RMAN 下CROSSCHECK命令详解

CROSSCHECK命令用户核对备份文件,以确保RMAN资料库与备份文件保持同步。当执行该命令时,如果RMAN资料库记录的状态与实际备份文

在用DELETE OBSOLETE 命令删除废弃的备份文件,如果出现如下错误(RMAN-06207 & RMAN-06208),那么需要用CROSSCHECK命令来解决:

RMAN-06207: WARNING: 2 objects could not be deleted for DISK channel(s) due
RMAN-06208: to mismatched status. Use CROSSCHECK command to fix status

CROSSCHECK命令用户核对备份文件,以确保RMAN资料库与备份文件保持同步。当执行该命令时,如果RMAN资料库记录的状态与实际备份文件不匹配,则会更新资料库里的状态使其与实际备份文件状态一致;若备份文件处于expired状态,,那么说明该备份已失效,可以删除之;

常用命令介绍:

1.CROSSCHECK BACKUP

用于核对数据库、表空间、数据文件、控制文件、归档日志、SPFILE的备份集

CROSSCHECK BACKUP ; --核对所有备份(包括有效和失效的备份)

CROSSCHECK BACKUP of database; --核对除控制文件、归档文件外的备份文件

CROSSCHECK BACKUP of tablespace system;

CROSSCHECK BACKUP of datafile 1;

CROSSCHECK BACKUP of controlfile;

CROSSCHECK BACKUP of archivelog all;

CROSSCHECK BACKUP of archivelog sequence 3;

CROSSCHECK BACKUP of spfile;

2.CROSSCHECK BACKUPPIECE

用于 核对特定备份片,该命令需要制定备份片的BP值或备份片名称;

CROSSCHECK BACKUPPIECE 24;

CROSSCHECK BACKUPPIECE '/u01/app/Oracle/rman_backup/OCPYJG_28';

3.CROSSCHECK BACKUPSET

用于核对特定的备份集,该命令需要制定备份集的BP值;

CROSSCHECK BACKUPSET 24;

4.CROSSCHECK COPY

用于核对数据库、表空间、数据文件、控制文件、归档文件的映像副本(即备份是用COPY DATAFILE ...... 或BACKUP AS COPY ......DATAFILE......命令备份数据文件的映像)

CROSSCHECK COPY;

CROSSCHECK COPY of database;

CROSSCHECK COPY of tablespace system;

CROSSCHECK COPY of datafile 1;

CROSSCHECK COPY of controlfile;

CROSSCHECK COPY of archivelog all;

CROSSCHECK COPY of archivelog from sequence 24 until sequence 32;

5.CROSSCHECK DTAFILECOPY

用于核对特定的数据文件映像副本,该命令需要指定映像副本的文件名或KEY值;

CROSSCHECK DATAFILECOPY 2;

CROSSCHECK DATAFILECOPY '/u01/app/oracle/rman_backup/tp9.dbf';

6.CROSSCHECK CONTROLFILECOPY

用于核对特定的控制文件映像副本,该命令需要指定控制文件映像副本的文件名或KEY值;

CROSSCHECK CONTROLFILECOPY 3;

CROSSCHECK CONTROLFILECOPY '/u01/app/oracle/rman_backup/controlfile01.ctl;

7.CROSSCHECK ARCHIVELOG

用于核对特定的归档日志,该命令需要指定归档日志的文件名或KEY值或SEQUENCE值;

CROSSCHECK ARCHIVELOG 36;

CROSSCHECK ARCHIVELOG 'crosscheck archivelog '/u01/app/oracle/product/11g/dbs/arch1_6_813161833.dbf';

CROSSCHECK ARCHIVELOG sequence 7;

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