The traditional meaning of resilience is akin to “keeping the lights on” referring to the ability to restart or recover physical infrastructure, such as a server, network switch, storage array or data center, in the event of an outage. This was often related to the data center's setup, including whether it had diverse power feeds, battery backups, or generators that were tested and ready to take on the full data center load if required.
This still matters - as evidenced by data center failures in the past year that led to prolonged outages of IT equipment and the digital service. But it’s no longer principally what is meant when businesses, governments, regulators, and others say that resilience postures need to be raised.
