Vision Solutions, who recently merged with Syncsort, has been in the business of high availability and disaster recovery for more than two decades. The article below is an update to their popular blog post explaining how to calculate RPO and RTO for disaster recovery.
If you’re creating a disaster recovery plan, one of the first things you need to do is determine what you need to protect. All data is not created equal and there’s likely no reason to replicate and store every bit and byte on your servers.
The two primary methods of measuring the criticality of IT systems are how much data and time you can afford to lose, commonly referred to as RPO and RTO.
RPO: Recovery Point Objective
The first, the Recovery Point Objective is the threshold of how much data you can afford to lose since the last backup.
Defining your company’s RPO typically begins with examining how frequently backup takes place. Since backup can be intrusive to systems it is not typically performed more frequently than every several hours. This means that your backup RPO is probably measured in hours of data loss.
RTO: Recovery Time Objective
The second, the Recovery Time Objective is the threshold for how quickly you need to have an application’s information restored.
For example, maybe four 4 hours, eight 8 hours, or the next business day is tolerable for email systems. Keep in mind the amount of time it takes to provision servers, storage, networking resources and virtual machine configurations.
Choosing a Solution
Using these two primary measures will help you estimate your cost of downtime to better define your budget for an IT system continuity plan. Reviewing your RPO and RTO can also help you determine which technology will best meet your needs.
Finding the right balance of features and price to meet your RPO and RTO is one of the most critical things you can do to protect your business. For IT system continuity, there are three solution categories: backup, high availability and disaster recovery.
- Backup means keeping your data safe; in this situation, RPO is more critical than RTO.
- High availability means avoiding downtime and keeping your critical applications and data online – a high availability solution is required for high RPO and RTO
- Disaster recovery is the ability to recover data in case the production system is damaged, destroyed or becomes unavailable for an undeterminable period of time. A comprehensive disaster recovery solution that can restore data quickly and completely is required to meet low RPO and RTO thresholds.
Vision Solutions offers high availability and disaster recovery solutions to ensure you can keep critical apps online and restore any lost data in the event of a disaster. Download their free 2017 State of Resilience report to review the latest trends in disaster recovery planning.