How do I determine my RTO and RPO?

Start with a Business Impact Analysis: for each system, ask how long can the business survive without it (RTO) and how much data loss is acceptable (RPO). Critical systems like payment processing might need RTO of minutes and RPO of zero. Non-critical systems might accept hours or days. Cost increases as RTO/RPO decrease, so prioritise critical systems.

How often should I test disaster recovery?

Test critical system recovery at least twice per year, with full end-to-end DR tests annually. Tabletop exercises (walking through the plan without actually failing over) can be done quarterly. After any major infrastructure change, validate that DR still works. Untested DR plans frequently fail when actually needed.

Is cloud-based DR more cost-effective?

Yes, significantly. Traditional DR required maintaining a complete secondary data centre. Cloud-based DR allows you to maintain minimal standby infrastructure (pilot light) that scales up only during a disaster, reducing DR costs by 50-80% compared to physical secondary sites.

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Disaster Recovery

Also known as:DRbusiness continuity planningdisaster recovery planning

The set of policies, tools, and procedures for recovering technology infrastructure and systems after a disaster, ensuring business continuity in the event of catastrophic failure.

In-Depth Explanation

Disaster Recovery (DR) encompasses the strategies and processes for restoring IT systems and data access after a disruptive event. It ensures business continuity when primary systems become unavailable due to natural disasters, cyberattacks, hardware failures, or other catastrophic events.

DR planning components:

Risk assessment: Identifying potential threats and their impact
Business Impact Analysis (BIA): Determining which systems are critical
Recovery strategies: Defining how each system will be recovered
DR plan documentation: Step-by-step recovery procedures
Testing: Regular testing to validate the plan works
Communication: Notification procedures during a disaster

DR strategies by RTO:

Hot standby: Identical system running simultaneously (RTO: minutes)
Warm standby: Reduced-scale replica that can be scaled up (RTO: hours)
Cold standby: Infrastructure ready but not running (RTO: hours to days)
Backup and restore: Restore from backups to new infrastructure (RTO: days)

Cloud-based DR:

Pilot light: Minimal environment in cloud, scale up when needed
Multi-region: Applications deployed across multiple cloud regions
Cross-cloud: DR environment on a different cloud provider
DRaaS: Disaster Recovery as a Service from cloud providers

DR metrics:

RTO: Recovery Time Objective -- maximum acceptable downtime
RPO: Recovery Point Objective -- maximum acceptable data loss
MTTR: Mean Time to Recovery -- average actual recovery time
DR testing frequency: How often DR procedures are tested

Australian DR considerations:

Natural disaster risks (bushfire, flood, cyclone) vary by region
APRA Prudential Standard CPS 232 for regulated financial entities
ACSC guidance on business continuity
Consider DR sites in different Australian states for geographic diversity

Business Context

The average cost of IT downtime for Australian businesses is $5,600 per minute. A tested disaster recovery plan can reduce recovery time from days to hours, preventing catastrophic revenue and reputation losses.

How Clever Ops Uses This

Clever Ops designs and implements disaster recovery solutions for Australian businesses using cloud-based DR strategies. We build multi-region architectures, configure automated failover, and conduct regular DR testing to ensure businesses can recover quickly from any disruptive event with minimal data loss.

Example Use Case

"An Australian financial services company implements warm standby DR in Azure Melbourne region, with their primary systems in Azure Sydney. During a simulated disaster test, they achieve full failover in 45 minutes with zero data loss."