About this interactive
The lesson lists what to weigh when designing backups: whether the data can be recreated, how critical it is, the cost, the RPO and RTO, the disruption, the backup windows, security, and how often the data changes.
Recreatable data can be built again. A server's operating system can be installed from the download, licensed again and set up again. It takes time, but nothing is lost for good.
Nonrecreatable data is gone once it is lost: customer records, who signed in and when, readings taken at a moment that will not come again.
Criticality is a separate question. Data can be recreatable and still critical, or nonrecreatable and of little importance, like statistics nobody uses.
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