Cloud Architecture

Pilot Light DR Pattern for Low-Cost Backups

Cloud Architecture diagram · made in Skemio

Pilot Light architecture showing primary cloud region replicating database to a standby region with dormant compute deployed via IaC upon failover.
Pilot Light architecture showing primary cloud region replicating database to a standby region with dormant compute deployed via IaC upon failover.
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What it shows

  • Compute infrastructure in the standby region is zeroed out or dormant.
  • Continuous database replication maintains up-to-date data state.
  • Terraform or CloudFormation spins up application tiers during disaster.

The takeaway

Pilot Light drops idle costs to near-zero while keeping data current; RTO is bounded by provision time.

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