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 laterLinux x86-64
Purpose
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.
Scope
ACS, system admin, or anyone removing a non-critical node from a BDA cluster.
Details
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In this Document
| Purpose |
| Scope |
| Details |
| Introduction |
| 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 |
| References |