August 2012
Intermediate to advanced
1416 pages
33h 39m
English
book
Microsoft SQL Server 2012 Bible
by Adam Jorgensen, Jorge Segarra, Patrick LeBlanc, Jose Chinchilla, Aaron Nelson
Content preview from Microsoft SQL Server 2012 Bible
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Summary
Database snapshots enable you to create point-in-time, read-only versions of a database. You can use them for reporting, recovery, and comparison functionality. Some key takeaways from this chapter follow:
- Database snapshots enable maintaining readable point-in-time versions of a production database for reporting and recovery purposes.
- Database snapshots enable reporting on the mirror database that is not otherwise possible.
- Database snapshots enable you to restore the database to a specific point in time.
- Although database snapshots are powerful and flexible, they are I/O-intensive. If multiple database snapshots are created on a source database that is heavily updated, the I/O load increases and may impact the performance of the system.
Like any other feature, it is highly recommended you get a performance baseline of the environment before and after creating database snapshots and let your performance data help you decide whether or not you should use database snapshots.
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