Disaster Recovery

Disaster Recovery (DR)

The process of restoring systems, data, and network operations after a major outage or disaster.

Recovery Time Objective (RTO)

The maximum amount of time a system, service, or business process can be down after a disaster before it must be restored.

Recovery Point Objective (RPO)

The maximum amount of data loss that is acceptable after a disaster or outage.

Mean Time to Repair (MTTR)

The average amount of time required to repair a failed system or device and restore it to normal operation.

Mean Time Between Failures (MTBF)

The average amount of time a device or system operates before experiencing a failure.

Cold Site

A backup facility with power and space but no equipment or data, requiring significant setup before use.

Hot Site

A fully operational backup facility that can immediately take over if the primary site fails.

Warm Site

A backup facility with partial infrastructure that requires some restoration before becoming operational.

Failover

The automatic or manual switching to a backup system, device, or service when the primary one fails.

Site Resiliency

The ability of a site to withstand disruptions and maintain or quickly restore operations.