Configuring Service Parameters

On MRS Manager, you can view and modify the default service configurations based on site requirements and export or import the configurations.

Impact on the System

You need to download and update the client configuration files after configuring HBase, HDFS, Hive, Spark, Yarn, and MapReduce service properties.
The parameters of DBService cannot be modified when only one DBService role instance exists in the cluster.

Procedure

Modify a service.
1. Click Services.
2. Select the target service from the service list.
3. Click Service Configuration.
4. Set Type to All. All configuration parameters of the service are displayed in the navigation tree. The root nodes from top down in the navigation tree represent the service names and role names.
5. In the navigation tree, select a specified parameter and change its value. You can also enter the parameter name in the Search box to search for the parameter and view the result.
  If you want to cancel the modification of a parameter value, click to restore it.
  
  You can also use host groups to change role instance configurations in batches. Select a role name from the Role drop-down list and choose < Select Host > in the Host drop-down list. Enter a name in the Host Group Name text box, select the hosts to be modified from the Host list, add them to the Selected hosts area, and click OK. The added host group can be selected from Host and is only valid on the current page. The page cannot be saved after being refreshed.
6. Click Save Configuration and select Restart the affected services or instances. Click OK to restart the services.
  After Operation successful. is displayed, click Finish. The service is started successfully.
  
  To update the queue configuration of the Yarn service without restarting service, choose More > Refresh Queue to update the queue for the configuration to take effect.
Export service configuration parameters.
1. Click Services.
2. Select a service.
3. Click Service Configuration.
4. Click Export Service Configuration. Select a path for saving the configuration files.
Import service configuration parameters.
1. Click Services.
2. Select a service.
3. Click Service Configuration.
4. Click Import Service Configuration.
5. Select the target configuration file.
6. Click Save Configuration and select Restart the affected services or instances. Click OK.
  After Operation successful. is displayed, click Finish. The service is started successfully.