initial commit to github

AUTHORS.md

 | Github account | name |
 |---|---|
-| guru4elephant | Daxiang Dong |
\ No newline at end of file
+| guru4elephant | Daxiang Dong |
+| frankwhzhang | Wenhui Zhang |
\ No newline at end of file

README.md

 # PaddleFL
-Federated Deep Learning in PaddlePaddle
+
+PaddleFL is an open source federated learning framework based on PaddlePaddle. Researchers can easily replicate and compare different federated learning algorithms with PaddleFL. Developers can also benefit from PaddleFL in that it is easy to deploy a federated learning system in large scale distributed clusters. In PaddleFL, serveral federated learning strategies will be provided with application in computer vision, natural language processing, recommendation and so on. Application of traditional machine learning training strategies such as Multi-task learning, Transfer Learning in Federated Learning settings will be provided. Based on PaddlePaddle's large scale distributed training and elastic scheduling of training job on Kubernetes, PaddleFL can be easily deployed based on full-stack open sourced software.
+
+## Federated Learning
+
+Data is becoming more and more expensive nowadays, and sharing of raw data is very hard across organizations. Federated Learning aims to solve the problem of data isolation and secure sharing of data knowledge among organizations. The concept of federated learning is proposed by researchers in Google [1, 2, 3]. 
+
+## Overview of PaddleFL
+
+<img src='images/FL-framework.png' width = "1300" height = "310" align="middle"/>
+
+In PaddleFL, horizontal and vertical federated learning strategies will be implemented according to the categorization given in [4]. Application demonstrations in natural language processing, computer vision and recommendation will be provided in PaddleFL. 
+
+#### Federated Learning Strategy
+
+- **Vertical Federated Learning**: Logistic Regression with PrivC, Neural Network with third-party PrivC [5]
+
+- **Horizontal Federated Learning**: Federated Averaging [2], Differential Privacy [6]
+
+#### Training Strategy
+
+- **Multi Task Learning** [7]
+
+- **Transfer Learning** [8]
+
+- **Active Learning**
+
+
+## Framework design of PaddleFL
+
+<img src='images/FL-training.png' width = "1300" height = "310" align="middle"/>
+
+In PaddleFL, components for defining a federated learning task and training a federated learning job are as follows:
+
+#### Compile Time
+
+- **FL-Strategy**: a user can define federated learning strategies with FL-Strategy such as Fed-Avg[1]
+
+- **User-Defined-Program**: PaddlePaddle's program that defines the machine learning model structure and training strategies such as multi-task learning.
+
+- **Distributed-Config**: In federated learning, a system should be deployed in distributed settings. Distributed Training Config defines distributed training node information.
+
+- **FL-Job-Generator**: Given FL-Strategy, User-Defined Program and Distributed Training Config, FL-Job for federated server and worker will be generated through FL Job Generator. FL-Jobs will be sent to organizations and federated parameter server for run-time execution.
+
+#### Run Time
+
+- **FL-Server**: federated parameter server that usually runs in cloud or third-party clusters.
+
+- **FL-Worker**: Each organization participates in federated learning will have one or more federated workers that will communicate with the federated parameter server.
+
+## Install Guide
+
+``` shell
+python setup.py install
+python -c "import paddle_fl as fl"
+```
+
+## Quick-Start Example
+
+``` shell
+cd paddle_fl/demo
+python fl_master.py
+python fl_server.py 2> server0.errlog > server0.stdlog &
+python fl_trainer.py 0 2> trainer0.errlog > trainer0.stdlog &
+python fl_trainer.py 1 2> trainer0.errlog > trainer0.stdlog &
+```
+
+## Benchmark task
+
+Gru4Rec [9] introduces recurrent neural network model in session-based recommendation. PaddlePaddle's Gru4Rec implementation is in https://github.com/PaddlePaddle/models/tree/develop/PaddleRec/gru4rec. 
+
+## On Going and Future Work
+
+- Experimental benchmark with public datasets in federated learning settings.
+
+- Federated Learning Systems deployment methods in Kubernetes.
+
+- Vertical Federated Learning Strategies and more horizontal federated learning strategies will be open sourced.
+
+## Reference
+
+[1]. Jakub Konečný, H. Brendan McMahan, Daniel Ramage, Peter Richtárik. **Federated Optimization: Distributed Machine Learning for On-Device Intelligence.** 2016
+
+[2]. H. Brendan McMahan, Eider Moore, Daniel Ramage, Blaise Agüera y Arcas. **Federated Learning of Deep Networks using Model Averaging.** 2017
+
+[3]. Jakub Konečný, H. Brendan McMahan, Felix X. Yu, Peter Richtárik, Ananda Theertha Suresh, Dave Bacon. **Federated Learning: Strategies for Improving Communication Efficiency.** 2016
+
+[4]. Qiang Yang, Yang Liu, Tianjian Chen, Yongxin Tong. **Federated Machine Learning: Concept and Applications.** 2019
+
+[5]. Kai He, Liu Yang, Jue Hong, Jinghua Jiang, Jieming Wu, Xu Dong et al. **PrivC  - A framework for efficient Secure Two-Party Computation. In Proceedings of 15th EAI International Conference on Security and Privacy in Communication Networks.** SecureComm 2019
+
+[6]. Martín Abadi, Andy Chu, Ian Goodfellow, H. Brendan McMahan, Ilya Mironov, Kunal Talwar, Li Zhang. **Deep Learning with Differential Privacy.** 2016
+
+[7]. Virginia Smith, Chao-Kai Chiang, Maziar Sanjabi, Ameet Talwalkar. **Federated Multi-Task Learning** 2016
+
+[8]. Yang Liu, Tianjian Chen, Qiang Yang. **Secure Federated Transfer Learning.** 2018
+
+[9]. Balázs Hidasi, Alexandros Karatzoglou, Linas Baltrunas, Domonkos Tikk. **Session-based Recommendations with Recurrent Neural Networks.** 2016
\ No newline at end of file

README_cn.md

+# PaddleFL
+
+PaddleFL是一个基于PaddlePaddle的开源联邦学习框架。研究人员可以很轻松地用PaddleFL复制和比较不同的联邦学习算法。开发人员也可以从padderFL中获益，因为用PaddleFL在大规模分布式集群中部署联邦学习系统很容易。PaddleFL提供了很多联邦学习策略及其在计算机视觉、自然语言处理、推荐算法等领域的应用。此外，PaddleFL还将提供传统机器学习训练策略的应用，例如多任务学习、联邦学习环境下的转移学习。依靠着PaddlePaddle的大规模分布式训练和Kubernetes的训练工作弹性调度，PaddleFL可以基于全栈开源软件轻松地部署。
+
+## 联邦学习
+
+如今，数据变得越来越昂贵，而且跨组织共享原始数据非常困难。联合学习旨在解决组织间数据隔离和数据知识安全共享的问题。联邦学习的概念是由谷歌的研究人员提出的[1，2，3]。
+
+## PaddleFL概述
+
+<img src='images/FL-framework.png' width = "1300" height = "310" align="middle"/>
+
+在padderfl中，水平和垂直联合学习策略将根据[4]中给出的分类来实现。PaddleFL也将提供在自然语言处理，计算机视觉和推荐算法等领域的应用演示。
+
+#### 联邦学习策略
+
+- **垂直联邦学习**: 带privc的逻辑回归，带第三方privc的神经网络[5]
+
+- **水平联邦学习**: 联邦平均 [2]，差分隐私 [6]
+
+#### 训练策略
+
+- **多任务学习** [7]
+
+- **迁移学习** [8]
+
+- **主动学习**
+
+
+## PaddleFL框架设计
+
+<img src='images/FL-training.png' width = "1300" height = "310" align="middle"/>
+
+在PadderFL中，用于定义联邦学习任务和联邦学习训练工作的组件如下：
+
+#### 编译时
+
+- **FL-Strategy**: 用户可以使用FL-Strategy定义联邦学习策略，例如Fed-Avg[1]。
+
+- **User-Defined-Program**: PaddlePaddle的程序定义了机器学习模型结构和训练策略，如多任务学习。
+
+- **Distributed-Config**: 在联邦学习中，系统应该部署在分布式环境中。分布式训练配置定义分布式训练节点信息。
+
+- **FL-Job-Generator**: 给定FL-Strategy, User-Defined Program 和 Distributed Training Config，联邦服务端和工作端的FL-Job将通过FL Job Generator生成。FL-Jobs 被发送到组织和联邦参数服务器以进行运行时执行。
+
+#### 运行时
+
+- **FL-Server**: 在云或第三方集群中运行的联邦参数服务器。
+
+- **FL-Worker**: 参与联合学习的每个组织都将有一个或多个与联合参数服务器通信的联合工作者。
+
+## 安装指南
+
+``` shell
+python setup.py install
+python -c "import paddle_fl as fl"
+```
+
+## 快速入门
+
+``` shell
+cd paddle_fl/demo
+python fl_master.py
+python fl_server.py 2> server0.errlog > server0.stdlog &
+python fl_trainer.py 0 2> trainer0.errlog > trainer0.stdlog &
+python fl_trainer.py 1 2> trainer0.errlog > trainer0.stdlog &
+```
+
+## 性能测试
+
+Gru4Rec [9] 在基于会话的推荐中引入了递归神经网络模型。PaddlePaddle的GRU4RC实现代码在 https://github.com/PaddlePaddle/models/tree/develop/PaddleRec/gru4rec. 
+
+## 正在进行与发展方向
+
+- 联邦学习在公共数据集上的实验基准。
+
+- kubernetes中联邦学习系统的部署方法。
+
+- 垂直联合学习策略和更多的水平联合学习策略将是开源的。
+
+## 参考文献
+
+[1]. Jakub Konečný, H. Brendan McMahan, Daniel Ramage, Peter Richtárik. **Federated Optimization: Distributed Machine Learning for On-Device Intelligence.** 2016
+
+[2]. H. Brendan McMahan, Eider Moore, Daniel Ramage, Blaise Agüera y Arcas. **Federated Learning of Deep Networks using Model Averaging.** 2017
+
+[3]. Jakub Konečný, H. Brendan McMahan, Felix X. Yu, Peter Richtárik, Ananda Theertha Suresh, Dave Bacon. **Federated Learning: Strategies for Improving Communication Efficiency.** 2016
+
+[4]. Qiang Yang, Yang Liu, Tianjian Chen, Yongxin Tong. **Federated Machine Learning: Concept and Applications.** 2019
+
+[5]. Kai He, Liu Yang, Jue Hong, Jinghua Jiang, Jieming Wu, Xu Dong et al. **PrivC  - A framework for efficient Secure Two-Party Computation. In Proceedings of 15th EAI International Conference on Security and Privacy in Communication Networks.** SecureComm 2019
+
+[6]. Martín Abadi, Andy Chu, Ian Goodfellow, H. Brendan McMahan, Ilya Mironov, Kunal Talwar, Li Zhang. **Deep Learning with Differential Privacy.** 2016
+
+[7]. Virginia Smith, Chao-Kai Chiang, Maziar Sanjabi, Ameet Talwalkar. **Federated Multi-Task Learning** 2016
+
+[8]. Yang Liu, Tianjian Chen, Qiang Yang. **Secure Federated Transfer Learning.** 2018
+
+[9]. Balázs Hidasi, Alexandros Karatzoglou, Linas Baltrunas, Domonkos Tikk. **Session-based Recommendations with Recurrent Neural Networks.** 2016
\ No newline at end of file

paddle_fl/__init__.py

+# Copyright (c) 2019  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 six
+
+from . import common
+from . import core
+from . import dataset
+from . import reader
+
+

paddle_fl/core/__init__.py

+#   Copyright (c) 2019 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 .master.fl_job import FLCompileTimeJob
+from .master.fl_job import FLRunTimeJob
+from .master.job_generator import JobGenerator
+from .strategy.fl_strategy_base import DPSGDStrategy
+from .strategy.fl_strategy_base import FedAvgStrategy

paddle_fl/core/master/__init__.py

+#   Copyright (c) 2019 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.
+
+

paddle_fl/core/master/fl_job.py

+#   Copyright (c) 2019 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.fluid as fluid
+
+class FLJobBase(object):
+    """
+    FLJobBase is fl job base class, responsible for save and load
+    a federated learning job
+    """
+    def __init__(self):
+        pass
+
+    def _save_str_list(self, items, output):
+        with open(output, "w") as fout:
+            for item in items:
+                fout.write(item + "\n")
+
+    def _load_str_list(self, input_file):
+        res = []
+        with open(input_file, "r") as fin:
+            res.append(fin.readline().strip())
+        return res
+
+    def _save_strategy(self, strategy, output_file):
+        import pickle
+        pickle.dump(strategy, open(output_file, "wb"))
+
+    def _save_endpoints(self, endpoints, output_file):
+        with open(output_file, "w") as fout:
+            for ep in endpoints:
+                fout.write(str(ep) + "\n")
+
+    def _load_endpoints(self, input_file):
+        ep_list = []
+        with open(input_file, "r") as fin:
+            for line in fin:
+                ep_list.append(line.strip())
+        return ep_list
+
+    def _save_program(self, program, output_file):
+        with open(output_file, "wb") as fout:
+            fout.write(program.desc.serialize_to_string())
+
+    def _save_readable_program(self, program, output_file):
+        with open(output_file, "w") as fout:
+            fout.write(str(program))
+
+    def _load_program(self, input_file):
+        with open(input_file, "rb") as fin:
+            program_desc_str = fin.read()
+            return fluid.Program.parse_from_string(program_desc_str)
+        return None
+
+class FLCompileTimeJob(FLJobBase):
+    """
+    FLCompileTimeJob is a container for compile time job in federated learning.
+    trainer startup programs, trainer main programs and other trainer programs
+    are in FLCompileTimeJob. Also, server main programs and server startup programs
+    are in this class. FLCompileTimeJob has server endpoints for debugging as well
+    """
+    def __init__(self):
+        self._trainer_startup_programs = []
+        self._trainer_recv_programs = []
+        self._trainer_main_programs = []
+        self._trainer_send_programs = []
+        self._server_startup_programs = []
+        self._server_main_programs = []
+        self._server_endpoints = []
+
+    def set_strategy(self, strategy):
+        self._strategy = strategy
+
+    def set_server_endpoints(self, ps_endpoints):
+        self._server_endpoints = ps_endpoints
+
+    def set_feed_names(self, names):
+        self._feed_names = names
+
+    def set_target_names(self, names):
+        self._target_names = names
+
+    def save(self, folder=None):
+        server_num = len(self._server_startup_programs)
+        trainer_num = len(self._trainer_startup_programs)
+        send_prog_num = len(self._trainer_send_programs)
+        for i in range(server_num):
+            server_folder = "%s/server%d" % (folder, i)
+            os.system("mkdir -p %s" % server_folder)
+            server_startup = self._server_startup_programs[i]
+            server_main = self._server_main_programs[i]
+            self._save_program(
+                server_startup,
+                "%s/server.startup.program" % server_folder)
+            self._save_program(
+                server_main,
+                "%s/server.main.program" % server_folder)
+            self._save_readable_program(
+                server_startup,
+                "%s/server.startup.program.txt" % server_folder)
+            self._save_readable_program(
+                server_main,
+                "%s/server.main.program.txt" % server_folder)
+
+        for i in range(trainer_num):
+            trainer_folder = "%s/trainer%d" % (folder, i)
+            os.system("mkdir -p %s" % trainer_folder)
+            trainer_startup = self._trainer_startup_programs[i]
+            trainer_main = self._trainer_main_programs[i]
+            self._save_program(
+                trainer_startup,
+                "%s/trainer.startup.program" % trainer_folder)
+            self._save_program(
+                trainer_main,
+                "%s/trainer.main.program" % trainer_folder)
+            self._save_readable_program(
+                trainer_startup,
+                "%s/trainer.startup.program.txt" % trainer_folder)
+            self._save_readable_program(
+                trainer_main,
+                "%s/trainer.main.program.txt" % trainer_folder)
+
+        for i in range(send_prog_num):
+            trainer_folder = "%s/trainer%d" % (folder, i)
+            trainer_send = self._trainer_send_programs[i]
+            trainer_recv = self._trainer_recv_programs[i]
+            self._save_program(
+                trainer_send,
+                "%s/trainer.send.program" % trainer_folder)
+            self._save_program(
+                trainer_recv,
+                "%s/trainer.recv.program" % trainer_folder)
+            self._save_readable_program(
+                trainer_send,
+                "%s/trainer.send.program.txt" % trainer_folder)
+            self._save_readable_program(
+                trainer_recv,
+                "%s/trainer.recv.program.txt" % trainer_folder)
+
+        self._save_str_list(self._feed_names,
+                            "%s/feed_names" % folder)
+
+        self._save_str_list(self._target_names,
+                            "%s/target_names" % folder)
+
+        self._save_endpoints(self._server_endpoints,
+                            "%s/endpoints" % folder)
+
+        self._save_strategy(self._strategy,
+                           "%s/strategy.pkl" % folder)
+
+class FLRunTimeJob(FLJobBase):
+    """
+    FLRunTimeJob is a contrainer for run time job in federated leanring.
+    A trainer or a server can load FLRunTimeJob. Only necessary programs
+     can be loaded in FLRunTimeJob
+    """
+    def __init__(self):
+        self._trainer_startup_program = None
+        self._trainer_recv_program = None
+        self._trainer_main_program = None
+        self._trainer_send_program = None
+        self._server_startup_program = None
+        self._server_main_program = None
+        self._feed_names = None
+        self._target_names = None
+
+    def _load_strategy(self, input_file):
+        import pickle
+        return pickle.load(open(input_file, "rb"))
+
+    def load_trainer_job(self, folder=None, trainer_id=0):
+        """
+        Load trainer job given training folder and trainer id
+        Currently, a trainer_id is assigned to a trainer node, and
+        corresponding FL Job will be sent to the trainer node.
+
+        Args:
+            folder(str): FL Job folder name
+            trainer_id(int): trainer index for current job
+
+        Return:
+            None
+        """
+        folder_name = "%s/trainer%d" % (folder, trainer_id)
+        startup_fn = "%s/trainer.startup.program" % folder_name
+        self._trainer_startup_program = self._load_program(startup_fn)
+
+        main_fn = "%s/trainer.main.program" % folder_name
+        self._trainer_main_program = self._load_program(main_fn)
+        
+        send_fn = "%s/trainer.send.program" % folder_name
+        self._trainer_send_program = self._load_program(send_fn)
+
+        recv_fn = "%s/trainer.recv.program" % folder_name
+        self._trainer_recv_program = self._load_program(recv_fn)
+
+        endpoints_fn = "%s/endpoints" % folder
+        self._endpoints = self._load_endpoints(endpoints_fn)
+
+        strategy_fn = "%s/strategy.pkl" % folder
+        self._strategy = self._load_strategy(strategy_fn)
+
+        feed_names_fn = "%s/feed_names" % folder
+        self._feed_names = self._load_str_list(feed_names_fn)
+
+        target_names_fn = "%s/target_names" % folder
+        self._target_names = self._load_str_list(target_names_fn)
+
+    def load_server_job(self, folder=None, server_id=0):
+        """
+        Load server job given training folder and server_id
+        Currently, a server_id is assigned to a server node, and
+        corresponding FL Job will be sent to the server node.
+        
+        Args:
+            folder(str): FL Job folder name
+            server_id(int): server index for current job
+
+        Return:
+            None
+        """
+        folder_name = "%s/server%d" % (folder, server_id)
+        startup_fn = "%s/server.startup.program" % folder_name
+        self._server_startup_program = self._load_program(startup_fn)
+
+        main_fn = "%s/server.main.program" % folder_name
+        self._server_main_program = self._load_program(main_fn)
+
+        endpoints_fn = "%s/endpoints" % folder
+        self._endpoints = self._load_endpoints(endpoints_fn)
+
+        import pickle
+        strategy_fn = "%s/strategy.pkl" % folder
+        self._strategy = self._load_strategy(strategy_fn)

paddle_fl/core/master/job_generator.py

+#   Copyright (c) 2019 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 paddle.fluid as fluid
+from .fl_job import FLCompileTimeJob
+
+class JobGenerator(object):
+    """
+    A JobGenerator is responsible for generating distributed federated
+    learning configs. Before federated learning job starts, organizations
+    need to define a deep learning model together to do horizontal federated
+    learning.
+    """
+    def __init__(self):
+        # worker num for federated learning
+        self._worker_num = 0
+        # startup program
+        self._startup_prog = None
+        # inner optimizer
+        self._optimizer = \
+            fluid.optimizer.SGD(learning_rate=0.001)
+
+
+    def set_optimizer(self, optimizer):
+        """
+        Set optimizer of current job
+        """
+        self._optimizer = optimizer
+
+    def set_losses(self, losses):
+        """
+        Set losses of current job
+        losses can be a list of loss so that we can do
+        optimization on multiple losses
+        """
+        self._losses = losses
+
+    def set_startup_program(self, startup=None):
+        """
+        set startup program for user defined program
+        """
+        if startup == None:
+            startup = fluid.default_startup_program()
+        self._startup_prog = startup
+
+    def set_infer_feed_and_target_names(self, feed_names, target_names):
+        self._feed_names = feed_names
+        self._target_names = target_names
+
+    def generate_fl_job(self,
+                        fl_strategy,
+                        server_endpoints=[],
+                        worker_num=1,
+                        output=None):
+
+        """
+        Generate Federated Learning Job, based on user defined configs
+
+        Args:
+            fl_strategy(FLStrategyBase): federated learning strategy defined by current federated users
+            server_endpoints(List(str)): endpoints for federated server nodes
+            worker_num(int): number of training nodes
+            output(str): output directory of generated fl job
+
+        Returns:
+            None
+
+        Examples:
+            import paddle.fluid as fluid
+            import paddle_fl as fl
+            from paddle_fl.core.master.job_generator import JobGenerator
+            from paddle_fl.core.strategy.fl_strategy_base import FLStrategyFactory
+
+            input_x = fluid.layers.data(name="input_x", shape=[10], dtype="float32")
+            label = fluid.layers.data(name="label", shape[1], dtype="int64")
+            fc0 = fluid.layers.fc(input=input_x, size=2, act='sigmoid')
+            cost = fluid.layers.cross_entropy(input=fc0, label=label)
+            loss = fluid.layers.reduce_mean(cost)
+
+            job_generator = JobGenerator()
+            optimizer = fluid.optimizer.SGD(learning_rate=0.1)
+            job_generator.set_optimizer(optimizer)
+            job_generator.set_losses([loss])
+            server_endpoints = [127.0.0.1:8181]
+            worker_num = 10
+            build_strategy = FLStrategyFactor()
+            build_strategy.fed_avg = True
+            strategy = build_strategy.create_fl_strategy()
+            job_output_dir = "fl_job_config"
+            job_generator.generate_fl_job(strategy,
+                                          server_endpoints=server_endpoints,
+                                          worker_num=1,
+                                          output=output)
+        
+        """
+        local_job = FLCompileTimeJob()
+        assert len(self._losses) > 0
+        assert self._startup_prog != None
+        assert fl_strategy != None
+        assert output != None
+        fl_strategy.minimize(self._optimizer, self._losses)
+
+        # strategy can generate startup and main program
+        # of a single worker and servers
+        for trainer_id in range(worker_num):
+            startup_program = self._startup_prog.clone()
+            main_program = self._losses[0].block.program.clone()
+            fl_strategy._build_trainer_program_for_job(
+                trainer_id, program=main_program,
+                ps_endpoints=server_endpoints, trainers=worker_num,
+                sync_mode=True, startup_program=startup_program,
+                job=local_job)
+
+        startup_program = self._startup_prog.clone()
+        main_program = self._losses[0].block.program.clone()
+        fl_strategy._build_server_programs_for_job(
+            program=main_program, ps_endpoints=server_endpoints,
+            trainers=worker_num, sync_mode=True,
+            startup_program=startup_program, job=local_job)
+
+        local_job.set_feed_names(self._feed_names)
+        local_job.set_target_names(self._target_names)
+        local_job.set_strategy(fl_strategy)
+        local_job.save(output)
+

paddle_fl/core/server/__init__.py

+#   Copyright (c) 2019 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.

paddle_fl/core/server/fl_server.py

+#   Copyright (c) 2019 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 paddle.fluid as fluid
+
+class FLServer(object):
+
+    def __init__(self):
+        self._startup_program = None
+        self._main_program = None
+
+    def set_server_job(self, job):
+        # need to parse startup and main program in job
+        # need to parse current endpoint
+        # need to parse master endpoint
+        self._startup_program = job._server_startup_program
+        self._main_program = job._server_main_program
+
+    def start(self):
+        exe = fluid.Executor(fluid.CPUPlace())
+        exe.run(self._startup_program)
+        exe.run(self._main_program)
+

paddle_fl/core/strategy/details/__init__.py

+# Copyright (c) 2018 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 __future__ import print_function
+
+from .program_utils import *
+from .ufind import *
+from .checkport import *
+from .vars_distributed import *

paddle_fl/core/strategy/details/checkport.py

+# Copyright (c) 2018 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 time
+import socket
+from contextlib import closing
+from six import string_types
+
+
+def wait_server_ready(endpoints):
+    """
+    Wait until parameter servers are ready, use connext_ex to detect
+    port readiness.
+
+    Args:
+        endpoints (list): endpoints string list, like:
+                         ["127.0.0.1:8080", "127.0.0.1:8081"]
+
+    Examples:
+        .. code-block:: python
+
+           wait_server_ready(["127.0.0.1:8080", "127.0.0.1:8081"])
+    """
+    assert not isinstance(endpoints, string_types)
+    while True:
+        all_ok = True
+        not_ready_endpoints = []
+        for ep in endpoints:
+            ip_port = ep.split(":")
+            with closing(socket.socket(socket.AF_INET,
+                                       socket.SOCK_STREAM)) as sock:
+                sock.settimeout(2)
+                result = sock.connect_ex((ip_port[0], int(ip_port[1])))
+                if result != 0:
+                    all_ok = False
+                    not_ready_endpoints.append(ep)
+        if not all_ok:
+            sys.stderr.write("server not ready, wait 3 sec to retry...\n")
+            sys.stderr.write("not ready endpoints:" + str(not_ready_endpoints) +
+                             "\n")
+            sys.stderr.flush()
+            time.sleep(3)
+        else:
+            break

paddle_fl/core/strategy/details/program_utils.py

+# Copyright (c) 2018 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 __future__ import print_function
+
+import six
+
+from paddle.fluid import core
+import paddle
+
+
+def delete_ops(block, ops):
+    for op in ops:
+        try:
+            idx = list(block.ops).index(op)
+            block._remove_op(idx)
+        except Exception as e:
+            print(e)
+
+
+def find_op_by_input_arg(block, arg_name):
+    for index, op in enumerate(block.ops):
+        if arg_name in op.input_arg_names:
+            return index
+    return -1
+
+
+def find_op_by_output_arg(block, arg_name, reverse=False):
+    if reverse:
+        pos = len(block.ops) - 1
+        while pos >= 0:
+            op = block.ops[pos]
+            if arg_name in op.output_arg_names:
+                return pos
+            pos -= 1
+    else:
+        for index, op in enumerate(block.ops):
+            if arg_name in op.output_arg_names:
+                return index
+    return -1
+
+
+def get_indent_space(indent, space_num=4):
+    ret = ""
+    for i in range(0, indent * space_num):
+        ret += " "
+
+    return ret
+
+
+def variable_to_code(var):
+    """
+    Get readable codes of fluid variable.
+
+    Args:
+        var: A fluid operator.
+
+    Returns:
+        string: The formatted string.
+    """
+    if var.type == core.VarDesc.VarType.SELECTED_ROWS or var.type == core.VarDesc.VarType.LOD_TENSOR:
+        var_str = "{name} : fluid.{type}.shape{shape}.astype({dtype})".\
+            format(i="{", e="}", name=var.name, type=var.type, shape=var.shape, dtype=var.dtype)
+    else:
+        var_str = "{name} : fluid.{type})".\
+            format(i="{", e="}", name=var.name, type=var.type)
+
+    if type(var) == paddle.fluid.framework.Parameter:
+        if var.trainable:
+            var_str = "trainable parameter " + var_str
+        else:
+            var_str = "parameter " + var_str
+    else:
+        var_str = "var " + var_str
+
+    if var.persistable:
+        var_str = "persist " + var_str
+
+    return var_str
+
+
+def op_to_code(op, skip_op_callstack=True):
+    """
+    Get readable codes of fluid operator.
+
+    Args:
+        op: A fluid operator.
+
+    Returns:
+        string: The foramtted string.
+    """
+
+    outputs_str = "{"
+    for i in range(0, len(op.output_names)):
+        outputs_str += "{name}=".format(name=op.output_names[i])
+        o = op.output(op.output_names[i])
+        outputs_str += "{value}".format(value=o)
+        if i != len(op.output_names) - 1:
+            outputs_str += ", "
+    outputs_str += "}"
+
+    inputs_str = "{"
+    for i in range(0, len(op.input_names)):
+        inputs_str += "{name}=".format(name=op.input_names[i])
+        o = op.input(op.input_names[i])
+        inputs_str += "{value}".format(value=o)
+
+        if i != len(op.input_names) - 1:
+            inputs_str += ", "
+    inputs_str += "}"
+
+    attr_names = sorted(op.attr_names)
+    attrs_str = ""
+    for i in range(0, len(attr_names)):
+        name = attr_names[i]
+        if skip_op_callstack and name == "op_callstack":
+            continue
+
+        attr_type = op.desc.attr_type(name)
+        if attr_type == core.AttrType.BLOCK:
+            a = "{name} = block[{value}]".format(
+                name=name, type=attr_type, value=op._block_attr_id(name))
+            attrs_str += a
+            if i != len(attr_names) - 1:
+                attrs_str += ", "
+            continue
+
+        if attr_type == core.AttrType.BLOCKS:
+            a = "{name} = blocks{value}".format(
+                name=name, type=attr_type, value=op._blocks_attr_ids(name))
+            attrs_str += a
+            if i != len(attr_names) - 1:
+                attrs_str += ", "
+            continue
+
+        a = "{name} = {value}".format(
+            name=name, type=attr_type, value=op.desc.attr(name))
+        attrs_str += a
+        if i != len(attr_names) - 1:
+            attrs_str += ", "
+
+    if outputs_str != "{}":
+        op_str = "{outputs} = {op_type}(inputs={inputs}, {attrs})".\
+            format(outputs = outputs_str, op_type=op.type, inputs=inputs_str, attrs=attrs_str)
+    else:
+        op_str = "{op_type}(inputs={inputs}, {attrs})".\
+            format(op_type=op.type, inputs=inputs_str, attrs=attrs_str)
+    return op_str
+
+
+def block_to_code(block, block_idx, fout=None, skip_op_callstack=False):
+    indent = 0
+
+    print(
+        "{0}{1} // block {2}".format(get_indent_space(indent), '{', block_idx),
+        file=fout)
+
+    indent += 1
+    # sort all vars
+    all_vars = sorted(six.iteritems(block.vars), key=lambda x: x[0])
+    for var in all_vars:
+        print(
+            "{}{}".format(get_indent_space(indent), variable_to_code(var[1])),
+            file=fout)
+
+    if len(all_vars) > 0:
+        print("", file=fout)
+
+    for op in block.ops:
+        print(
+            "{}{}".format(
+                get_indent_space(indent), op_to_code(op, skip_op_callstack)),
+            file=fout)
+    indent -= 1
+
+    print("{0}{1}".format(get_indent_space(indent), '}'), file=fout)
+
+
+def program_to_code(prog, fout=None, skip_op_callstack=True):
+    """
+    Print readable codes of fluid program.
+
+    Args:
+        prog : A fluid program.
+
+    An example result like bellow:
+    https://github.com/PaddlePaddle/Paddle/pull/12673
+    """
+    block_idx = 0
+    for block in prog.blocks:
+        block_to_code(block, block_idx, fout, skip_op_callstack)
+        block_idx += 1

paddle_fl/core/strategy/details/ps_dispatcher.py

+#   Copyright (c) 2018 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 __future__ import print_function
+
+
+class PSDispatcher(object):
+    """
+    PSDispatcher is the base class for dispatching vars
+    into different pserver instance.
+    You need to implement the `dispatch` inferface.
+    """
+
+    def __init__(self, pserver_endpoints):
+        self._eps = pserver_endpoints
+        self._step = 0
+
+    @property
+    def eps(self):
+        return self._eps
+
+    def reset(self):
+        self._step = 0
+
+    def dispatch(self, varlist):
+        """
+        Args:
+            varlist(list): a list of Variables
+        Returns:
+            a map of pserver endpoint -> varname
+        """
+        AssertionError("Interface has not been implemented.")
+
+
+class HashName(PSDispatcher):
+    """
+    Hash variable names to several endpoints using python
+    "hash()" function.
+
+    Args:
+        pserver_endpoints (list): list of endpoint(ip:port).
+
+    Examples:
+        .. code-block:: python
+
+        pserver_endpoints = ["127.0.0.1:6007", "127.0.0.1:6008"]
+        vars = ["var1","var2","var3","var4","var5"]
+
+        rr = RoundRobin(pserver_endpoints)
+        rr.dispatch(vars)
+
+    """
+
+    def __init__(self, pserver_endpoints):
+        super(self.__class__, self).__init__(pserver_endpoints)
+
+    def _hash_block(self, block_str, total):
+        return hash(block_str) % total
+
+    def dispatch(self, varlist):
+        eplist = []
+        for var in varlist:
+            server_id = self._hash_block(var.name(), len(self._eps))
+            server_for_param = self._eps[server_id]
+            eplist.append(server_for_param)
+        return eplist
+
+
+class RoundRobin(PSDispatcher):
+    """
+    Distribute variables to serveral endpoints using
+    RondRobin<https://en.wikipedia.org/wiki/Round-robin_scheduling> method.
+
+    Args:
+        pserver_endpoints (list): list of endpoint(ip:port).
+
+    Examples:
+        .. code-block:: python
+
+        pserver_endpoints = ["127.0.0.1:6007", "127.0.0.1:6008"]
+        vars = ["var1","var2","var3","var4","var5"]
+
+        rr = RoundRobin(pserver_endpoints)
+        rr.dispatch(vars)
+
+    """
+
+    def __init__(self, pserver_endpoints):
+        super(self.__class__, self).__init__(pserver_endpoints)
+
+    def dispatch(self, varlist):
+        eplist = []
+        for var in varlist:
+            server_for_param = self._eps[self._step]
+            eplist.append(server_for_param)
+            self._step += 1
+            if self._step >= len(self._eps):
+                self._step = 0
+        return eplist

paddle_fl/core/strategy/details/ufind.py

+# Copyright (c) 2018 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 __future__ import print_function
+
+
+class UnionFind(object):
+    """ Union-find data structure.
+
+    Union-find is a data structure that keeps track of a set of elements partitioned
+    into a number of disjoint (non-overlapping) subsets.
+
+    Reference:
+    https://en.wikipedia.org/wiki/Disjoint-set_data_structure
+
+    Args:
+      elements(list): The initialize element list.
+    """
+
+    def __init__(self, elementes=None):
+        self._parents = []  # index -> parent index
+        self._index = {}  # element -> index
+        self._curr_idx = 0
+        if not elementes:
+            elementes = []
+        for ele in elementes:
+            self._parents.append(self._curr_idx)
+            self._index.update({ele: self._curr_idx})
+            self._curr_idx += 1
+
+    def find(self, x):
+        # Find the root index of given element x,
+        # execute the path compress while findind the root index
+        if not x in self._index:
+            return -1
+        idx = self._index[x]
+        while idx != self._parents[idx]:
+            t = self._parents[idx]
+            self._parents[idx] = self._parents[t]
+            idx = t
+        return idx
+
+    def union(self, x, y):
+        # Union two given element
+        x_root = self.find(x)
+        y_root = self.find(y)
+
+        if x_root == y_root:
+            return
+        self._parents[x_root] = y_root
+
+    def is_connected(self, x, y):
+        # If two given elements have the same root index,
+        # then they are connected.
+        return self.find(x) == self.find(y)

paddle_fl/core/strategy/details/vars_distributed.py

+# Copyright (c) 2018 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 __future__ import print_function
+from paddle.fluid.framework import Variable
+
+
+class VarStruct(object):
+    """
+    record part properties of a Variable in python.
+    """
+
+    def __init__(self, name, shape, dtype, type, lod_level, persistable):
+        self.name = name
+        self.shape = shape
+        self.dtype = dtype
+        self.type = type
+        self.lod_level = lod_level
+        self.persistable = persistable
+
+
+class VarDistributed(object):
+    """
+    a class to record the var distributed on parameter servers.
+    the class will record the relationship between origin var and slice var.
+    the slice var's properties, such as type/shape/offset/endpoint.
+    """
+
+    def __init__(self,
+                 origin_var,
+                 slice_var,
+                 is_slice=None,
+                 block_id=None,
+                 offset=None,
+                 vtype=None,
+                 endpoint=None):
+        """
+        Args:
+            origin_var(Variable|VarStruct): origin var properties
+            slice_var(Variable|VarStruct): slice var properties
+            is_slice(bool|None): slice or not, slice_var=True/False and its block size > 8192 are the judgement standard.
+            block_id(int|None): the number about the slice var.
+            offset(int|None): if the slice var is sliced, offset is the numel before the var.
+            vtype(str|None): a tag, such as Optimizer/Param/RemoteProfetch.
+            endpoint(str|None): which parameter the slice var on, such as "127.0.0.1:1001"
+        """
+
+        if isinstance(origin_var, Variable):
+            self.origin = self.__create_var_struct(origin_var)
+        else:
+            self.origin = origin_var
+
+        if isinstance(slice_var, Variable):
+            self.slice = self.__create_var_struct(slice_var)
+        else:
+            self.slice = slice_var
+
+        if self.equal(self.origin, self.slice):
+            self.is_slice = False
+            self.block_id = 0
+            self.offset = 0
+        else:
+            self.is_slice = True
+            self.block_id = 0
+            self.offset = 0
+
+        if is_slice is not None:
+            self.is_slice = is_slice
+        if block_id is not None:
+            self.block_id = block_id
+        if offset is not None:
+            self.offset = offset
+
+        self.vtype = vtype
+        self.endpoint = endpoint
+
+    @staticmethod
+    def __create_var_struct(var):
+        return VarStruct(var.name, var.shape, var.dtype, var.type,
+                         var.lod_level, var.persistable)
+
+    @staticmethod
+    def equal(var1, var2):
+        """
+        the two var is equal or not.
+        Returns:
+            bool: equal will return True else False
+        """
+        assert isinstance(var1, VarStruct) and isinstance(var2, VarStruct)
+
+        return var1.name == var2.name and \
+               var1.type == var2.type and \
+               var1.shape == var2.shape and \
+               var1.dtype == var2.dtype and \
+               var1.lod_level == var2.lod_level and \
+               var1.persistable == var2.persistable
+
+    def __str__(self):
+        origin_var_str = "{name} : fluid.{type}.shape{shape}.astype({dtype})". \
+            format(i="{", e="}", name=self.origin.name, type=self.origin.type,
+                   shape=self.origin.shape, dtype=self.origin.dtype)
+
+        slice_var_str = "{name} : fluid.{type}.shape{shape}.astype({dtype})" \
+                        ".slice({is_slice}).block({block_id}).offset({offset})". \
+            format(i="{", e="}", name=self.slice.name, type=self.slice.type,
+                   shape=self.slice.shape, dtype=self.slice.dtype,
+                   is_slice=self.is_slice, block_id=self.block_id, offset=self.offset)
+
+        return "var owned: {}, origin var: ( {} ), slice var: ( {} ), endpoint: {} ".format(
+            self.vtype, origin_var_str, slice_var_str, self.endpoint)
+
+
+class VarsDistributed(object):
+    """
+    a gather about VarDistributed with many methods to find distributed vars.
+    through the class, we can get overview about the distributed parameters on parameter servers.
+    this class may centralized and convenient for developer to manage and get variable's distribute.
+    other module can also use this to find variables such io.py.
+    """
+
+    def __init__(self):
+        self.distributed_vars = []
+
+    def add_distributed_var(self,
+                            origin_var,
+                            slice_var,
+                            is_slice=None,
+                            block_id=None,
+                            offset=None,
+                            vtype=None,
+                            endpoint=None):
+        """
+        add distributed var in this.
+
+        Args:
+            origin_var(Variable|VarStruct): origin var properties
+            slice_var(Variable|VarStruct): slice var properties
+            is_slice(bool|None): slice or not, slice_var=True/False and its block size > 8192 are the judgement standard.
+            block_id(int|None): the number about the slice var.
+            offset(int|None): if the slice var is sliced, offset is the numel before the var.
+            vtype(str|None): a tag, such as Optimizer/Param/RemoteProfetch.
+            endpoint(str|None): which parameter the slice var on, such as "127.0.0.1:1001"
+        Returns:
+            None
+        """
+        self.distributed_vars.append(
+            VarDistributed(origin_var, slice_var, is_slice, block_id, offset,
+                           vtype, endpoint))
+
+    def get_distributed_var_by_slice(self, var_name):
+        """
+        get distributed var by conditions.
+
+        Args:
+            var_name(str): slice var name, such as "w.traier0.block1"
+        Returns:
+            VarDistributed: distributed var.
+        """
+        for dist_var in self.distributed_vars:
+            if dist_var.slice.name == var_name:
+                return dist_var
+        return None
+
+    @staticmethod
+    def equal(var1, var2):
+        """
+        the two var is equal or not.
+        Returns:
+            bool: equal will return True else False
+        """
+        return var1.name == var2.name and \
+               var1.type == var2.type and \
+               var1.shape == var2.shape and \
+               var1.dtype == var2.dtype and \
+               var1.lod_level == var2.lod_level and \
+               var1.persistable == var2.persistable
+
+    def get_distributed_var_by_origin_and_ep(self, origin_var_name, endpoint):
+        """
+        get distributed var by conditions.
+
+        Args:
+            origin_var_name(str):
+            endpoint(str): the parameter endpoint, such as "127.0.0.1:1001"
+        Returns:
+            VarDistributed: distributed var.
+        """
+        for dist_var in self.distributed_vars:
+            if dist_var.origin.name == origin_var_name and dist_var.endpoint == endpoint:
+                return dist_var
+        return None
+
+    def get_distributed_vars_by_vtypes(self, vtypes, groupby=False):
+        """
+        get distributed vars by conditions.
+
+        Args:
+            vtype(str|None): distributed var's vtype, such as "Optimizer", "RemotePrefetch"
+            groupby(bool|False): group by origin var or not.
+
+        Returns:
+            list: distributed var list.
+            dict: distributed var map when groupby=True
+        """
+        vtype_vars = []
+        for var in self.distributed_vars:
+            if var.vtype in vtypes:
+                vtype_vars.append(var)
+        if not groupby:
+            return vtype_vars
+
+        params_map = {}
+        for var in vtype_vars:
+            origin_var_name = var.origin.name
+
+            if origin_var_name in params_map.keys():
+                optimizers = params_map.get(origin_var_name)
+            else:
+                optimizers = []
+            optimizers.append(var)
+            params_map[origin_var_name] = optimizers
+        return params_map
+
+    def get_distributed_vars_by_ep(self, endpoint, vtype=None):
+        """
+        get distributed vars by conditions.
+
+        Args:
+            endpoint(str): the parameter server endpoint, such as "127.0.0.1:2001"
+            vtype(str|None): distributed var's vtype, such as "Optimizer", "RemotePrefetch"
+
+        Returns:
+            list: distributed var list.
+        """
+        endpoint_vars = []
+        for var in self.distributed_vars:
+            if var.endpoint == endpoint:
+                endpoint_vars.append(var)
+        if not vtype:
+            return endpoint_vars
+
+        vtype_vars = []
+        for var in endpoint_vars:
+            if var.vtype == vtype:
+                vtype_vars.append(var)
+        return vtype_vars
+
+    def overview(self):
+        """
+        get the overview string about all params on all parameter servers.
+
+        Returns:
+            Str: overview string.
+
+        """
+        vars_str = []
+        for var in self.distributed_vars:
+            vars_str.append(str(var))
+        return "\n".join(vars_str)

paddle_fl/core/strategy/fl_strategy_base.py

+#   Copyright (c) 2019 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 .fl_distribute_transpiler import FLDistributeTranspiler 
+from paddle.fluid.optimizer import SGD
+import paddle.fluid as fluid
+
+class FLStrategyFactory(object):
+    """
+    FLStrategyFactory is a FLStrategy builder
+    Users can define strategy config to create different FLStrategy
+    """
+    def __init__(self):
+        self._fed_avg = False
+        self._dpsgd = False
+        self._inner_step = 1
+
+    @property
+    def fed_avg(self):
+        return self._fed_avg
+
+    @fed_avg.setter
+    def fed_avg(self, s):
+        self._fed_avg = s
+
+    @property
+    def dpsgd(self):
+        return self._dpsgd
+
+    @fed_avg.setter
+    def dpsgd(self, s):
+        self._dpsgd = s
+
+    @property
+    def inner_step(self):
+        return self._inner_step
+
+    @inner_step.setter
+    def inner_step(self, s):
+        self._inner_step = s
+
+    def create_fl_strategy(self):
+        """
+        The factory method
+        """
+        if self._fed_avg == True:
+            strategy = FedAvgStrategy()
+            strategy._fed_avg = True
+            strategy._dpsgd = False
+        elif self._dpsgd == True:
+            strategy = DPSGDStrategy()
+            strategy._fed_avg = False
+            strategy._dpsgd = True
+        strategy._inner_step = self._inner_step
+        return strategy
+
+
+class FLStrategyBase(object):
+    """
+    FLStrategyBase is federated learning algorithm container
+    """
+    def __init__(self):
+        self._fed_avg = False
+        self._dpsgd = False
+        self._inner_step = 1
+        pass
+
+    def minimize(self, optimizer=None, losses=[]):
+        """
+        minmize can do minimization as paddle.fluid.Optimizer.minimize does
+        this function can be overloaded so that for some FLStrategy, the
+        program should be transpiled before minimize
+
+        Args:
+            optimizer(paddle.fluid.optimizer): the user defined optimizer
+            losses(List(Variable)): list of loss variables in paddle.fluid
+        """
+        for loss in losses:
+            optimizer.minimize(loss)
+
+    def _build_trainer_program_for_job(
+            self, trainer_id=0, program=None,
+            ps_endpoints=[], trainers=0,
+            sync_mode=True, startup_program=None,
+            job=None):
+        pass
+
+    def _build_server_programs_for_job(
+            self, program=None, ps_endpoints=[],
+            trainers=0, sync_mode=True,
+            startup_program=None, job=None):
+        pass
+
+
+class DPSGDStrategy(FLStrategyBase):
+    """
+    DPSGDStrategy: Deep Learning with Differential Privacy. 2016
+    """
+    def __init__(self):
+        super(DPSGDStrategy, self).__init__()
+
+    def minimize(self, optimizer=None, losses=[]):
+        """
+        Do nothing in DPSGDStrategy in minimize function
+        """
+        optimizer.minimize(losses[0])
+
+    def _build_trainer_program_for_job(
+            self, trainer_id=0, program=None,
+            ps_endpoints=[], trainers=0,
+            sync_mode=True, startup_program=None,
+            job=None):
+        transpiler = fluid.DistributeTranspiler()
+        transpiler.transpile(trainer_id,
+                             program=program,
+                             pservers=",".join(ps_endpoints),
+                             trainers=trainers,
+                             sync_mode=sync_mode,
+                             startup_program=startup_program)
+        main = transpiler.get_trainer_program()
+        job._trainer_startup_programs.append(startup_program)
+        job._trainer_main_programs.append(main)
+
+    def _build_server_programs_for_job(
+            self, program=None, ps_endpoints=[],
+            trainers=0, sync_mode=True,
+            startup_program=None, job=None):
+        transpiler = fluid.DistributeTranspiler()
+        trainer_id = 0
+        transpiler.transpile(
+            trainer_id,
+            program=program,
+            pservers=",".join(ps_endpoints),
+            trainers=trainers,
+            sync_mode=sync_mode,
+            startup_program=startup_program)
+        job.set_server_endpoints(ps_endpoints)
+        for endpoint in ps_endpoints:
+            main_prog = transpiler.get_pserver_program(endpoint)
+            startup_prog = transpiler.get_startup_program(endpoint, main_prog)
+            job._server_startup_programs.append(startup_prog)
+            job._server_main_programs.append(main_prog)
+
+
+class FedAvgStrategy(FLStrategyBase):
+    """
+    FedAvgStrategy: this is model averaging optimization proposed in
+    H. Brendan McMahan, Eider Moore, Daniel Ramage, Blaise Aguera y Arcas. Federated Learning of Deep Networks using Model Averaging. 2017
+    """
+    def __init__(self):
+        super(FedAvgStrategy, self).__init__()
+
+    def minimize(self, optimizer=None, losses=[]):
+        """
+        minimize the first loss as in paddle.fluid
+        """
+        optimizer.minimize(losses[0])
+
+    def _build_trainer_program_for_job(
+            self, trainer_id=0, program=None,
+            ps_endpoints=[], trainers=0,
+            sync_mode=True, startup_program=None,
+            job=None):
+        transpiler = FLDistributeTranspiler()
+        transpiler.transpile(trainer_id,
+                             program=program,
+                             pservers=",".join(ps_endpoints),
+                             trainers=trainers,
+                             sync_mode=sync_mode,
+                             startup_program=startup_program)
+        recv, main, send = transpiler.get_trainer_program()
+        job._trainer_startup_programs.append(startup_program)
+        job._trainer_main_programs.append(main)
+        job._trainer_send_programs.append(send)
+        job._trainer_recv_programs.append(recv)
+
+    def _build_server_programs_for_job(
+            self, program=None, ps_endpoints=[],
+            trainers=0, sync_mode=True,
+            startup_program=None, job=None):
+        transpiler = FLDistributeTranspiler()
+        trainer_id = 0
+        transpiler.transpile(
+            trainer_id,
+            program=program,
+            pservers=",".join(ps_endpoints),
+            trainers=trainers,
+            sync_mode=sync_mode,
+            startup_program=startup_program)
+        job.set_server_endpoints(ps_endpoints)
+        for endpoint in ps_endpoints:
+            main_prog = transpiler.get_pserver_program(endpoint)
+            startup_prog = transpiler.get_startup_program(endpoint, main_prog)
+            job._server_startup_programs.append(startup_prog)
+            job._server_main_programs.append(main_prog)
+
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paddle_fl/core/trainer/__init__.py

+#   Copyright (c) 2019 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.

paddle_fl/core/trainer/fl_trainer.py

+#   Copyright (c) 2019 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 paddle.fluid as fluid
+
+class FLTrainerFactory(object):
+    def __init__(self):
+        pass
+
+    def create_fl_trainer(self, job):
+        strategy = job._strategy
+        trainer = None
+        if strategy._fed_avg == True:
+            trainer = FedAvgTrainer()
+            trainer.set_trainer_job(job)
+        elif strategy._dpsgd == True:
+            trainer = FLTrainer()
+            trainer.set_trainer_job(job)
+        trainer.set_trainer_job(job)
+        return trainer
+
+
+class FLTrainer(object):
+    def __init__(self):
+        pass
+
+    def set_trainer_job(self, job):
+        self._startup_program = \
+            job._trainer_startup_program
+        self._main_program = \
+            job._trainer_main_program
+        self._step = job._strategy._inner_step
+        self._feed_names = job._feed_names
+        self._target_names = job._target_names
+
+    def start(self):
+        self.exe = fluid.Executor(fluid.CPUPlace())
+        self.exe.run(self._startup_program)
+
+    def train_inner_loop(self, reader):
+        now_step = 0
+        for data in reader():
+            now_step += 1
+            if now_step > self._step:
+                break
+            self.exe.run(self._main_program,
+                         feed=data,
+                         fetch_list=[])
+
+    def save_inference_program(self, output_folder):
+        target_vars = []
+        infer_program = self._main_program.clone(for_test=True)
+        for name in self._target_names:
+            tmp_var = self._main_program.block(0)._find_var_recursive(name)
+            target_vars.append(tmp_var)
+        fluid.io.save_inference_model(
+            output_folder,
+            self._feed_names,
+            target_vars,
+            self.exe,
+            main_program=infer_program)
+
+    def stop(self):
+        # ask for termination with master endpoint
+        # currently not open sourced, will release the code later
+        # TODO(guru4elephant): add connection with master
+        return False
+
+class FedAvgTrainer(FLTrainer):
+    def __init__(self):
+        super(FedAvgTrainer, self).__init__()
+        pass
+
+    def start(self):
+        self.exe = fluid.Executor(fluid.CPUPlace())
+        self.exe.run(self._startup_program)
+
+    def set_trainer_job(self, job):
+        super(FedAvgTrainer, self).set_trainer_job(job)
+        self._send_program = job._trainer_send_program
+        self._recv_program = job._trainer_recv_program
+
+    def train_inner_loop(self, reader):
+        self.exe.run(self._recv_program)
+        now_step = 0
+        for data in reader():
+            now_step += 1
+            if now_step > self._step:
+                break
+            self.exe.run(self._main_program,
+                         feed=data,
+                         fetch_list=[])
+        self.exe.run(self._send_program)
+
+    def stop(self):
+        return False
+        

paddle_fl/examples/ctr_demo/fl_master.py

+import paddle.fluid as fluid
+import paddle_fl as fl
+from paddle_fl.core.master.job_generator import JobGenerator
+from paddle_fl.core.strategy.fl_strategy_base import FLStrategyFactory
+
+class Model(object):
+    def __init__(self):
+        pass
+
+    def mlp(self, inputs, label, hidden_size=128):
+        self.concat = fluid.layers.concat(inputs, axis=1)
+        self.fc1 = fluid.layers.fc(input=self.concat, size=256, act='relu')
+        self.fc2 = fluid.layers.fc(input=self.fc1, size=128, act='relu')
+        self.predict = fluid.layers.fc(input=self.fc2, size=2, act='softmax')
+        self.sum_cost = fluid.layers.cross_entropy(input=self.predict, label=label)
+        self.accuracy = fluid.layers.accuracy(input=self.predict, label=label)
+        self.loss = fluid.layers.reduce_mean(self.sum_cost)
+        self.startup_program = fluid.default_startup_program()
+
+inputs = [fluid.layers.data( \
+            name=str(slot_id), shape=[5],
+            dtype="float32")
+          for slot_id in range(3)]
+label = fluid.layers.data( \
+            name="label",
+            shape=[1],
+            dtype='int64')
+
+model = Model()
+model.mlp(inputs, label)
+
+job_generator = JobGenerator()
+optimizer = fluid.optimizer.SGD(learning_rate=0.1)
+job_generator.set_optimizer(optimizer)
+job_generator.set_losses([model.loss])
+job_generator.set_startup_program(model.startup_program)
+job_generator.set_infer_feed_and_target_names(
+    [x.name for x in inputs], [model.predict.name])
+
+build_strategy = FLStrategyFactory()
+build_strategy.fed_avg = True
+build_strategy.inner_step = 1
+strategy = build_strategy.create_fl_strategy()
+
+# endpoints will be collected through the cluster
+# in this example, we suppose endpoints have been collected
+endpoints = ["127.0.0.1:8181"]
+output = "fl_job_config"
+job_generator.generate_fl_job(
+    strategy, server_endpoints=endpoints, worker_num=2, output=output)
+# fl_job_config will  be dispatched to workers

paddle_fl/examples/ctr_demo/fl_server.py

+#   Copyright (c) 2019 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 paddle_fl as fl
+import paddle.fluid as fluid
+from paddle_fl.core.server.fl_server import FLServer
+from paddle_fl.core.master.fl_job import FLRunTimeJob
+server = FLServer()
+server_id = 0
+job_path = "fl_job_config"
+job = FLRunTimeJob()
+job.load_server_job(job_path, server_id)
+server.set_server_job(job)
+server.start()

paddle_fl/examples/ctr_demo/fl_trainer.py

+from paddle_fl.core.trainer.fl_trainer import FLTrainerFactory
+from paddle_fl.core.master.fl_job import FLRunTimeJob
+import numpy as np
+import sys
+
+def reader():
+    for i in range(1000):
+        data_dict = {}
+        for i in range(3):
+            data_dict[str(i)] = np.random.rand(1, 5).astype('float32')
+        data_dict["label"] = np.random.randint(2, size=(1, 1)).astype('int64')
+        yield data_dict
+
+trainer_id = int(sys.argv[1]) # trainer id for each guest
+job_path = "fl_job_config"
+job = FLRunTimeJob()
+job.load_trainer_job(job_path, trainer_id)
+trainer = FLTrainerFactory().create_fl_trainer(job)
+trainer.start()
+
+output_folder = "fl_model"
+step_i = 0
+while not trainer.stop():
+    step_i += 1
+    print("batch %d start train" % (step_i))
+    trainer.train_inner_loop(reader)
+    trainer.save_inference_program(output_folder)

paddle_fl/examples/ctr_demo/run.sh

+unset http_proxy
+unset https_proxy
+python fl_master.py
+sleep 2
+python -u fl_server.py >server0.log &
+sleep 2
+python -u fl_trainer.py 0 >trainer0.log &
+sleep 2
+python -u fl_trainer.py 1 >trainer1.log &

paddle_fl/examples/dpsgd_demo/fl_master.py

+import paddle.fluid as fluid
+import paddle_fl as fl
+from paddle_fl.core.master.job_generator import JobGenerator
+from paddle_fl.core.strategy.fl_strategy_base import FLStrategyFactory
+import math 
+
+class Model(object):
+    def __init__(self):
+        pass
+
+    def mlp(self, inputs, label, hidden_size=128):
+        self.concat = fluid.layers.concat(inputs, axis=1)
+        self.fc1 = fluid.layers.fc(input=self.concat, size=256, act='relu')
+        self.fc2 = fluid.layers.fc(input=self.fc1, size=128, act='relu')
+        self.predict = fluid.layers.fc(input=self.fc2, size=2, act='softmax')
+        self.sum_cost = fluid.layers.cross_entropy(input=self.predict, label=label)
+        self.accuracy = fluid.layers.accuracy(input=self.predict, label=label)
+        self.loss = fluid.layers.reduce_mean(self.sum_cost)
+        self.startup_program = fluid.default_startup_program()
+
+inputs = [fluid.layers.data( \
+            name=str(slot_id), shape=[5],
+            dtype="float32")
+          for slot_id in range(3)]
+label = fluid.layers.data( \
+            name="label",
+            shape=[1],
+            dtype='int64')
+
+model = Model()
+model.mlp(inputs, label)
+
+STEP_EPSILON = 10
+DELTA = 0.00001
+SIGMA = math.sqrt(2.0 * math.log(1.25/DELTA)) / STEP_EPSILON
+CLIP = 10.0
+batch_size = 1
+
+job_generator = JobGenerator()
+optimizer = fluid.optimizer.Dpsgd(0.1, clip=CLIP, batch_size=float(batch_size), sigma=0.0 * SIGMA)
+job_generator.set_optimizer(optimizer)
+job_generator.set_losses([model.loss])
+job_generator.set_startup_program(model.startup_program)
+
+build_strategy = FLStrategyFactory()
+build_strategy.dpsgd = True
+build_strategy.inner_step = 1
+strategy = build_strategy.create_fl_strategy()
+
+# endpoints will be collected through the cluster
+# in this example, we suppose endpoints have been collected
+endpoints = ["127.0.0.1:8181"]
+output = "fl_job_config"
+job_generator.generate_fl_job(
+    strategy, server_endpoints=endpoints, worker_num=2, output=output)
+# fl_job_config will  be dispatched to workers

paddle_fl/examples/dpsgd_demo/fl_server.py

+#   Copyright (c) 2019 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 paddle_fl as fl
+import paddle.fluid as fluid
+from paddle_fl.core.server.fl_server import FLServer
+from paddle_fl.core.master.fl_job import FLRunTimeJob
+server = FLServer()
+server_id = 0
+job_path = "fl_job_config"
+job = FLRunTimeJob()
+job.load_server_job(job_path, server_id)
+server.set_server_job(job)
+server.start()

paddle_fl/examples/dpsgd_demo/fl_trainer.py

+from paddle_fl.core.trainer.fl_trainer import FLTrainerFactory
+from paddle_fl.core.master.fl_job import FLRunTimeJob
+import numpy as np
+import sys
+
+def reader():
+    for i in range(1000):
+        data_dict = {}
+        for i in range(3):
+            data_dict[str(i)] = np.random.rand(1, 5).astype('float32')
+        data_dict["label"] = np.random.randint(2, size=(1, 1)).astype('int64')
+        yield data_dict
+
+trainer_id = int(sys.argv[1]) # trainer id for each guest
+job_path = "fl_job_config"
+job = FLRunTimeJob()
+job.load_trainer_job(job_path, trainer_id)
+trainer = FLTrainerFactory().create_fl_trainer(job)
+trainer.start()
+
+step_i = 0
+while not trainer.stop():
+    step_i += 1
+    print("batch %d start train" % (step_i))
+    trainer.train_inner_loop(reader)

paddle_fl/examples/dpsgd_demo/run.sh

+python fl_master.py
+sleep 2
+python -u fl_server.py >server0.log &
+sleep 2
+python -u fl_trainer.py 0 >trainer0.log &
+sleep 2
+python -u fl_trainer.py 1 >trainer1.log &
+

paddle_fl/examples/gru4rec_demo/download.sh

+wget --no-check-certificate https://paddlefl.bj.bcebos.com/rsc15_benchmark/mid_data.tar
+tar xvf mid_data.tar

paddle_fl/examples/gru4rec_demo/fl_master.py

+import paddle.fluid as fluid
+import paddle_fl as fl
+from paddle_fl.core.master.job_generator import JobGenerator
+from paddle_fl.core.strategy.fl_strategy_base import FLStrategyFactory
+
+class Model(object):
+    def __init__(self):
+        pass
+
+    def gru4rec_network(self,
+                        vocab_size=37483,
+                        hid_size=10,
+                        init_low_bound=-0.04,
+                        init_high_bound=0.04):
+        """ network definition """
+        emb_lr_x = 10.0
+        gru_lr_x = 1.0
+        fc_lr_x = 1.0
+        # Input data
+        src_wordseq = fluid.layers.data(
+            name="src_wordseq", shape=[1], dtype="int64", lod_level=1)
+        dst_wordseq = fluid.layers.data(
+            name="dst_wordseq", shape=[1], dtype="int64", lod_level=1)
+
+        emb = fluid.layers.embedding(
+            input=src_wordseq,
+            size=[vocab_size, hid_size],
+            param_attr=fluid.ParamAttr(
+                initializer=fluid.initializer.Uniform(
+                    low=init_low_bound, high=init_high_bound),
+                learning_rate=emb_lr_x),
+            #is_distributed=True,
+            is_sparse=False)
+        fc0 = fluid.layers.fc(input=emb,
+                              size=hid_size * 3,
+                              param_attr=fluid.ParamAttr(
+                                  initializer=fluid.initializer.Uniform(
+                                      low=init_low_bound, high=init_high_bound),
+                                  learning_rate=gru_lr_x))
+        gru_h0 = fluid.layers.dynamic_gru(
+            input=fc0,
+            size=hid_size,
+            param_attr=fluid.ParamAttr(
+                initializer=fluid.initializer.Uniform(
+                    low=init_low_bound, high=init_high_bound),
+                learning_rate=gru_lr_x))
+
+        fc = fluid.layers.fc(input=gru_h0,
+                             size=vocab_size,
+                             act='softmax',
+                             param_attr=fluid.ParamAttr(
+                                 initializer=fluid.initializer.Uniform(
+                                     low=init_low_bound, high=init_high_bound),
+                                 learning_rate=fc_lr_x))
+        cost = fluid.layers.cross_entropy(input=fc, label=dst_wordseq)
+        acc = fluid.layers.accuracy(input=fc, label=dst_wordseq, k=20)
+        self.loss = fluid.layers.mean(x=cost)
+        self.startup_program = fluid.default_startup_program()
+
+
+
+model = Model()
+model.gru4rec_network()
+
+job_generator = JobGenerator()
+optimizer = fluid.optimizer.SGD(learning_rate=2.0)
+job_generator.set_optimizer(optimizer)
+job_generator.set_losses([model.loss])
+job_generator.set_startup_program(model.startup_program)
+
+build_strategy = FLStrategyFactory()
+build_strategy.fed_avg = True
+build_strategy.inner_step = 10
+strategy = build_strategy.create_fl_strategy()
+
+# endpoints will be collected through the cluster
+# in this example, we suppose endpoints have been collected
+endpoints = ["127.0.0.1:8181"]
+output = "fl_job_config"
+job_generator.generate_fl_job(
+    strategy, server_endpoints=endpoints, worker_num=2, output=output)
+# fl_job_config will  be dispatched to workers

paddle_fl/examples/gru4rec_demo/fl_server.py

+#   Copyright (c) 2019 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 paddle_fl as fl
+import paddle.fluid as fluid
+from paddle_fl.core.server.fl_server import FLServer
+from paddle_fl.core.master.fl_job import FLRunTimeJob
+server = FLServer()
+server_id = 0
+job_path = "fl_job_config"
+job = FLRunTimeJob()
+job.load_server_job(job_path, server_id)
+server.set_server_job(job)
+server.start()

paddle_fl/examples/gru4rec_demo/fl_trainer.py

+from paddle_fl.core.trainer.fl_trainer import FLTrainerFactory
+from paddle_fl.core.master.fl_job import FLRunTimeJob
+from paddle_fl.reader.gru4rec_reader import Gru4rec_Reader
+import paddle.fluid as fluid
+import numpy as np
+import sys
+import os
+
+
+trainer_id = int(sys.argv[1]) # trainer id for each guest
+place = fluid.CPUPlace()
+train_file_dir = "mid_data/node1/0/"
+job_path = "fl_job_config"
+job = FLRunTimeJob()
+job.load_trainer_job(job_path, trainer_id)
+trainer = FLTrainerFactory().create_fl_trainer(job)
+trainer.start()
+
+r = Gru4rec_Reader()
+train_reader = r.reader(train_file_dir, place)
+
+step_i = 0
+while not trainer.stop():
+    step_i += 1
+    print("batch %d start train" % (step_i))
+    trainer.train_inner_loop(train_reader) 

paddle_fl/examples/gru4rec_demo/run.sh

+python fl_master.py
+sleep 2
+python -u fl_server.py >server0.log &
+sleep 2
+python -u fl_trainer.py 0 >trainer0.log &
+sleep 2
+python -u fl_trainer.py 1 >trainer1.log &

paddle_fl/reader/__init__.py

+#   Copyright (c) 2019 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 .gru4rec_reader import Gru4rec_Reader

paddle_fl/reader/gru4rec_reader.py

+import paddle.fluid as fluid
+import numpy as np
+import os
+
+class Gru4rec_Reader:
+    def __init__(self):
+        pass
+
+    def to_lodtensor(self, data, place):
+        """ convert to LODtensor """
+        seq_lens = [len(seq) for seq in data]
+        cur_len = 0
+        lod = [cur_len]
+        for l in seq_lens:
+            cur_len += l
+            lod.append(cur_len)
+        flattened_data = np.concatenate(data, axis=0).astype("int64")
+        flattened_data = flattened_data.reshape([len(flattened_data), 1])
+        res = fluid.LoDTensor()
+        res.set(flattened_data, place)
+        res.set_lod([lod])
+        return res
+
+
+    def lod_reader(self, reader, place):
+        def feed_reader():
+            for data in reader():
+                lod_src_wordseq = self.to_lodtensor([dat[0] for dat in data],
+                                                    place)
+                lod_dst_wordseq = self.to_lodtensor([dat[1] for dat in data],
+                                                    place)
+                fe_data = {}
+                fe_data["src_wordseq"] = lod_src_wordseq
+                fe_data["dst_wordseq"] = lod_dst_wordseq
+                yield fe_data
+        return feed_reader
+
+    def sort_batch(self, reader, batch_size, sort_group_size, drop_last=False):
+        """
+        Create a batched reader.
+        """
+        def batch_reader():
+            r = reader()
+            b = []
+            for instance in r:
+                b.append(instance)
+                if len(b) == sort_group_size:
+                    sortl = sorted(b, key=lambda x: len(x[0]), reverse=True)
+                    b = []
+                    c = []
+                    for sort_i in sortl:
+                        c.append(sort_i)
+                        if (len(c) == batch_size):
+                            yield c
+                            c = []
+
+            if drop_last == False and len(b) != 0:
+                sortl = sorted(b, key=lambda x: len(x[0]), reverse=True)
+                c = []
+                for sort_i in sortl:
+                    c.append(sort_i)
+            if (len(c) == batch_size):
+                yield c
+                c = []
+
+        # Batch size check
+        batch_size = int(batch_size)
+        if batch_size <= 0:
+            raise ValueError("batch_size should be a positive integeral value, "
+                         "but got batch_size={}".format(batch_size))
+        return batch_reader
+
+
+    def reader_creator(self, file_dir):
+        def reader():
+            files = os.listdir(file_dir)
+            for fi in files:
+                with open(file_dir + '/' + fi, "r") as f:
+                    for l in f:
+                        l = l.strip().split()
+                        l = [w for w in l]
+                        src_seq = l[:len(l) - 1]
+                        trg_seq = l[1:]
+                        yield src_seq, trg_seq
+        return reader
+
+    def reader(self, file_dir, place, batch_size=5):
+        """ prepare the English Pann Treebank (PTB) data """
+        print("start constuct word dict")
+        reader = self.sort_batch(self.reader_creator(file_dir), batch_size, batch_size * 20)
+        return self.lod_reader(reader, place)

paddle_fl/version.py

+# Copyright (c) 2019  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.
+""" PaddleFL version string """
+fl_version = "0.1.0"
+module_proto_version = "0.1.0"