AWS › AWS Backup & Disaster Recovery
What are the four common disaster recovery strategies on AWS, including backup and restore and pilot light?
IntermediateAnswer
The backup and restore strategy is the simplest and cheapest, relying purely on restoring data from backups after a disaster, accepting a longer recovery time, pilot light keeps a minimal version of critical systems always running in a secondary region ready to be scaled up quickly, warm standby runs a fully functional but smaller scale version of the environment in a secondary region that can be scaled up rapidly, and multi site active active runs full production capacity in multiple regions simultaneously for the fastest possible recovery at the highest cost.
// Pilot light example: minimal database replica always running
// scaled up to full capacity only when disaster recovery is triggeredReal-world example An e commerce company uses a pilot light strategy, keeping a small replicated database always running in a secondary region, and only scales up the full application infrastructure in that region if its primary region experiences a major outage.