CLOUD / A CONCEPT NOTE
Multi-region & DR
surviving a region outage
Overview · mechanism
pitfall · examples
01 / THE SHORT VERSION
The idea in a few sentences.
Disaster Recovery (DR) models run across multiple geographic regions to survive full-datacenter outages. Strategies range from active-passive backup to active-active cross-region replication.
02 / FOLLOW THE MECHANISM
How region disaster rolls over
Data replication
databases write updates to active region and sync them to secondary region.
Total outage
active region goes completely offline (e.g. AWS us-east-1 shuts down).
Promotion
DR scripts promote secondary region database replica to primary status.
Route swap
DNS route records point global load balancer to the secondary region endpoint.
04 / COMMAND NOTES
Read the command, then the result.
Inspect the flags and arguments before trying an example. Snippets can need local setup, replacement values, or resources in your own environment.
list backups available for disaster recovery restoration
aws rds describe-db-cluster-snapshots05 / CHECK YOURSELF
Could you explain Multi-region & DR to a teammate?
Try it out loud in two sentences: what it is, and the one detail that changes the picture. If you stall, the gap is the part to reread.
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