[GitHub] [incubator-iotdb] LeiRui commented on a change in pull request #537: [IOTDB-220]Add hot-load configuration function

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LeiRui commented on a change in pull request #537: [IOTDB-220]Add hot-load configuration function
URL: https://github.com/apache/incubator-iotdb/pull/537#discussion_r345717370
 
 

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 File path: docs/Documentation/UserGuide/3-Server/4-Config Manual.md
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 @@ -29,13 +29,22 @@ Before starting to use IoTDB, you need to config the configuration files first.
 In total, we provide users three kinds of configurations module: 
 
 * environment configuration file (`iotdb-env.bat`, `iotdb-env.sh`). The default configuration file for the environment configuration item. Users can configure the relevant system configuration items of JAVA-JVM in the file.
-* system configuration file (`tsfile-format.properties`, `iotdb-engine.properties`). 
-	* `tsfile-format.properties`: The default configuration file for the IoTDB file layer configuration item. Users can configure the information about the TsFile, such as the data size written to the disk per time(`group_size_in_byte`). 
-	* `iotdb-engine.properties`: The default configuration file for the IoTDB engine layer configuration item. Users can configure the IoTDB engine related parameters in the file, such as JDBC service listening port (`rpc_port`), unsequence data storage directory (`unsequence_data_dir`), etc.
+* system configuration file (`iotdb-engine.properties`). 
+	* `iotdb-engine.properties`: The default configuration file for the IoTDB engine layer configuration item. Users can configure the IoTDB engine related parameters in the file, such as JDBC service listening port (`rpc_port`), unsequence data storage directory (`unsequence_data_dir`), etc. What's more, Users can configure the information about the TsFile, such as the data size written to the disk per time(`group_size_in_byte`). 
+                                                                                                                                                                                                                                                                                                                   	
 * log configuration file (`logback.xml`)
 
 The configuration files of the three configuration items are located in the IoTDB installation directory: `$IOTDB_HOME/conf` folder.
 
+## Hot Modification Configuration
+
+For the convenience of users, IoTDB server provides users with hot modification function, that is, modifying some configuration parameters in `iotdb engine. Properties` during the system operation and applying them to the system immediately. 
+In the parameters described below, these parameters whose way of `Effective` is `trigger` support hot modification.
+
+Trigger way: The client sends the command `load configuration` to the IoTDB server. See Chapter 4 for the usage of the client.
+为方便用户使用，IoTDB Server为用户提供了热修改功能，即在系统运行过程中修改`iotdb-engine.properties`中部分配置参数并即时应用到系统中。下面介绍的参数中，改后
 
 Review comment:
   Why Chinese here?

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