IBM i Backup Software Architecture: Agent-Based, Agentless, and Hybrid Models

Agent-based versus agentless deployment

Agent-based backup software installs collection components directly on the IBM i partition, which often gives deeper control over object-level detail, IFS handling, and job sequencing. Agentless designs reduce what has to be installed and maintained on production partitions, which appeals to teams with limited administrative bandwidth, but can trade away some fine-grained control.

Neither model is universally better. The right choice depends on how much administrative overhead the team can absorb versus how much granular control the environment needs.

Local, offsite, and isolated layers still apply

Regardless of deployment model, strong backup software architecture supports three layers: a fast local target for routine restores, an offsite copy for site-level resilience, and an isolated or immutable copy for ransomware and cyber recovery. Buyers should confirm the software can orchestrate all three natively, rather than requiring separate tools stitched together after the fact.

• Fast local recovery for deleted objects or failed batch jobs
• Offsite copy for site loss or regional disruption
• Isolated or immutable copy for ransomware and compromise scenarios

Administrative separation is an architecture decision too

If the same credentials that manage production can also delete or modify backup copies, the architecture is too flat regardless of which deployment model is used. Buyers should ask how the software supports separated administrative roles between production and backup management, since that separation is often what determines whether a ransomware event stays contained.