Apache Ambari Operations
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Decommission a Component

To decommission a component (a DataNode, in the following example):

Steps

  1. Using Ambari Web, browse the Hosts page.

  2. Find and click the FQDN of the host on which the component resides.

  3. Using the Actions control, click Selected Hosts > DataNodes > Decommission:

The UI shows Decommissioning status while in process:

When this DataNode decommissioning process is finished, the status display changes to Decommissioned (shown here for NodeManager).