All technological notes.
Configure your database for maximum recoverability by:
control filesredo log groupsredo logsTo provide the best protection for your data, you must:
control files:
control files associated with a database are identical.control file is not difficult; recovering from the loss of all control files is much more challenging.redo log groups:
redo log information is used to roll data files forward to the last committed transaction.redo log group; if possible, each copy should be under different disk controllers. archived copies of redo logs:
redo information after it has been written to the data files.redo information in archived copies of the redo logs. This is known as placing the database in ARCHIVELOG mode. You can perform configuration tasks in Enterprise Manager Cloud Control or by using the SQL command line.