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

There is one and to the best of my knowledge only one reason to backup online redo logs. If you have to use that particular backup to restore to a disaster recovery site and/or a fresh clean server you will need them. BTW: If at all possible they should be the LAST datafiles backed up other than the control file.

Dick Goulet
Senior Oracle DBA
Oracle Certified 8i DBA

-----Original Message-----
Sent: Thursday, May 22, 2003 3:13 PM
To: Multiple recipients of list ORACLE-L

It would probably be more appropriate to say, the usefulness of such a file is questionable.
because ...
The online log you are backing up might be the current log that is being written to while you are backing it up. Oracle can use logs to straighten out a data block that is being modified at the same time you are copying it to a backup. But oracle can't do that with online logs. You would need logs for the logs. Then you would wonder about backing up the logs for the logs. Which means you would need logs for the logs for the logs ....

> -----Original Message-----
>
>
> 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?
>

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Stephen Lee
  INET: Stephen.Lee_at_DTAG.Com

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Goulet, Dick
  INET: DGoulet_at_vicr.com

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).