Oracle数据库备份与恢复 - RMAN配置参数

在RMAN中有一系列的默认配置，这些配置决定了备份和恢复时各个方面的选项你可以使用

SHOW和

CONFIGURE来查看修改RMAN的配置参数。

SHOW ALL命令查看所有的RMAN配置

RMAN> SHOW ALL;using target database control file instead of recovery catalogRMAN configuration parameters for database with db_unique_name PTIAN are:CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # defaultCONFIGURE BACKUP OPTIMIZATION OFF; # defaultCONFIGURE DEFAULT DEVICE TYPE TO DISK; # defaultCONFIGURE CONTROLFILE AUTOBACKUP OFF; # defaultCONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # defaultCONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # defaultCONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # defaultCONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # defaultCONFIGURE MAXSETSIZE TO UNLIMITED; # defaultCONFIGURE ENCRYPTION FOR DATABASE OFF; # defaultCONFIGURE ENCRYPTION ALGORITHM 'AES128'; # defaultCONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # defaultCONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # defaultCONFIGURE SNAPSHOT CONTROLFILE NAME TO 'E:\APP\TIANPAN\PRODUCT\11.2.0\DBHOME_1\DATABASE\SNCFPTIAN.ORA'; # defaultRMAN>

配置项后面加了# default的表示该项为初始配置，未被修改过。SHOW出来的输出保存后，以后可以直接执行，这样就其实就可以重新恢复配置。SHOW ...命令查看特定的RMAN配置

RMAN> SHOW RETENTION POLICY;using target database control file instead of recovery catalogRMAN configuration parameters for database with db_unique_name PTIAN are:CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # defaultRMAN> SHOW DEFAULT DEVICE TYPE;RMAN configuration parameters for database with db_unique_name PTIAN are:CONFIGURE DEFAULT DEVICE TYPE TO DISK; # defaultRMAN>

CONFIGURE ... CLEAR恢复RMAN默认配置你还可以使用CONFIGURE ... CLEAR命令把RMAN配置恢复成默认配置。

RMAN> CONFIGURE BACKUP OPTIMIZATION ON;new RMAN configuration parameters:CONFIGURE BACKUP OPTIMIZATION ON;new RMAN configuration parameters are successfully storedRMAN> CONFIGURE BACKUP OPTIMIZATION CLEAR;old RMAN configuration parameters:CONFIGURE BACKUP OPTIMIZATION ON;RMAN configuration parameters are successfully reset to default valueRMAN> show BACKUP OPTIMIZATION;RMAN configuration parameters for database with db_unique_name PTIAN are:CONFIGURE BACKUP OPTIMIZATION OFF; # defaultRMAN>

具体的各个RMAN配置参数的意思可以参考Oracle官方文档的说明：Configuring the RMAN Environment