RE: RMAN: backup archivelog until time 'sysdate-2' delete input

  • From: "Roger Xu" <roger_xu@xxxxxxxxxxx>
  • To: "Spears, Brian" <BSpears@xxxxxxxxxxxxxxxxx>, <DWILLIAMS@xxxxxxxxxxxxx>, "Oracle-L@Freelists. Org (E-mail)" <oracle-l@xxxxxxxxxxxxx>
  • Date: Tue, 12 Oct 2004 15:20:38 -0500

'sysdate -2' is different from what I thought it was! Thanks, Brian.
SQL> !date
Tue Oct 12 15:20:40 CDT 2004
SQL> select to_char(sysdate-2,'DD-MON-YYYY HH24:MM:SS') from dual;
TO_CHAR(SYSDATE-2,'D
--------------------
10-OCT-2004 15:10:42
SQL> !date
Tue Oct 12 15:20:45 CDT 2004

-----Original Message-----
From: Spears, Brian [ mailto:BSpears@xxxxxxxxxxxxxxxxx]
Sent: Tuesday, October 12, 2004 8:41 AM
To: DWILLIAMS@xxxxxxxxxxxxx; Roger Xu; Oracle-L@Freelists. Org (E-mail)
Subject: RE: RMAN: backup archivelog until time 'sysdate-2' delete input


I did backup archivelogs to disk Roger.  I did find that the same
confusion you have found.

I used  select to_char(sysdate-2,'DD-MON-YY:HH.MM.SS') from dual; when
it was run to make sure it was the time range I expected.

Note: before you do that command ...make sure you do this one..

sql 'alter system archive log current';

Brian

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[ mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of DENNIS WILLIAMS
Sent: Tuesday, October 12, 2004 8:52 AM
To: roger_xu@xxxxxxxxxxx; Oracle-L@Freelists. Org (E-mail)
Subject: RE: RMAN: backup archivelog until time 'sysdate-2' delete input


Roger - I don't see where you mentioned your Oracle version. RMAN has
been notorious for being picky about the date format. I've generally
heard of this in terms of recovery times and with Oracle 8i. Since I
back up RMAN to disk, I don't use RMAN to backup the archive logs, so I
haven't encountered this specific problem. Looking at Freeman's great
Oracle9i Backup and Recovery, he uses the syntax:
        'backup archivelog from time 'sysdate - 1';

Dennis Williams
DBA
Lifetouch, Inc.

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[ mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of Roger Xu
Sent: Monday, October 11, 2004 4:55 PM
To: Oracle-L@Freelists. Org (E-mail)
Subject: RMAN: backup archivelog until time 'sysdate-2' delete input

Hi list,

It was "Mon Oct 11 16:12:07 CDT 2004" and I ran the following

RMAN> run {
2>      backup
3>       format '/oback/obckp/redo-logs/DV2_%s_%p.logs'
4>       archivelog until time 'sysdate-2' delete input;
5>     }

Since I specified "sysdate-2", I expected it only archive/delete up to
"Oct 09 16:12:06". Was I right? But the truth is it archived/deleted
redo file "1_1440.dbf", which was created
between "Mon Oct 11 00:12:40 2004" and "Mon Oct 11 00:42:39 2004". WHY?

My last three redo files was:
.. .. ..
Sat Oct  9 06:23:22 2004
.. .. ..
Creating archive destination LOG_ARCHIVE_DEST_1:
'/oracle/DV2/saparch/DV2arch/1_1439.dbf'
Sat Oct  9 06:23:34 2004
.. .. ..
Mon Oct 11 00:12:40 2004
.. .. ..
Creating archive destination LOG_ARCHIVE_DEST_1:
'/oracle/DV2/saparch/DV2arch/1_1440.dbf'
.. .. ..
Mon Oct 11 00:42:39 2004
.. .. ..
Mon Oct 11 15:39:37 2004
.. .. ..
Creating archive destination LOG_ARCHIVE_DEST_1:
'/oracle/DV2/saparch/DV2arch/1_1441.dbf'
Roger Xu
Database Administrator
Dr Pepper Bottling Company of Texas
(972)721-8337


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