In this Document
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Description |
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Occurrence |
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Symptoms |
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Workaround |
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Patches |
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History |
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References |
1. In RAC environment controlfile autobackup fails with ora-0245
Autobackup of controlfile in RMAN is failing with error:
RMAN-571: ===========================================================
RMAN-569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-571: ===========================================================
RMAN-3009: failure of Control File and SPFILE Autobackup command on
ORA_DISK_1 channel at 10/27/2010 12:13:31
ORA-245: control file backup operation failed
2. In RAC environment, backup controlfile to non shared location fails
SQL> ALTER DATABASE BACKUP CONTROLFILE TO '/home/rac1122/test/control.bk' REUSE
*
ERROR at line 1:
ORA-245: control file backup operation failed
3. In RAC environment backing up standby controlfile to non shared location fails
SQL> alter database create standby controlfile as '/home/oracle/renostdbycntrl.ctl';
alter database create standby controlfile as
'/home/oracle/renostdbycntrl.ctl'
*
ERROR at line 1:
ORA-245: control file backup operation failed
4. In RAC environment copy current controlfile to '${DB_BACKUP_DIR}/rac_tnctv_control.bak';
channel ch1: starting datafile copy
copying current control file
RMAN-571: ===========================================================
RMAN-569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-571: ===========================================================
RMAN-3009: failure of backup command on 10/07/2011 11:36:42 channel at ch1
ORA-245: control file backup operation failed
5. In RAC environment, Rman backup fails if snapshot controlfile is not in shared location.
RMAN-00571: ========================================================
RMAN-00569: ============ ERROR MESSAGE STACK FOLLOWS =============
RMAN-00571: =========================================================
RMAN-03009: failure of resync command on default channel at 03/13/2012 10:19:41
ORA-00245: control file backup operation failed
Only affect Real application Cluster (RAC), 11.2 onward.
In RAC environment any form of controlfile backup may fail with ORA-0245 if the location of the Snapshot Controlfile is not a shared location. The backup of the controlfile actualy makes a backup of the SNAPSHOT controlfile. The Snapshot controlfile is created when the controlfile is about to be backed up. The Snapshot controlfile is a read-consistent copy of the controlfile.
SOLUTION:
This is a RAC specific 'configuration' issue and the correct configuration is as described below
It is changed behaviour which requires that the snapshot controlfile in a RAC environment, is on a shared location.
1. Check the snapshot controlfile location:
RMAN> show snapshot controlfile name;
2. Configure the snapshot controlfile to a shared disk:
Or in case of ASM use
NA
02-07-2012 created and Published alert
07-12-2015 updated
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