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How to Remove Non-Critical Nodes from a BDA Cluster (Doc ID 2244458.1)

Last updated on MAY 24, 2023

Applies to:

Big Data Appliance Integrated Software - Version 4.6.0 and later
Linux x86-64


How to remove a non-critical nodes from a BDA Cluster. This applies to BDA V4.4 and higher.

This note also includes a section on how to add a non-critical node back into the cluster.


ACS, system admin, or anyone removing a non-critical node from a BDA cluster.


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In this Document
 Frequently Asked Questions
 Where can questions on the Mammoth decommission step with bdacli be found?
 Does removing or adding non-critical nodes to a cluster require a cluster restart or cluster downtime?
 After removing a non-critical node out of the BDA cluster for use as an edge node, is it supported to change the disk mounts from /u01 to /u12 to be configured in RAID1?
 When removing a non-critical node from a BDA cluster does /opt/oracle/bda/rack-network.json or /opt/oracle/bda/cluster-network.json require update?
 When removing a non-critical node from a cluster why isn't it necessary to update /opt/oracle/bda/cluster-network.json to reflect the change?
 Known Issues
 Overview of the Steps to Remove a Non-Critical Node
 Detailed Steps to Remove a Non-Critical Node
 Make sure the cluster is healthy
 Look for Under-Replicated Blocks and Set the Replication Factor to 3
 Decommission the Node and Ensure the Cluster is Healthy
 Stop/Delete All Roles on the Host in Cloudera Manager
 Delete the Host from Cloudera Manager
 Restart Services/Deploy Client Configuration so the Cluster is Healthy
 Update /opt/oracle/bda/install/state/config.json and /opt/oracle/bda/cluster-hosts-infiniband to remove all references to the removed node.
 Update /opt/oracle/bda/install/state/config.json
 Update /opt/oracle/bda/cluster-hosts-infiniband
 Ensure the Cluster is Healthy
 Steps Required for Clusters Running Big Data SQL 3.1.
 Run a HDFS Rebalance
 How to Add a Non-Critical Node Back into the Cluster

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