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Microsoft® SQL Server 2012 Unleashed
book

Microsoft® SQL Server 2012 Unleashed

by Ray Rankins, Paul T. Bertucci, Chris Gallelli, Alex T. Silverstein
December 2013
Intermediate to advanced
1872 pages
153h 31m
English
Sams
Content preview from Microsoft® SQL Server 2012 Unleashed

Differential Database Backups

Differential database backups capture changes to any data extent that happened since the last full database backup. The last full database backup is referred to as the differential base and is required to make the differential backup useful. Each data extent that is monitored consists of eight physically contiguous data pages. As changes are made to the pages in an extent, a flag is set to indicate that a change has been made to the extent. When the differential database backup is executed, only those extents that have had pages modified are written to the backup.

Differential database backups can save backup space and improve the overall speed of recovery. The savings in space and time are directly related to the ...

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Publisher Resources

ISBN: 9780133408539Purchase book