Hope Is Not a Disaster Recovery Plan
Every cloud provider experiences outages eventually, every application has bugs capable of corrupting data, and every organization eventually faces a scenario they didn’t specifically plan for. Disaster recovery planning isn’t pessimism — it’s the deliberate, honest work of deciding in advance, calmly, what “acceptable loss” actually means for your specific business, rather than discovering the true, uncomfortable answer during an actual live crisis.
RTO and RPO: The Two Numbers That Define Your Strategy
Recovery Time Objective (RTO) is how long you can tolerate being down before the business impact becomes genuinely unacceptable. Recovery Point Objective (RPO) is how much data loss you can tolerate, measured in time — losing the last five minutes of transactions is very different from losing the last 24 hours. These two numbers, honestly and specifically defined for your actual business context, drive essentially every subsequent disaster recovery architecture decision that follows.
Backup Strategy: 3-2-1 as a Starting Point
The classic 3-2-1 rule — three copies of data, on two different storage types, with one copy genuinely off-site — remains a solid baseline even in a cloud-native world. The cloud equivalent typically means backups in a different region from your primary infrastructure, and ideally in a different account or with different access credentials entirely, protecting specifically against an entire account compromise or a region-wide provider failure, not just routine hardware failure.
Testing Backups Is Not Optional
A backup that has never actually been restored is, for all practical purposes, unverified and not to be trusted — corrupted backups, incomplete backup coverage, and forgotten dependencies (like encryption keys stored somewhere that isn’t itself backed up) are all discovered far too often during an actual disaster, precisely the worst possible moment to discover them. Regular, genuinely scheduled restore drills, treated as seriously as fire drills, are what actually separates a disaster recovery plan that works under real pressure from one that merely exists as an untested document.
Multi-Region vs Single-Region with Backups
Full multi-region active-active architecture provides the strongest resilience against regional outages, but it’s genuinely expensive and architecturally complex, generally justified only for applications where downtime cost is extremely high, or specific regulatory or compliance requirements demand it. For most applications, a single primary region with a well-tested, genuinely reliable backup and restore process to a secondary region offers a far more reasonable, honest trade-off between resilience and actual engineering cost.
Runbooks: Removing Decision-Making Under Pressure
During an actual, live incident, stress and time pressure genuinely degrade decision-making quality — this is well-documented human behavior, not a hypothetical concern. Detailed, specific, pre-written runbooks for likely disaster scenarios remove the need to figure out complex recovery procedures from first principles while a system is actively down and stakeholders are actively asking urgent questions. A runbook doesn’t need to cover literally everything, but it should cover your most likely, highest-impact failure scenarios in real, actionable, step-by-step detail.
Communication Plans Matter as Much as Technical Recovery
A genuinely well-executed technical recovery undermined by poor, inconsistent communication still damages trust significantly. Deciding in advance who communicates with customers, what channels are used, and what level of technical detail is appropriate for different audiences removes yet another decision point during an already-stressful, time-pressured incident, and prevents the common failure mode of mixed, contradictory messaging reaching customers or stakeholders from different people within the organization.
Dependency Mapping: Know What You Actually Depend On
A disaster recovery plan that doesn’t account for third-party service dependencies (payment processors, email providers, authentication services) has a real, dangerous blind spot — your infrastructure might recover perfectly while a critical dependency remains down, and you never planned for that specific, entirely plausible scenario. Mapping genuine dependencies, including their own disaster recovery posture, is a frequently overlooked part of comprehensive planning.
Practical Recommendations
- Define RTO and RPO explicitly and honestly for each critical system — vague, unstated targets produce vague, inadequate plans.
- Schedule and actually run regular restore drills — an untested backup is not a real, trustworthy backup.
- Write detailed, specific runbooks for your most likely disaster scenarios, not just a generic, abstract policy document.
- Map and account for third-party dependencies’ own recovery posture as part of your overall planning.