RE: Confusion why online redo logs should never be backed up.

I would say the book is wrong. If you are doing a cold backup, and the db is not shutdown properly you would need the current log to completely recover the instance. Technically the DB should be shutdown properly before backing up. However I am not willing to stake the recoverability of an important database on that ASSUMPTION. Backing up the redo logs during a cold backup is simply insurance. Since it is easy to do why risk not doing it?

I would add that the above doesn't apply to hot backups. The important thing there is to remember to force a log switch after backing up your datafiles, so that your archived logs contain all redo that occurred during your online backup.

I should also note that all my backup experience is related to backup scripts I wrote myself, and doesn't necessarily extend to the usage of rman.

Steve McClure

-----Original Message-----
Rick_Cale_at_teamhealth.com
Sent: Thursday, May 22, 2003 11:27 AM
To: Multiple recipients of list ORACLE-L

Hi All,

In Oracle8i Backup & Recovery Handbook pg 13 it states "Finally, online redo log files should never be backed up....So, it is good practice not to back up online log files for ANY kind of backup.

Can someone clearly explain why this is recommended?

Thanks
Rick

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