Note the following administrative considerations before converting single-instance databases to Oracle RAC:
Backup procedures should be available before converting from a single-instance Oracle Database to Oracle RAC. This includes taking a backup of your existing database before converting to Oracle RAC and being prepared to backup your Oracle RAC database immediately following the conversion.
For archiving with Oracle RAC environments, the archive file format requires a thread number.
The archived logs from all instances of an Oracle RAC database are required for media recovery. Because of this requirement, if you archive to a file and you do not use a cluster file system, or some other means to provide shared file systems, then you require a method of accessing the archive logs from all nodes on which the cluster database has instances.
By default, all database files are migrated to Oracle Managed Files. This feature simplifies tablespace creation, ensures data file ___location consistency and compliance with Oracle Flexible Architecture rules, and reduces human error with data file management.