Configuring Role Instance Parameters

Scenario

You can view and modify default role instance configuration on MRS based on site requirements. The configurations can be imported and exported.

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.

Prerequisites

You have synchronized IAM users. (On the Dashboard page, click Synchronize on the right side of IAM User Sync to synchronize IAM users.)

Figure 1 Synchronizing IAM users

Modifying Role Instance Parameters

1. On the cluster details page, click the Components tab.
   Figure 2 Components tab page (using MRS 1.9.2 as an example)
   
2. Select the target service from the service list.
3. Click the Instances tab.
4. Click the target role instance from the role instance list.
5. Click the Instance Configuration tab.
6. Switch Basic to All from the drop-down list on the right of the page. All configuration parameters of the role instance are displayed in the navigation tree.
7. 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.

8. Click Save Configuration and operate as prompted.