Meta· Llama / infrastructure

Lights Out, Systems On: Validating Instant Power Loss Readiness

We’re introducing Instantaneous PowerLoss Storm, a new testing paradigm within Meta’s infrastructure for handling and mitigating instant or zero-notice power loss in our data centers. We’re sharing: how we built readiness to tolerate instant failures into our existing systems with defense-in-depth strategies; tradeoffs made in implementing it, and how we validated our readiness. Disaster preparedness is not optional. Hurricanes, wildfires, power supply and network disruptions, and countless more disaster scenarios all pose risks to our data center (DC) infrastructure. Early warning systems and tried-and-tested mitigation strategies already serve us well in situations where we have a few hours or more advanced warning. While these strategies have matured over time as we have expanded our DC presence, the ever-increasing size and variety of our infrastructure has demanded an increased level of preparedness for zero-notice disasters (ones that occur without any warning), such as instantaneous power loss , with minimal impact to overall fleet availability . Instantaneous PowerLoss Storm is a new testing paradigm within Meta’s long-established Disaster Readiness (DR) “ Storm …

Announced

03 Jun 2026 17:00 UTC