Question: How does a differential backup know which extents have changed so that it can be very quickly run?
Answer: The DCM tracks changes. The differential backup reads the extents from this structure. A differential backup uses the Differential Change Map to determine which extents have changed and need to be include in the backup. This greatly speeds the differential backup process.
Question:
How does a differential backup know which extents have changed so that it can be very quickly run? Answer:
The DCM tracks changes. The differential backup reads the extents from this structure. A differential backup uses the Differential Change Map to determine which extents have changed and need to be include in the backup. This greatly speeds the differential backup process. Source: CoolInterview.com
If you have the better answer, then send it to us. We will display your answer after the approval.
Rules to Post Answers in CoolInterview.com:-
There should not be any Spelling Mistakes.
There should not be any Gramatical Errors.
Answers must not contain any bad words.
Answers should not be the repeat of same answer, already approved.
Answer should be complete in itself.
Related Questions
View Answer
When you create a new Message Type in the SQL Server 2005 Service Broker, what does the Authorization parameter signify?