Oracle9i开始Rman提供plus archivelog选项，极大的简化了Rman备份的操作。
当你定义plus archivelog语句时，RMAN执行如下步骤的操作：
1。运行一个ALTER SYSTEM ARCHIVELOG CURRENT命令
2。运行BACKUP ARCHIVELOG ALL命令。注意如果备份优化被启用，RMAN只会备份未备份过的日志
3。备份BACKUP命令中定义的文件
4。运行ALTER SYSTEM ARCHIVELOG CURRENT命令
5。备份所有的剩下的归档日志
测试备份脚本：
backup database format '/opt/oracle/orabak/full_%d_%T_%s' plus archivelog format '/opt/oracle/orabak/arch_%d_%T_%s' delete all input;
测试日志:
[oracle@jumper oracle]$ rman target / Recovery Manager: Release 9.2.0.4.0 - Production Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved. connected to target database: CONNER (DBID=3152029224) RMAN> run { 2> backup database 3> format '/opt/oracle/orabak/full%d_%T_%s' 4> plus archivelog 5> format '/opt/oracle/orabak/arch_%d_%T_%s' 6> delete all input; } Starting backup at 04-NOV-04 current log archived using target database controlfile instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: sid=12 devtype=DISK channel ORA_DISK_1: starting archive log backupset channel ORA_DISK_1: specifying archive log(s) in backup set input archive log thread=1 sequence=163 recid=6 stamp=541351580 channel ORA_DISK_1: starting piece 1 at 04-NOV-04 channel ORA_DISK_1: finished piece 1 at 04-NOV-04 piece handle=/opt/oracle/orabak/arch_CONNER_20041104_7 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:02 channel ORA_DISK_1: deleting archive log(s) archive log filename=/opt/oracle/oradata/conner/archive/1_163.dbf recid=6 stamp=541351580 Finished backup at 04-NOV-04 Starting backup at 04-NOV-04 using channel ORA_DISK_1 channel ORA_DISK_1: starting full datafile backupset channel ORA_DISK_1: specifying datafile(s) in backupset including current SPFILE in backupset including current controlfile in backupset input datafile fno=00004 name=/opt/oracle/oradata/conner/eygle01.dbf input datafile fno=00001 name=/opt/oracle/oradata/conner/system01.dbf input datafile fno=00002 name=/opt/oracle/oradata/conner/undotbs01.dbf input datafile fno=00003 name=/opt/oracle/oradata/conner/users01.dbf channel ORA_DISK_1: starting piece 1 at 04-NOV-04 aaaachannel ORA_DISK_1: finished piece 1 at 04-NOV-04 piece handle=/opt/oracle/orabak/full_CONNER_20041104_8 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:04:04 Finished backup at 04-NOV-04 Starting backup at 04-NOV-04 current log archived using channel ORA_DISK_1 channel ORA_DISK_1: starting archive log backupset channel ORA_DISK_1: specifying archive log(s) in backup set input archive log thread=1 sequence=164 recid=7 stamp=541351832 channel ORA_DISK_1: starting piece 1 at 04-NOV-04 channel ORA_DISK_1: finished piece 1 at 04-NOV-04 piece handle=/opt/oracle/orabak/arch_CONNER_20041104_9 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:02 channel ORA_DISK_1: deleting archive log(s) archive log filename=/opt/oracle/oradata/conner/archive/1_164.dbf recid=7 stamp=541351832 Finished backup at 04-NOV-04 RMAN>
通过plus archivelog,简化了备份操作，同时确保需要的日志都被备份。
[oracle@jumper orabak]$ ls -l total 751628 -rw-r----- 1 oracle dba 156160 Nov 4 15:26 arch_CONNER_20041104_7 -rw-r----- 1 oracle dba 60928 Nov 4 15:30 arch_CONNER_20041104_9 -rw-r----- 1 oracle dba 768679936 Nov 4 15:30 full_CONNER_20041104_8
本文作者:
eygle,Oracle技术关注者,来自中国最大的Oracle技术论坛itpub.
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