Question

我们刚刚使用数据泵切换到使用RMAN的增量备份。我一直遇到增量备份的问题。以下是我的备份脚本：

BACKUP device type disk incremental level=1 tag='T4PRO' section size 1g database plus archivelog;
backup current controlfile format='&1CONTROLFILE_%T.BKP';

和恢复：

RECOVER COPY OF DATABASE WITH TAG 'T4PRO' UNTIL TIME 'SYSDATE-3';
DELETE NOPROMPT OBSOLETE DEVICE TYPE DISK;

备份成功完成，虽然备份副本的大小似乎比我预期的要大，但这是讨论的一小部分。我真正的问题是我们在第5天并且在运行recover命令时仍然会这样：

RMAN> RECOVER COPY OF DATABASE WITH TAG 'T4PRO' UNTIL TIME 'SYSDATE-3';
Starting recover at 17-JAN-18
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=133 device type=DISK
no copy of datafile 1 found to recover
no copy of datafile 2 found to recover
no copy of datafile 3 found to recover
no copy of datafile 4 found to recover
no copy of datafile 5 found to recover
Finished recover at 17-JAN-18

RMAN> DELETE NOPROMPT OBSOLETE DEVICE TYPE DISK;
RMAN retention policy will be applied to the command
RMAN retention policy is set to recovery window of 7 days
released channel: ORA_DISK_1
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=133 device type=DISK
no obsolete backups found

正如我两天前所预期的那样，备用件不会向前推进。以下是SHOW ALL命令的结果，如果它提供任何其他信息：

RMAN> show all;
RMAN configuration parameters for database with db_unique_name T4PRO are:
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;
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 'C:\APP\ITWORKS\PRODUCT\11.2.0\DBHOME_1\D
ATABASE\SNCFT4PRO.ORA'; # default

Answer 1

检查数据文件副本是否存在：

RMAN> LIST COPY OF DATABASE;

检查TAG“T4PRO”是否存在数据文件副本：

RMAN> LIST COPY OF DATABASE TAG 'T4PRO';

您必须先使用BACKUP AS COPY...进行“映像”备份，然后才能使用增量备份恢复该映像。

增量RMAN备份不向前滚动

1 个答案: