A system's ability to recover quickly from failures and continue operating under adverse conditions. Like a boxer who gets knocked down but gets back up and keeps fighting.
A resilient e-commerce platform automatically reroutes traffic during server outages, reduces features during high load, and recovers from crashes within seconds to keep the store running.
Resilience is an architecture and operations goal rather than a single cloud service. All major clouds support resilience through building blocks like multi-zone/region deployment, load balancing, autoscaling, managed databases with replication, backups, and monitoring.