fix

Author: yinhaofeng

doc/fleet_mode.md

@@ -36,4 +36,8 @@ fleetrun --worker_num=1 --server_num=1 tools/static_ps_trainer.py -m models/rank
 
 ```shell
 fleetrun --workers="ip1:port1,ip2:port2...ipN:portN" --servers="ip1:port1,ip2:port2...ipN:portN" tools/static_ps_trainer.py -m models/rank/dnn/config.yaml
-```
+```
+
+## 常用数据集
+这是PaddleRec的数据集的的存储库。您可以在这里方便的一键下载我们处理完成的数据集，也可以使用PaddleRec轻松测试这些数据集上不同推荐模型的性能。  
+[推荐系统数据集](https://github.com/PaddlePaddle/PaddleRec/blob/master/datasets/readme.md)

doc/ps_background.md

@@ -1,7 +1,7 @@
-## [分布式训练概述](https://www.paddlepaddle.org.cn/tutorials/projectdetail/511818)
+## [分布式训练概述](https://fleet-x.readthedocs.io/en/latest/paddle_fleet_rst/distributed_introduction.html)
 
 
-## [多机多卡训练](https://www.paddlepaddle.org.cn/tutorials/projectdetail/479613)
+## [多机多卡训练](https://fleet-x.readthedocs.io/en/latest/paddle_fleet_rst/collective/collective_quick_start.html)
 
 
-## [参数服务器训练](https://www.paddlepaddle.org.cn/tutorials/projectdetail/487871)
+## [参数服务器训练](https://fleet-x.readthedocs.io/en/latest/paddle_fleet_rst/parameter_server/ps_quick_start.html)

doc/source/paddlerec/ps_background.md

@@ -1,8 +1,9 @@
 ## 分布式学习介绍
-### [分布式训练概述](https://www.paddlepaddle.org.cn/tutorials/projectdetail/511818)
 
+## [分布式训练概述](https://fleet-x.readthedocs.io/en/latest/paddle_fleet_rst/distributed_introduction.html)
 
-### [多机多卡训练](https://www.paddlepaddle.org.cn/tutorials/projectdetail/479613)
 
+## [多机多卡训练](https://fleet-x.readthedocs.io/en/latest/paddle_fleet_rst/collective/collective_quick_start.html)
 
-### [参数服务器训练](https://www.paddlepaddle.org.cn/tutorials/projectdetail/487871)
+
+## [参数服务器训练](https://fleet-x.readthedocs.io/en/latest/paddle_fleet_rst/parameter_server/ps_quick_start.html)