Resilience, traditionally viewed as a one-time setup involving disaster recovery and failover tests, is undergoing a transformation. The operational reality of systems often drifts from their initial architectural designs, leading to vulnerabilities even when diagrams suggest a resilient setup. This drift can manifest as health probes pointing to single dependencies or application connection strings pinned to one region despite database failover capabilities.
The critical dependencies that can break a workload are no longer solely infrastructure-based. In the AI era, AI models, inference endpoints, retrieval pipelines, and services operating under capacity constraints are becoming primary points of failure. A workload can appear healthy from an infrastructure perspective but fail its users if these AI-related dependencies are unavailable, throttled, or economically impractical.
The assumption that architecture diagrams are drawn and read by humans is also changing, as are the deterministic nature of dependencies. This complicates the process of knowing if an estate is resilient. The focus is now on continuously validating resilience at scale, ensuring that hundreds of workloads still match their design and can prove their resilience over time, rather than just having a recovery plan on paper.
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Resilience validation is changing in the AI era, moving beyond traditional disaster recovery plans focused on infrastructure. The new challenge involves continuously validating resilience at scale, especially as critical dependencies shift to AI models and inference endpoints.