_code, -1, -1):
+        if code_list[code] == 0:
+            continue
+        if len(code_list[code]) > 1:
+            pass
+        elif len(code_list[code]) == 1:
+            code_list[code][0] = np.mean(code_list[code][0], axis=0)
+        if code > 0:
+            ancessor = int((code - 1) / n_clusters)
+            code_list[ancessor][0].append(code_list[code][0])
+
+    print('start gen node_dict')
+    for code in range(0, max_code + 1):
+        if code_list[code] == 0:
+            continue
+        if len(code_list[code]) > 1:
+            [datum, _id] = code_list[code]
+            node_dict[code] = TDMTreeClass(code, emb_vec=datum, ids=_id)
+        elif len(code_list[code]) == 1:
+            [datum] = code_list[code]
+            node_dict[code] = TDMTreeClass(code, emb_vec=datum)
+        if code > 0:
+            ancessor = int((code - 1) / n_clusters)
+            node_dict[code].set_parent(node_dict[ancessor])
+
+    save_tree(node_dict[0], os.path.join(output_dir, 'tree.pkl'))
+    save_dict(id2item, os.path.join(output_dir, 'id2item.json'))
+
+
+def render(root):
+    for row in RenderTree(root, childiter=reversed):
+        print("%s%s" % (row.pre, row.node.text))
+
+
+def save_tree(root, path):
+    print('save tree to %s' % path)
+    exporter = DictExporter()
+    data = exporter.export(root)
+    f = open(path, 'wb')
+    pickle.dump(data, f)
+    f.close()
+
+
+def save_dict(dic, filename):
+    """save dict into json file"""
+    print('save dict to %s' % filename)
+    with open(filename, "w") as json_file:
+        json.dump(dic, json_file, ensure_ascii=False)
+
+
+def _ancessors(code, n_clusters):
+    ancs = []
+    while code > 0:
+        code = int((code - 1) / n_clusters)
+        ancs.append(code)
+    return ancs
diff --git a/models/treebased/tdm/gen_tree/tree_search_util.py b/models/treebased/tdm/gen_tree/tree_search_util.py
new file mode 100644
index 0000000000000000000000000000000000000000..9ef612f7a65a33c2e2e80a95de05da739403883e
--- /dev/null
+++ b/models/treebased/tdm/gen_tree/tree_search_util.py
@@ -0,0 +1,206 @@
+# -*- coding=utf8 -*-
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import json
+import pickle
+import time
+import os
+import numpy as np
+
+from anytree import (AsciiStyle, LevelOrderGroupIter, LevelOrderIter, Node,
+                     NodeMixin, RenderTree)
+from anytree.importer.dictimporter import DictImporter
+from anytree.iterators.abstractiter import AbstractIter
+from anytree.walker import Walker
+from tree_impl import TDMTreeClass
+
+
+class myLevelOrderIter(AbstractIter):
+    @staticmethod
+    def _iter(children, filter_, stop, maxlevel):
+        level = 1
+        while children:
+            next_children = []
+            for child in children:
+                if filter_(child):
+                    yield child, level
+                next_children += AbstractIter._get_children(child.children,
+                                                            stop)
+            children = next_children
+            level += 1
+            if AbstractIter._abort_at_level(level, maxlevel):
+                break
+
+
+class Tree_search(object):
+    def __init__(self, tree_path, id2item_path, child_num=2):
+        self.root = None
+        self.id2item = None
+        self.item2id = None
+        self.child_num = child_num
+
+        self.load(tree_path)
+        # self.load_id2item(id2item_path)
+
+        self.level_code = [[]]
+        self.max_level = 0
+        self.keycode_id_dict = {}
+        #  embedding
+        self.keycode_nodeid_dict = {}
+        self.tree_info = []
+        self.id_node_dict = {}
+
+        self.get_keycode_mapping()
+        self.travel_tree()
+        self.get_children()
+
+    def get_keycode_mapping(self):
+        nodeid = 0
+        self.embedding = []
+        print("Begin Keycode Mapping")
+        for node in myLevelOrderIter(self.root):
+            node, level = node
+            if level - 1 > self.max_level:
+                self.max_level = level - 1
+                self.level_code.append([])
+            if node.ids is not None:
+                self.keycode_id_dict[node.key_code] = node.ids
+                self.id_node_dict[node.ids] = node
+            self.keycode_nodeid_dict[node.key_code] = nodeid
+            self.level_code[self.max_level].append(nodeid)
+
+            node_infos = []
+            if node.ids is not None:  # item_id
+                node_infos.append(node.ids)
+            else:
+                node_infos.append(0)
+            node_infos.append(self.max_level)  # layer_id
+            if node.parent:  # ancestor_id
+                node_infos.append(self.keycode_nodeid_dict[
+                    node.parent.key_code])
+            else:
+                node_infos.append(0)
+            self.tree_info.append(node_infos)
+            self.embedding.append(node.emb_vec)
+            nodeid += 1
+            if nodeid % 1000 == 0:
+                print("travel node id {}".format(nodeid))
+
+    def load(self, path):
+        print("Begin Load Tree")
+        f = open(path, "rb")
+        data = pickle.load(f)
+        pickle.dump(data, open(path, "wb"), protocol=2)
+        importer = DictImporter()
+        self.root = importer.import_(data)
+        f.close()
+
+    def load_id2item(self, path):
+        """load dict from json file"""
+        with open(path, "rb") as json_file:
+            self.id2item = json.load(json_file)
+
+        self.item2id = {value: int(key) for key, value in self.id2item.items()}
+
+    def get_children(self):
+        """get every node children info"""
+        print("Begin Keycode Mapping")
+        for node in myLevelOrderIter(self.root):
+            node, level = node
+            node_id = self.keycode_nodeid_dict[node.key_code]
+            child_idx = 0
+            if node.children:
+                for child in node.children:
+                    self.tree_info[node_id].append(self.keycode_nodeid_dict[
+                        child.key_code])
+                    child_idx += 1
+            while child_idx < self.child_num:
+                self.tree_info[node_id].append(0)
+                child_idx += 1
+            if node_id % 1000 == 0:
+                print("get children  node id {}".format(node_id))
+
+    def travel_tree(self):
+        self.travel_list = []
+        tree_walker = Walker()
+        print("Begin Travel Tree")
+        for item in sorted(self.id_node_dict.keys()):
+            node = self.id_node_dict[int(item)]
+            paths, _, _ = tree_walker.walk(node, self.root)
+            paths = list(paths)
+            paths.reverse()
+            travel = [self.keycode_nodeid_dict[i.key_code] for i in paths]
+            while len(travel) < self.max_level:
+                travel.append(0)
+            self.travel_list.append(travel)
+
+
+def tree_search_main(tree_path, id2item_path, output_dir, n_clusters=2):
+    print("Begin Tree Search")
+    t = Tree_search(tree_path, id2item_path, n_clusters)
+
+    # 1. Walk all leaf nodes, get travel path array
+    travel_list = np.array(t.travel_list)
+    np.save(os.path.join(output_dir, "travel_list.npy"), travel_list)
+    with open(os.path.join(output_dir, "travel_list.txt"), 'w') as fout:
+        for i, travel in enumerate(t.travel_list):
+            travel = map(str, travel)
+            fout.write(','.join(travel))
+            fout.write("\n")
+    print("End Save tree travel")
+
+    # 2. Walk all layer of tree, get layer array
+    layer_num = 0
+    with open(os.path.join(output_dir, "layer_list.txt"), 'w') as fout:
+        for layer in t.level_code:
+            # exclude layer 0
+            if layer_num == 0:
+                layer_num += 1
+                continue
+            for idx in range(len(layer) - 1):
+                fout.write(str(layer[idx]) + ',')
+            fout.write(str(layer[-1]) + "\n")
+            print("Layer {} has {} node, the first {}, the last {}".format(
+                layer_num, len(layer), layer[0], layer[-1]))
+            layer_num += 1
+    print("End Save tree layer")
+
+    # 3. Walk all node of tree, get tree info
+    tree_info = np.array(t.tree_info)
+    np.save(os.path.join(output_dir, "tree_info.npy"), tree_info)
+    with open(os.path.join(output_dir, "tree_info.txt"), 'w') as fout:
+        for i, node_infos in enumerate(t.tree_info):
+            node_infos = map(str, node_infos)
+            fout.write(','.join(node_infos))
+            fout.write("\n")
+    print("End Save tree info")
+
+    # 4. save embedding
+    embedding = np.array(t.embedding)
+    np.save(os.path.join(output_dir, "tree_emb.npy"), embedding)
+    with open(os.path.join(output_dir, "tree_embedding.txt"), "w") as fout:
+        for i, emb in enumerate(t.embedding):
+            emb = map(str, emb)
+            fout.write(','.join(emb))
+            fout.write("\n")
+
+
+if __name__ == "__main__":
+    tree_path = "./tree.pkl"
+    id2item_path = "./id2item.json"
+    output_dir = "./output"
+    if not os.path.exists(output_dir):
+        os.system("mkdir -p " + output_dir)
+    tree_search_main(tree_path, id2item_path, output_dir)
diff --git a/run.py b/run.py
index c916ecd0ab3b0efe71ef86a4bf1d7f357aa9d563..8d21c43fbc85b5084963bfc9d495b4a3dc2702aa 100755
--- a/run.py
+++ b/run.py
@@ -348,6 +348,7 @@ def cluster_engine(args):
 
         cluster_envs["fleet_mode"] = fleet_mode
         cluster_envs["engine_role"] = "WORKER"
+        cluster_envs["log_dir"] = "logs"
         cluster_envs["train.trainer.trainer"] = trainer
         cluster_envs["train.trainer.engine"] = "cluster"
         cluster_envs["train.trainer.executor_mode"] = executor_mode