What happens when the database in backup Mode?


What happens when we kept the database in backup mode, by using the command "Alter database Begin Backup" means;

Thank you...

OK, now my query is whether Oracle freeze the data file header and information is stored in the log file of restoration by progression. So if my backup job continues for 30 min and at the same time someone did some update of database, then how these updates to the information written back to the data file after "Alter Database End Backup'.»

Oracle only blocks data file headers, no body. Modified blocks will be stored in data files (at control points) even in backup mode.
If checkpoint has not arrived yet after this update and validation, and DB has decreased, then when it will start it will redo-log automated recovery.

Published by: user11181920 on Sep 21, 2012 11:54

Tags: Database

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