Chapter 2. Data Protection by the Numbers
Numbers make everything equal.
That applies to the wide range of data protection technologies, though it does not imply that synchronous storage arrays are equal to nightly tape backup. What we should think about is that comparative metrics like RPO allow us to look at that range of availability and protection alternatives objectively, without the bias of vendor preference, past experience, or preconceptions. We'll explore those kinds of comparative metrics in this chapter.
In this chapter, we will look at several metrics. We'll define each one and apply it to the discussion of what kinds of data protection and availability you need for different scenarios.
The Technical Metrics: RPO and RTO
When comparing ...
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