DBID in Control File AutoBackup

Question

Documentation states that the format for the controlfile autobackup contains the DBID of the database. See: http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/setup004.htm#i1017907
<quote>
3.4.7.1 Configuring the Control File Autobackup Format
By default, the format of the autobackup file for all configured devices is the substitution variable %F. This variable format translates into c-IIIIIIIIII-YYYYMMDD-QQ, where:
--- IIIIIIIIII stands for the DBID.
--- YYYYMMDD is a time stamp of the day the backup is generated
--- QQ is the hex sequence that starts with 00 and has a maximum
</quote>
When I look at this on my machine I don't see that relation:
SYS@bluebase>select dbid from v$database;
DBID
2842031076
and:
[oracle@blue ~]$ rman target / catalog rman/****@catbase
Recovery Manager: Release 10.2.0.1.0 - Production on Sat Feb 9 13:00:34 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: BLUEBASE (DBID=2842031076)
connected to recovery catalog database
RMAN> show controlfile autobackup;
RMAN configuration parameters are:
CONFIGURE CONTROLFILE AUTOBACKUP ON;
<cut>
Starting Control File and SPFILE Autobackup at 09-02-08 13:03:11
piece handle=/flash/BLUEBASE/autobackup/2008_02_09/o1_mf_s_646232592_3tv5n0hm_.bkp comment=NONE
Finished Control File and SPFILE Autobackup at 09-02-08 13:03:13
</cut>
I can not relate the piece name to the DBID?
Thanks.

Answer 1

Thank you!
Below a snippet that shows the behaviour you described.
(IMO this is a limitation in the CTRL/SPFILE Autobackup feature)
RMAN> show CONTROLFILE AUTOBACKUP;
RMAN configuration parameters are:
CONFIGURE CONTROLFILE AUTOBACKUP ON;
RMAN> show CONTROLFILE AUTOBACKUP format;
RMAN configuration parameters are:
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/dbatemp/autobackup/%F';
RMAN> backup datafile 3;
Starting backup at 09-02-08 14:20:58
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00003 name=/oradata/db/bluebase/sysaux01.dbf
channel ORA_DISK_1: starting piece 1 at 09-02-08 14:20:59
channel ORA_DISK_1: finished piece 1 at 09-02-08 14:21:14
piece handle=/flash/BLUEBASE/bluebase_ora_df646237258_s244_s1.bkp tag=TAG20080209T142058 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:16
Finished backup at 09-02-08 14:21:14
Starting Control File and SPFILE Autobackup at 09-02-08 14:21:14
piece handle=/dbatemp/autobackup/c-2842031076-20080209-02 comment=NONE
Finished Control File and SPFILE Autobackup at 09-02-08 14:21:17
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