Managing and Monitoring a Cluster
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Decommission a DataNode

Use Ambari Web > Hosts > Actions to decommission a DataNode component.

  1. Using Ambari Web, browse the Hosts page.
  2. Find and click the FQDN of the host on which the DataNode 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 Action option shows Recommission.