Recovery testing

Recovery testing is a software and systems testing discipline that evaluates how well an application or infrastructure can recover from unexpected failures, crashes, or other catastrophic events. The goal is to verify that the system is capable of restoring itself — or of being restored with minimal manual intervention — to a fully operational state within an acceptable timeframe.

Multiple types of failures can be simulated during recovery testing, including but not limited to hardware failures, network outages, data corruption, or sudden loss of power. A key component of recovery testing is confirming that backups are valid and that services can be successfully and completely restored from them. A backup that cannot be reliably restored offers no real protection.

Beyond simply checking that recovery is possible, recovery testing also measures how fast recovery can be achieved — a metric often formalized as the Recovery Time Objective (RTO). Systems with high [availability] requirements must demonstrate that they can return to service quickly enough to meet operational or contractual obligations.

Recovery testing is closely related to [disaster recovery] planning and business continuity management, and is especially critical for applications handling sensitive or [mission-critical] data.

Recovery testing is best conducted in a controlled environment that realistically simulates failure conditions, rather than left untested until a real incident occurs.