ORA-00245: control file backup operation failed

今天朋友巡检遇到了ORA-00245的报错，下面来看看MOS关于RAC环境中ORA-00245报错的说明。

ORA-245: In RAC environment from 11.2 onwards Backup Or Snapshot controlfile needs to be in shared location (文档 ID 1472171.1)

 

修改时间:2013-11-11

类型:ALERT

 

In this Document

 

Description

Occurrence

Symptoms

Workaround

Patches

History

References

 

APPLIES TO:

oracle Database - Enterprise Edition - Version 11.2.0.1.0 and later

InfORMation in this document applies to any platform.

This issue is only applicable to RAC database.

 

From 11gR2 onwards, the controlfile backup happens without holding the controlfile enqueue. For non-RAC database, this doesn't change anything. But for RAC database, due to the changes made to the controlfile backup mechanism in 11gR2, any instance in the cluster may write to the snapshot controlfile. Due to this snapshot controlfile need to be visible to all instances. 

 

The snapshot controlfile MUST be accessible by all nodes of a RAC database, if the snapshot controlfile does not reside on a shared device error will be raised at the time of RMAN backup while taking snapshot of controlfile. 

 

This applies to backing up controlfile using sqlplus / having autobackup of controlfile configured on non

shared location.