How does the TIBCO iProcess Engine installer detect a slave node installation?

How does the TIBCO iProcess Engine installer detect a slave node installation?

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Article ID: KB0085428

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Updated On:

Products Versions
TIBCO iProcess Engine (Oracle) -
Not Applicable -

Description

Resolution:
The installer is always invoked as a new installation. For a new installation, the installation policy "Install files only" is not provided as an option. For a slave node installation, choose the installation policy "Install schema and files". After entering the database details for the existing node, the Installer detects the existence of the iProcess database. 

WARNING: iPE Tables already exist for user

The installer next detects this server can be added as a slave, as it does not exist on the node_cluster table.

This machine ($IPEI_HOSTNAME) is not in the NODE_CLUSTER table.
Do you want to install it as another machine in this cluster? 

When choosing 'Yes' in the above prompt, the installation process has now detected this as a slave node installation. 

Issue/Introduction

How does the TIBCO iProcess Engine installer detect a slave node installation?

Additional Information

TIBCO iProcess Engine for UNIX Installation Guide - https://docs.tibco.com/pub/iprocess-engine/11.4.1/doc/pdf/TIB_ipe_unix_11.4.1_installation.pdf
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