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🔄 '''Failover''' is the automatic or semi-automatic transfer of operations from a primary system, server, or component to a standby redundant system when the primary one fails or becomes unavailable. Insurance operations depend on continuous system availability — a [[Definition:Policy administration system (PAS) | policy administration platform]] that goes offline during a renewal cycle, a [[Definition:Claims management system | claims system]] unreachable after a catastrophe surge, or a payment processing engine that fails on premium collection day can cause immediate financial loss, regulatory exposure, and [[Definition:Policyholder | policyholder]] dissatisfaction. Failover mechanisms are the engineering safeguard that ensures these critical insurance systems can continue operating, often within seconds, even when hardware fails, software crashes, or an entire data center becomes inaccessible.

⚙️ Insurance technology environments typically implement failover at multiple layers. At the infrastructure level, database clusters use active-passive or active-active configurations so that if the primary database node hosting [[Definition:Underwriting | underwriting]] or [[Definition:Claims | claims]] data becomes unresponsive, a replica node assumes the workload with minimal data loss. At the application tier, load balancers detect when a web server serving a [[Definition:Self-service portal | self-service portal]] or [[Definition:Broker | broker]] trading platform stops responding and redirect traffic to healthy instances. At the site level, [[Definition:Disaster recovery (DR) | disaster recovery]] architectures replicate entire environments to geographically separated data centers or [[Definition:Cloud computing | cloud]] regions, enabling failover of complete operations if a primary site is compromised by a natural disaster, power outage, or cyberattack. The recovery time objective (RTO) — the maximum acceptable downtime — varies by system criticality; real-time [[Definition:Digital distribution | digital distribution]] platforms may target near-zero RTO, while batch-oriented reporting systems may tolerate longer gaps.

⏱️ For insurers, the stakes of inadequate failover design extend beyond operational inconvenience. Regulators in major markets — including the Prudential Regulation Authority in the UK, the Monetary Authority of Singapore, and U.S. state insurance departments adopting NAIC cybersecurity guidelines — increasingly scrutinize operational resilience, expecting carriers to demonstrate that critical business services can withstand component failures without material disruption. [[Definition:Lloyd's of London | Lloyd's]] market participants must meet specific business continuity and technology resilience standards. Additionally, insurers that write [[Definition:Cyber insurance | cyber]] and [[Definition:Business interruption insurance | business interruption]] coverage must understand failover architectures intimately — both to evaluate the resilience of their [[Definition:Insured | insureds]] and to model their own exposure to systemic technology failures. As the industry migrates to [[Definition:Cloud computing | cloud-native]] architectures, failover capabilities have become more sophisticated and accessible, but the fundamental principle remains unchanged: unplanned downtime in insurance is not merely a technical event but a business and regulatory one.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:High availability (HA)]]
* [[Definition:Disaster recovery (DR)]]
* [[Definition:Business continuity planning (BCP)]]
* [[Definition:Cloud computing]]
* [[Definition:Operational resilience]]
* [[Definition:Cyber insurance]]
{{Div col end}}

Definition:Failover - Revision history

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