From: Stuart Oliver, Advanced Solutions Manager
To continue our disaster recovery blog series, I think it is important to explain a few common terms:
- Recovery Time Objective: (RTO) refers to the amount of time required to re-establish an application for end user access from the point of time where the application failed.
- Recovery Point Objective: (RPO) refers to the amount of data an application “owner” is prepared to lose.
In addition to RTO and RPO there are two other key terms that are often misunderstood and therefore incorrectly used:
- Restorable is a word used to describe an application that can only be re-built to the point of when the last available backup was completed.
- Recoverable is used to describe an application that can be re-built to the point of time when the original disaster occurred.
The key issue to understand here is that a recoverable environment is much more advantageous to a customer than a restorable solution, yet today the vast majority of organizations are still using restore centric services.
To add to the complexity, as applications have become more sophisticated ,the number of dependencies between separate systems have grown rapidly and the nature of these interconnections have also become more sensitive to failure – most mission-critical applications are interconnected to the point where they appear as one business system.
For many companies, the role of the Disaster Recovery Coordinator is rapidly reaching an end. Companies don’t want to spend monthly planning for an annual recovery test that for the most part has become irrelevant.
Therefore, companies are looking for new ways to address the availability of their critical applications. As discussed previously, the approach companies have taken to planning for disasters has quickly become obsolete as the interconnectedness between business systems has increased.
What Hosting.com did was to design a solution that addresses this interconnectivity and is backed by one of the industry’s most aggressive application-level SLAs. I invite you to take a closer look at our Critical Availability Service to see how Hosting.com is guaranteeing the availability of mission-critical applications.