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
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