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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原文出处:
http://www.eygle.com/ha/Use.Rman.Plus.Archivelog.Option.htm