打算写一系列的文章介绍11g的新特性和变化。

Oracle11g在备份和恢复方面新增了很多的功能，无论是性能、功能性、安全性和可操作性方面都有了不同程度的提高。

这一篇介绍DATA GUARD集成性方面的提高。

Oracle11新特性——备份恢复功能增强（一）：http://yangtingkun.itpub.net/post/468/412991

Oracle11新特性——备份恢复功能增强（二）：http://yangtingkun.itpub.net/post/468/414647

Oracle11新特性——备份恢复功能增强（三）：http://yangtingkun.itpub.net/post/468/414834

Oracle11新特性——备份恢复功能增强（四）：http://yangtingkun.itpub.net/post/468/414941

Oracle11新特性——备份恢复功能增强（五）：http://yangtingkun.itpub.net/post/468/416015

Oracle11新特性——备份恢复功能增强（六）：http://yangtingkun.itpub.net/post/468/423531

Oracle11新特性——备份恢复功能增强（七）：http://yangtingkun.itpub.net/post/468/426943

由于物理STANDBY相当于PRIMARY数据库的备份，因此物理STANDBY和PRIMARY数据库可以共用一套备份。

在11g中，为了实现DATA GUARD环境中备份的通用性，rman在DATA GUARD环境集成方面有了很大的提高。

首先rman可以为DATA GUARD环境中的各个数据库设置不同的配置。这个功能需要在CATALOG模式下实现，首先两边登陆RMAN并连接CATALOG注册数据库信息：

[oracle@yangtk ~]$ rman target / catalog catalog_11g/CATALOG_11G

Recovery Manager: Release 11.1.0.6.0 - Production on Thu Nov 8 10:52:33 2007

Copyright (c) 1982, 2007, Oracle. All rights reserved.

connected to target database: ORA11G (DBID=4026820313)
connected to recovery catalog database

RMAN> backup spfile;

Starting backup at 08-NOV-07
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=133 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
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channel ORA_DISK_1: specifying datafile(s) in backup set
including current SPFILE in backup set
channel ORA_DISK_1: starting piece 1 at 08-NOV-07
channel ORA_DISK_1: finished piece 1 at 08-NOV-07
piece handle=/data1/backup/1ej0hbk3_1_1 tag=TAG20071108T105250 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 08-NOV-07

RMAN> exit

Recovery Manager complete.

登陆standby数据库，同样执行备份，来注册数据库信息：

[oracle@yangtk2 ~]$ rman target / catalog catalog_11g/CATALOG_11G@ora11g_p

Recovery Manager: Release 11.1.0.6.0 - Production on Fri Nov 30 23:00:36 2007

Copyright (c) 1982, 2007, Oracle. All rights reserved.

connected to target database: ORA11G (DBID=4026820313)
connected to recovery catalog database

RMAN> backup spfile;

Starting backup at 30-NOV-07
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=145 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current SPFILE in backup set
channel ORA_DISK_1: starting piece 1 at 30-NOV-07
channel ORA_DISK_1: finished piece 1 at 30-NOV-07
piece handle=/data1/backup/18j2cmgt_1_1 tag=TAG20071130T230045 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 30-NOV-07

RMAN> exit

Recovery Manager complete.

下面可以为不同db_unique_name设置不同的参数：

[oracle@yangtk ~]$ rman target / catalog catalog_11g/CATALOG_11G

Recovery Manager: Release 11.1.0.6.0 - Production on Thu Nov 8 10:44:35 2007