Step 9: Restart data nodes in Apache Ambari

In the Apache Ambari dashboard, perform the following steps:

1. Navigate to the HDFS Summary page.

2. At the top of the page, select either Restart, Restart DataNodes, or Service Actions.

3. Select the configuration settings that are consistent with your normal best practices for data node rolling restarts in this environment.

4. Select Only restart DataNodes with stale configs.

5. Select Trigger Rolling Restart.

After the rolling restart is complete, the data nodes start tiering to Data Optimizer.

For help verifying that tiering is occurring, see Tiering HDFS Blocks to Pentaho Data Optimizer.