How long can the system be unavailable? How much data can we afford to lose? The first answer helps...
How long can the system be unavailable?
How much data can we afford to lose?
The first answer helps define your Recovery Time Objective: how quickly service must return.
The second helps define your Recovery Point Objective: how far back your recoverable data may be.
“Immediately” and “nothing” are popular answers—until the cost of achieving them arrives.
Recovery requirements must be based on business impact, not optimism.
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