?数据复制恢复
?启动备库到nomount阶段
SQL> create spfile from pfile;
?File created.
?SQL> startup nomount
?SQL> !ps -ef|grep dmon_test11g
?oracle? 17773? ? 1? 0 11:44 ?? ? ? ? 00:00:00 ora_dmon_test11g
?oracle? 17779 17733? 0 11:44 pts/0? ? 00:00:00 /bin/bash -c ps -ef|grep dmon_test11g
?oracle? 17781 17779? 0 11:44 pts/0? ? 00:00:00 grep dmon_test11g

检查参数是否生效
?备库通过rman复制数据文件
$? rman target sys/xxxx@test11g auxiliary sys/xxxxx@stest11g nocatalog
?Recovery Manager: Release 11.2.0.4.0 - Production on Mon Jul 27 11:46:23 2015
?Copyright (c) 1982, 2011, Oracle and/or its affiliates.? All rights reserved.
?connected to target database: TEST11G (DBID=1038061657)
?using target database control file instead of recovery catalog
?connected to auxiliary database: TEST11G (not mounted)
?RMAN> duplicate target database for standby from active database nofilenamecheck;

配置完成，数据复制工作就告一段落。
?开始配置dg broker

主库执行：
$ dgmgrl /
?DGMGRL for Linux: Version 11.2.0.4.0 - 64bit Production
?Copyright (c) 2000, 2009, Oracle. All rights reserved.
?Welcome to DGMGRL, type "help" for information.
?Connected.
?DGMGRL> create configuration dg_test11g as
?> primary database is test11g
?> connect identifier is test11g;
?Configuration "dg_test11g" created with primary database "test11g"
?DGMGRL> add database stest11g as
?> connect identifier is stest11g
?> maintained as physical;
?Database "stest11g" added
这个时候配置还没有生效
DGMGRL> show configuration;
?Configuration - dg_test11g
? Protection Mode: MaxPerformance
? Databases:
? ? test11g? - Primary database
? ? stest11g - Physical standby database
?Fast-Start Failover: DISABLED
?Configuration Status:
DISABLED
启用配置
DGMGRL> enable? configuration;
然后再次查看，如果配置没有问题，就会生效。
DGMGRL> show configuration;
?Configuration - dg_test11g
? Protection Mode: MaxPerformance
? Databases:
? ? test11g? - Primary database
? ? stest11g - Physical standby database
?Fast-Start Failover: DISABLED
?Configuration Status:
SUCCESS
接着进行再次验证
DGMGRL> enable database test11g;
?Enabled.
?DGMGRL> enable database stest11g;
?Enabled.
?DGMGRL>
?DGMGRL> show configuration;
?Configuration - dg_test11g
? Protection Mode: MaxPerformance
? Databases:
? ? test11g? - Primary database
? ? stest11g - Physical standby database
?Fast-Start Failover: DISABLED
?Configuration Status:
SUCCESS

?dataguard的搭建就完成了，可以在主库切换日志查看是否在备库数据库日志中会应用日志
Media Recovery Waiting for thread 1 sequence 12 (in transit)
Recovery of Online Redo Log: Thread 1 Group 4 Seq 12 Reading mem 0
? Mem# 0: /DATA/app/oracle/oradata/test11g/redo04.log

?11g备库使用active dataguard特性。
SQL> alter database open;
?Database altered.

?SQL>? recover managed standby database using current logfile disconnect from session;
?Media recovery complete.