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Cloud Disaster Recovery — Strategies

01. 09. 2025 Updated: 24. 03. 2026 1 min read intermediate

Cloud Intermediate

Cloud Disaster Recovery — Strategies

Disaster RecoveryRTORPOBusiness Continuity 5 min read

DR strategies, RTO/RPO, multi-region setup and testing.

Strategies

  • Backup & Restore — RPO/RTO hours, cheapest
  • Pilot Light — core infra ready, RPO minutes, RTO tens of minutes
  • Warm Standby — scaled-down copy, RPO seconds, RTO minutes
  • Active-Active — RPO/RTO ~0, most expensive

Multi-Region

# RDS cross-region replica
resource "aws_db_instance" "dr" {
  provider            = aws.us_east_1
  replicate_source_db = aws_db_instance.primary.arn
  instance_class      = "db.r6g.large"
}
# + S3 CRR + ECR replication + Route 53 failover

Testing

  • Tabletop — quarterly
  • Functional failover — semi-annually
  • Full-scale — annually
  • A DR plan without testing = no plan at all

Summary

Define RTO/RPO per app, choose the strategy, test regularly.

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We build core systems and AI agents that keep operations running. 15 years of experience with enterprise IT.