TAILIEUCHUNG - Oracle Database 11g New Features P2

Oracle Database 11g Getting Started or you can enter an alternative directory location for these files to be stored in. We will discuss the disgnostic_dest parameter and other new parameter-related information later in this chapter. As with previous versions of the DBUA, you can choose to have Oracle back up the database before the upgrade, or you can indicate that you have already backed up the database. If you allow the DBUA to back up the database, then the backup will be a cold backup, so be aware that you will be adding to the total time the database will be. | Chapter 1 Oracle Database 11 g Getting Started 11 or you can enter an alternative directory location for these files to be stored in. We will discuss the disgnostic_dest parameter and other new parameter-related information later in this chapter. As with previous versions of the DBUA you can choose to have Oracle back up the database before the upgrade or you can indicate that you have already backed up the database. If you allow the DBUA to back up the database then the backup will be a cold backup so be aware that you will be adding to the total time the database will be down for the upgrade if you are going to have DBUA perform the backup. If you want to perform your own backup I d suggest you use Recovery Manager RMAN to perform the backup. Oracle Press has a great book on RMAN called Oracle Database 10g RMAN Backup and Recovery that can guide you on your RMAN backup. Here is an example of an RMAN command that you can use to back up your database RMAN shutdown immediate RMAN startup restrict RMAN backup database plus archivelog format backup_destination_here tag before_upgrade RMAN shutdown immediate RMAN startup NOTE Of course backups are very important particularly when an upgrade fails for whatever reason. I d prefer to back up the database before the upgrade. If you are using RMAN you can validate the backup and make sure it s complete. If you have the time and resources I d do a test restore on the backup just to cover yourself completely. The DBUA also gives you the option of moving your database datafiles during the upgrade process if you so desire. You can move them from file system to file system from a file system to ASM or from ASM to a file system. Personally I think I d do this independent of an upgrade but that s just me. The DBUA also gives you the option of configuring the Flash Recovery Area FRA . This is particularly handy if you are moving from Oracle9i which did not offer the FRA or if you did not use the FRA in previous Oracle Database 10g

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