Comprehensive and Detailed In-Depth

In NIOS, the upgrade process for a Grid can be customized using Upgrade Groups, which allow

administrators to define the order and timing of upgrades for Grid members based on criteria like

location or role. By default, the Grid Master (active node) upgrades last to ensure continuity, and

passive nodes in HA pairs often upgrade before active nodes. However, when custom Upgrade

Groups are defined (as in this scenario, based on physical location), the upgrade sequence follows

the administrator’s configuration rather than a fixed rule. Thus, the first node to upgrade depends

entirely on how the Upgrade Groups are prioritized in the upgrade schedule. This flexibility is a focus

of the INE course’s Grid deployment section.

Reference: Infoblox NIOS Administrator Guide – Software Upgrades; INE Course Objective: NIOS DDI

Grid Deployment.