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  • 小知识:RMAN备份当前控制文件报错ORA245

    在一个备份的case上遇到备份控制文件报错ORA-245,最终通过修改snapshot controlfile默认位置到ASM磁盘组后解决。

    1.问题复现

    回来后就想快速记录下这个小知识点,打开尘封的测试环境,结果测试环境上居然没复现?!
    RMAN> backup current controlfile format '/tmp/current_%d_%s_%p_%T.ctl';
    
    Starting backup at 12-JAN-22
    using channel ORA_DISK_1
    channel ORA_DISK_1: starting full datafile backup set
    channel ORA_DISK_1: specifying datafile(s) in backup set
    including current control file in backup set
    channel ORA_DISK_1: starting piece 1 at 12-JAN-22
    channel ORA_DISK_1: finished piece 1 at 12-JAN-22
    piece handle=/tmp/current_PROD_8_1_20220112.ctl tag=TAG20220112T174122 comment=NONE
    channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
    Finished backup at 12-JAN-22
    
    Starting Control File and SPFILE Autobackup at 12-JAN-22
    piece handle=/opt/app/oracle/product/11.2.0/dbhome_1/dbs/c-495072076-20220112-03 comment=NONE
    Finished Control File and SPFILE Autobackup at 12-JAN-22
    
    RMAN>
    

    再次尝试,在另外节点有业务的情况下,部分复现(备份控制文件ok,只是自动备份那里报错了):

    RMAN> backup current controlfile format '/tmp/current_%d_%s_%p_%T.ctl';
    
    Starting backup at 12-JAN-22
    using target database control file instead of recovery catalog
    allocated channel: ORA_DISK_1
    channel ORA_DISK_1: SID=59 instance=prod1 device type=DISK
    channel ORA_DISK_1: starting full datafile backup set
    channel ORA_DISK_1: specifying datafile(s) in backup set
    including current control file in backup set
    channel ORA_DISK_1: starting piece 1 at 12-JAN-22
    channel ORA_DISK_1: finished piece 1 at 12-JAN-22
    piece handle=/tmp/current_PROD_10_1_20220112.ctl tag=TAG20220112T174247 comment=NONE
    channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
    Finished backup at 12-JAN-22
    
    Starting Control File and SPFILE Autobackup at 12-JAN-22
    RMAN-00571: ===========================================================
    RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
    RMAN-00571: ===========================================================
    RMAN-03009: failure of Control File and SPFILE Autobackup command on ORA_DISK_1 channel at 01/12/2022 17:42:50
    ORA-00245: control file backup failed; target is likely on a local file system
    

    继续模拟在另外节点有业务的情况下(简单模拟就是在备份的时候疯狂去切日志),终于复现了(备份控制文件就报错ORA 245了):

    RMAN> backup current controlfile format '/tmp/current_%d_%s_%p_%T.ctl';
    
    Starting backup at 12-JAN-22
    using channel ORA_DISK_1
    channel ORA_DISK_1: starting full datafile backup set
    channel ORA_DISK_1: specifying datafile(s) in backup set
    RMAN-00571: ===========================================================
    RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
    RMAN-00571: ===========================================================
    RMAN-03009: failure of backup command on ORA_DISK_1 channel at 01/12/2022 17:43:28
    ORA-00245: control file backup failed; target is likely on a local file system
    

    2.解决方案

    当前默认配置:
    RMAN> show all;
    
    using target database control file instead of recovery catalog
    RMAN configuration parameters for database with db_unique_name PROD 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 FOR DEVICE TYPE DISK TO '%F'; # default
    CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
    CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
    CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
    CONFIGURE MAXSETSIZE TO UNLIMITED; # default
    CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
    CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
    CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
    CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
    CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/opt/app/oracle/product/11.2.0/dbhome_1/dbs/snapcf_prod1.f'; # default
    

    修改 SNAPSHOT CONTROLFILE 路径到ASM磁盘组中:

    RMAN> CONFIGURE SNAPSHOT CONTROLFILE NAME TO '+DATA/PROD/snapcf_prod1.f';
    
    new RMAN configuration parameters:
    CONFIGURE SNAPSHOT CONTROLFILE NAME TO '+DATA/PROD/snapcf_prod1.f';
    new RMAN configuration parameters are successfully stored
    

    再次测试,无论备份时另外节点如何疯狂去切日志,都会成功备份。

    AlfredZhao©版权所有「从Oracle起航,领略精彩的IT技术。」
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  • 原文地址:https://www.cnblogs.com/jyzhao/p/15794141.html
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