# Disaster recovery * **RTO - Recovery Time Objective** - is the time it takes after the disruption to restore a business process to its service level. * **RPO - Recovery Point Objective** - is the acceptable amount of data loss measured in time before the disaster occurs. ### Disaster recovery strategies * **Backup and restore** - storing backup data on S3 and recover data quickly and reliably. * **Pilot light** - for quick recovery into AWS - quicker recovery times than backup and restore, because core pieces of the system are already running and are continually kept up-to-date * **Warm standby** - a scaled-down version of a fully functional environment is always running in the cloud. * **Multi-site** - run your infrastructure on another site, in an active-active configuration. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://notebook.iuriioapps.com/cloud/aws/high-availability/disaster-recovery.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.