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Home -> Community -> Mailing Lists -> Oracle-L -> RE: rman restore & arclogs
Interesting. Does rman ever get confused during a restore or does it just grab the most convenient backup set with the required archive logs on it? I don't suppose you can parallel restore your arclogs from different files/tapes? (There goes that monkey again)
Thanks for your response Jim.
Lisa
-----Original Message-----
From: HAWKINS, JAMES W [IT/1000] [SMTP:james.w.hawkins_at_pharmacia.com] Sent: Monday, December 03, 2001 2:51 PM To: Multiple recipients of list ORACLE-LSubject: RE: rman restore & arclogs
I just wanted to throw something else out there - it may have already come up though. We backup the archivelogs first without deleting them, and then immediately backup another set with the "delete" specified. Obviously, this is because anything can happen to that first set (corruptions, etc.), and if that's your only set, then you're screwed. The chances of the same archivelog being corrupt in both sets is very low (unless the source archivelog is corrupted), but at least you are protected against all the copy errors. Also, it's very probable (for us, anyway) that each copy of the archivelog will be on different physical tapes, which in itself is important to us since operations is outsourced ; )
Jim
Pharmacia Corporation
800 North Lindbergh Blvd.
St. Louis, Missouri 63167
Work (314) 694-4417 Cellular (314) 724-9664 Pager (314) 294-9797
james.w.hawkins_at_pharmacia.com
-----Original Message-----
From: Mercadante, Thomas F [mailto:NDATFM_at_labor.state.ny.us]
Sent: Monday, December 03, 2001 12:56 PM
To: Multiple recipients of list ORACLE-L
Subject: RE: rman restore & arclogs
Lisa,
I guess I'm lazy (or cautious) in that I would allow the first backup to take this archive log files back to tape where they belong, rather than determine (by running reports) which log files I may delete (by hand).
The cautious part of me says that if Rman decided to back these monkeys up within the first save set after the recovery, it may have decided that it needs them for a future recovery. If you did remove them by hand, Rman may complain that it was expecting them and did not find them. Did you try this - remove one that was restored by the recovery process and then tried a backup?
Depending on the kind of restore you do - a full, or a point in time - the archivelog may be of no use anyway (a point in time makes them invalid because you had to perform an "open db reset logs", while a full restore could still use these again).
Glad you are at least experimenting with the tool before you put it in production - it actually is fun to do a restore as it happens so infrequently!
Good Luck!
Tom Mercadante
Oracle Certified Professional
-----Original Message-----
From: Koivu, Lisa [mailto:lisa.koivu_at_efairfield.com]
Sent: Monday, December 03, 2001 10:30 AM
To: Multiple recipients of list ORACLE-L
Subject: rman restore & arclogs
Good morning all -
I've been practicing rman restores. It's a lot easier than I originally thought. I've noticed that when you restore and the arclogs are needed, it restores them. Which is expected. However, when I take another backup, these arclogs are included in the backup set. This is unnecessary in my opinion and makes my backup files larger than they need to be.
Is it standard practice to just delete the arclogs that were already in a backup set prior to taking the immediate backup after a recovery? I can verify what arclogs are where in the backup sets with a report.
Any comments are appreciated. Thanks
Lisa Koivu
Oracle Database Monkey
Fairfield Resorts, Inc.
954-935-4117
Received on Mon Dec 03 2001 - 14:56:12 CST
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