You must empty the file periodically to prevent the log file from growing too large. A better practice is to log RMAN execution results in separate files based on dates, then you can easily to trace the problem by dates. The following is a sample script that you can use:. That RMAN command will connect to the database, set the logfile to whatever you want it to be, and run the cmdfile, which is your script.
Since you want to specify the spool log for RMAN, you can do this:. The tee command is used when you want to display output on the screen and also write the RMAN command output to a file. The tee command is very useful when you want UNIX script output re-directed to several locations. These commands apply the level 1 incremental backup taken a day before, create a new level 1 incremental backup, back up archived redo log files to the flash recovery area, and back up files created by the standby instance from the flash recovery area to tape.
On the primary database, use the following RMAN commands to back up the current control file and copy auto backups created by the primary instance to tape:. Issue these commands every day or once a week, depending on how much application of redo data can be tolerated in the event of loss of all current control files refer to Section Assuming that a complete database backup is taken every Sunday, the following commands can be issued on the standby database to take a level 0 database backup:.
On the other days of the backup cycle, run the following commands to create a level 1 incremental backup of the database and all archived redo log files that have not already been backed up 2 times:. The examples in the following sections assume you are restoring files from tape to the same system on which the backup was created. If you need to restore files to a different system, you may need to either change media configuration or specify different parameters on the RMAN channels during restore, or both.
Issue the following RMAN commands to restore and recover datafiles. You must be connected to both the primary and recovery catalog databases. Issue the following RMAN commands to restore and recover tablespaces. If all the archived redo log files required for recovery of damaged files are accessible on disk by the standby database, restart Redo Apply.
Issue the following RMAN commands to restore and recover datafiles on the standby database. You must be connected to both the standby and recovery catalog databases use the TARGET keyword to connect to standby instance :. Oracle software allows multiplexing of the standby control file. If one of the multiplexed standby control files is lost or is not accessible, Oracle software stops the instance and writes the following messages to the alert log:.
You can copy an intact copy of the control file over the lost copy, then restart the standby instance using the following SQL statements:. If all standby control files are lost, then you must create a new control file from the primary database, copy it to all multiplexed locations on the standby database, and restart the standby instance and Redo Apply.
The created control file loses all information about archived redo log files generated before its creation. Because RMAN looks into the control file for the list of archived redo log files to back up, all the archived redo log files generated since the last backup must be manually cataloged. Oracle software allows multiplexing of the control file on the primary database. If one of the control files cannot be updated on the primary database, the primary database instance is shut down automatically.
As described in Section If you lose all of your control files, you can choose among the following procedures, depending on the amount of downtime that is acceptable. An existing standby database instance can generate the script to create a new control file by using the following statement:.
Note that if the database filenames are different in the primary and standby databases, then you must edit the generated script to correct the filenames. This statement can be used periodically to generate a control file creation script. Do you know how to check or validate a particular archive log files suspect it might be corrupted. If you have set up multiplexing of the archived logs then RMAN will use the copy which is valid.
If there is no multiplexing of archived logs then RMAN will fail during a backup. No Account? Sign up. By signing in, you agree to our Terms of Use and Privacy Policy. Already have an account? Sign in. By signing up, you agree to our Terms of Use and Privacy Policy. Enter the email address associated with your account.
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