December 2013
Intermediate to advanced
1872 pages
153h 31m
English
book
Microsoft® SQL Server 2012 Unleashed
by Ray Rankins, Paul T. Bertucci, Chris Gallelli, Alex T. Silverstein
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The Recovery Process
When SQL Server is started, it verifies that completed transactions recorded in the log are reflected in the data and that incomplete transactions whose changes are reflected in the data are rolled back out of the database. This is the recovery process. Recovery is an automatic process performed on each database during SQL Server startup. Recovery must be completed before the database is made available for use.
The recovery process guarantees that all completed transactions recorded in the transaction log are reflected in the data and all incomplete transactions reflected in the data are rolled back. During recovery, SQL Server looks for the last checkpoint record in the log. Only the changes that occurred or were still open ...