fix bugs

doc/design/file_manager/README.md

 # FileManager设计文档
 ## 目标
 在本文档中，我们设计说明了名为FileManager系统，方便让用户上传自己的训练数据以进行分布式训练
+
 主要功能包括：
 
 - 提供常用的命令行管理命令管理文件和目录
@@ -41,13 +42,16 @@ RESTful API
 	- `POST /api/v1/files`: Create files or directories.
 	- `DELETE /api/v1/files`: Delete files or directories.
 
+- /api/v1/file/chunks
+	- `GET /api/v1/storage/file/chunks`: Get chunks's attributes in a file.
+
 - /api/v1/storage/files
 	- `GET /api/v1/storage/files`: Download files or directories to local.
 	- `POST /api/v1/storage/files`: Upload files or directories to server.
 
 - /api/v1/storage/file/chunks
-	- `GET /api/v1/storage/file/chunks`: Get chunks's attributes in a file.
-	- `POST /api/v1/storage/file/chunks`: Upload chunks to a file.
+	- `GET /api/v1/storage/file/chunks`: Upload chunks data.
+	- `POST /api/v1/storage/file/chunks`: Download chunks data.
 ```
 ## 文件传输优化
 

doc/design/file_manager/pfs/pfsclient.md

@@ -31,7 +31,7 @@ When using a command, we need to specify path arguments. There are two path argu
 
 A `pfspath` begin with `/pfs`, eg: `/pfs/$DATACENTER/home/$USER/folder`.
 
-[Here](https://github.com/PaddlePaddle/Paddle/blob/develop/doc/design/cluster_train/data_dispatch.md#上传训练文件) is how to config DataCenter
+[Here](https://github.com/PaddlePaddle/Paddle/blob/develop/doc/design/cluster_train/data_dispatch.md#上传训练文件) is how to config datacenters.
 
 ## order of Path Arguments
 Commonly, if there are two path arguments, the first is the source, and the second is the destination.