| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
 |
 | |||
| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
|
| |||
Home -> Community -> Mailing Lists -> Oracle-L -> RE: Archive files and their Management
The key to the issue is very simple, Redo Logs (including archived) contain
information that cannot be recovered by other means (unless you capture
EVERY statement issued). As such, they are to be protected at all costs. The
vast majority of unrecoverable databases that I have dealt with have not
been because of data files or control file problems, but archived redo logs.
If you have redo logs, you can recreate database files that are empty and
apply all tx to them. If you are missing a log or it cannot be read, your
recovery stops at that point. It is possible to open a database with out
having recovered all tx, but this is not a production level scenario...it is
a 'we have tried everything else and if this doesn't work I'm Flipping
Burgers at McDonalds.
So, off my soapbox...
Uncompressed archive logs are on at least 2 different backup tapes/alternate
media
Compressed archive logs are on at least 3 different backup tapes/alternate
media
Once an archive log has been backed up 5 times, it can be deleted.
Dan Fink
-----Original Message-----
Sent: Friday, October 18, 2002 4:29 AM
To: Multiple recipients of list ORACLE-L
Greetings Gurus
Just wondering.......
Our archive log's directory has grown substantially and space is becoming an
issue.
How do you know which archive files is safe to delete?
In other words...
Do you delete all archive files older than the last backup?
Should you keep all archive files until it is obviously pointless?
Please advise.
Many thanks
Denham Eva
Oracle DBA
"UNIX is basically a simple operating system, but you have to be a genius to
understand the simplicity."
Dennis Ritchie.
DISCLAIMER This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. TFMC, its holding company, and any of its subsidiaries each reserve the right to monitor and manage all e-mail communications through its networks.
Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be views of any such entity.
This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit <http://www.marshalsoftware.com> www.marshalsoftware.com
-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Fink, Dan INET: Dan.Fink_at_mdx.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).Received on Fri Oct 18 2002 - 12:24:40 CDT
 |
 |