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Oracle Big Data Appliance V3.*/4.* Release, CDH Full Rack Cluster Expansion Related Frequently Asked Questions (FAQ) (Doc ID 1927890.1)

Last updated on MARCH 12, 2021

Applies to:

Big Data Appliance Integrated Software - Version 3.0 and later
Linux x86-64

Purpose

This document provides answers to frequently asked CDH full rack cluster expansion related questions on Oracle Big Data Appliance (BDA). 

Questions and Answers

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In this Document
Purpose
Questions and Answers
 Does adding a new rack to an existing  BDA require a downtime? 
 Is there a general list of prerequisite steps to preform before a Mammoth Cluster Expansion?
 What else does "./mammoth -e" require when it starts?
 What is the recommended approach for extending a 3.0.1 Cluster?
 What is the recommended approach for extending a 3.1 Cluster? 
 What is the recommended approach for extending a 4.0.* Cluster? 
 What is the recommended approach for extending a 4.1 or higher Cluster?
 Is it needed to balance the cluster after the expansion? 
 Are any CDH roles reallocated when adding servers from a new rack to an existing single-rack cluster ?
 What command/s needs to executed to perform the expansion?
 Are Oracle Big Data Connectors installed on the new rack being added?
 If existing cluster has BDA Plugin, ASR , Audit Vault, On Disk Encryption ..etc installed then are these components installed on the new rack being added?
 If decommissioned nodes from one cluster are being expanded into a second cluster is it necessary to reimage them?
 What is the sample output of the expansion command?
References

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