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准备：

确认对象和语句能被standby支持

确保primary库中各表的行可被唯一标识

环境：

操作系统：RED HAT LINUX ENTERPRISE 5

ORACLE: 11.2.0.1.0

PRIMARY:

IP: 192.168.1.11

SID: test

DB_UNIQUE_NAME:test

安装路径：/oracle/oracle/product/11.2.0/dbhome_1

本地归档路径：/oracle/oradata/test/archive

PHYSICS STANDBY：

IP: 192.168.1.12

SID: dgtest

DB_UNIQUE_NAME:dgtest

安装路径：/oracle/oracle/product/11.2.0/dbhome_1

本地归档路径：/oracle/oradata/dgtest/dgtest/archive

LOGICAL STANDBY:

IP: 192.168.1.15

SID: logicdg

DB_UNIQUE_NAME: logicdg

安装路径：/oracle/oracle/product/11.2.0/dbhome_1

本地归档路径：/oracle/oradata/logicdg/local-archive

本例测试采用物理standby转逻辑standby的方式在一个已经存在的dataguard环境中新增一台逻辑standby.

原dataguard环境可参考：

http://xin23.blog.51cto.com/1827266/504066

创建新物理standby的过程亦可参照此文。此处不再赘述。

则目前环境为：

primary：192.168.1.11

physics： 192.168.1.12

logical： 192.168.1.15 (目前为物理standby.待转换)

1.修改primary初始化参数文件(仅列出修改部分)

*.log_archive_dest_state_2=defer

*.log_archive_dest_state_3=defer

*.log_archive_config='dg_config=(test,dgtest,logicdg)'

*.log_archive_dest_2='service=test12 arch valid_for=(online_logfiles,primary_role) db_unique_name=dgtest'

*.log_archive_dest_3='service=test15 arch valid_for=(online_logfiles,primary_role) db_unique_name=logicdg'

*.fal_server=test11

*.fal_client=test12

*.standby_file_management=auto

*.db_file_name_convert='/oracle/oradata/test','/oracle/oradata/dgtest/dgtest','/oracle/oradata/test','/

oracle/oradata/logicdg'

*.log_file_name_convert='/oracle/oradata/test','/oracle/oradata/dgtest/dgtest','/oracle/oradata/test','/

oracle/oradata/logicdg'

2.查看两台物理standby同步状态

physics> select sequence#,applied from v$archived_log;

SEQUENCE# APPLIED

---------- ---------

66 YES

67 YES

68 YES

69 YES

70 YES

71 YES

72 YES

7 rows selected.

-----------------------------------------------------------------------------

logical> select sequence#,applied from v$archived_log;

SEQUENCE# APPLIED

---------- ---------

67 YES

68 YES

69 YES

70 YES

71 YES

72 YES

6 rows selected.

3.取消待转换物理standby的redo应用

logical> alter database recover managed standby database cancel;

Database altered.

4.primary生成数据字典

primary> execute dbms_logstdby.build;

PL/SQL procedure successfully completed.

5.将物理standby转换为逻辑standby

logical> alter database recover to logical standby logicdg;

Database altered.

logical> shutdown immediate

ORA-01507: database not mounted

ORACLE instance shut down.

logical> startup mount

ORACLE instance started.

Total System Global Area 2488635392 bytes

Fixed Size 2215904 bytes

Variable Size 1392508960 bytes

Database Buffers 1090519040 bytes

Redo Buffers 3391488 bytes

Database mounted.

6.调整standby初始化参数

logical> alter system set log_archive_dest_1='location=/oracle/oradata/logicdg/local-archive valid_for=(online_logfiles,all_roles)

2 db_unique_name=logicdg';

System altered.

logical> alter system set log_archive_dest_5='location=/oracle/oradata/logicdg/archive valid_for=(standby_logfiles,standby_role)

2 db_unique_name=logicdg';

System altered.

7.resetlogs方式打开数据库

logical> alter database open resetlogs;

Database altered.

8.应用redo

创建standby redologs

logical> alter database add standby logfile group 11 '/oracle/oradata/logicdg/standbyredo11.log' size 100m;

Database altered.

logical> alter database add standby logfile group 12 '/oracle/oradata/logicdg/standbyredo12.log' size 100m;

Database altered.

logical> alter database add standby logfile group 13 '/oracle/oradata/logicdg/standbyredo13.log' size 100m;

Database altered.

启动redo实时应用

logical> alter database start logical standby apply immediate;

Database altered.

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