This is the first of many comparisons and commentaries on data protection within the hybrid cloud. We are looking at the mechanisms used to achieve data protection. Mechanisms—how boring—yet from an architectural and data management view, mechanisms become increasingly important. The mechanisms available can impact the costs of your data protection. One example: it is often thought that data protection is instantaneous. It isn’t. It has a window of execution measured in hours, not microseconds. If you need microsecond data protection, you may need other tools to fill that need.
The first things to decide are what you need in the way of time to recover your application (recovery time objective, or RTO) as well as how much data loss you can stomach during recovery (recovery point objective, or RPO). RPO determines how often data protection should be used, while RTO governs how soon recovery will be completed once started. This pair of critical factors will control what mechanisms are important within your organization. Beyond those two, there are other, equally important mechanisms that influence the types of recovery mechanisms in use.