Discussion
Which of the following is the preferred way to recover a database after a system failure?
Answer: C
Correct answer: Switch to duplicate database
After a system failure the quickest route back to service is to switch to a duplicate - a mirrored or standby database kept in step with the original - so that operations continue while the failed copy is repaired. Rollforward from a backup and log is the fallback where no duplicate exists, and it takes far longer.
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