ORA-00245: control file backup failed; target is likely on a local file system
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1.问题描述
警告日志报错如下：
Thu Feb 18 01:59:48 2016
Errors in file/u01/PSPROD/oracle/diag/rdbms/psprod/PSPROD1/trace/PSPROD1_ora_45856.trc:
ORA-00245: control file backup failed;target is likely on a local file system
Tue Feb 16 01:59:02 2016
Errors in file/u01/PSPROD/oracle/diag/rdbms/psprod/PSPROD1/trace/PSPROD1_ora_88792.trc:
ORA-00245: control file backup failed;target is likely on a local file system
2.问题分析
本报错出现于oracle 11.2.0.1.0及以后的版本中，应用于所有平台
仅仅RAC环境会发生，非rac环境不需要考虑这个问题，因为11Gr2控制文件备份机制的改变，集群中的任何实例都要可以写入快照文件。当然这个文件也就要对所有实例可见，所以这个快照文件要设置在共享设备上（asm磁盘组）。
我们现在看一下本机设置：
RMAN> show all;
RMAN configuration parameters for databasewith db_unique_name PSPROD are:
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICETYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FORDEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED;
CONFIGURE ENCRYPTION FOR DATABASE OFF; #default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; #default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' ASOF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TONONE; # default
CONFIGURE SNAPSHOTCONTROLFILE NAME TO '/u01/PSPROD/oracle/product/11.2.0.4/dbs/snapcf_PSPROD1.f';# default
RMAN>
由上可见本机是默认的未进行修改过
因此会报245的错误
这里注意下本机报错为ORA-00245，但也可能报ora-245 所以在mos上搜索的时候最好报错内容也搜索下，否则可能找不到
3.解决方案
修改rman备份配置，将控制文件快照定向到共享磁盘组
- RMAN> CONFIGURE SNAPSHOT CONTROLFILE NAME TO '+DATA_ERP/PSPROD/snapcf_PSPROD1.f';
- new RMAN configuration parameters:
- CONFIGURE SNAPSHOT CONTROLFILE NAME TO '+DATA_ERP/PSPROD/snapcf_PSPROD1.f';
- new RMAN configuration parameters are successfully stored
- RMAN>
检查修改结果：
RMAN> show all;
RMAN configuration parameters for databasewith db_unique_name PSPROD are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1;# default
CONFIGURE BACKUP OPTIMIZATION OFF; #default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; #default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FORDEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 5BACKUP TYPE TO BACKUPSET;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICETYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FORDEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED;
CONFIGURE ENCRYPTION FOR DATABASE OFF; #default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; #default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' ASOF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TONONE; # default
CONFIGURE SNAPSHOTCONTROLFILE NAME TO '+DATA_ERP/PSPROD/snapcf_PSPROD1.f';
RMAN>
注：只需要在RAC的一个节点上修改即可