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.

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