準備：

確認對象和語句能被standby支持

確保primary庫中各表的行可被唯一標識

環境：

操作系統：RED HAT LINUX ENTERPRISE 5

ORACLE: 11.2.0.1.0

PRIMARY:

IP: 192.168.1.11

SID: test

DB_UNIQUE_NAME:test

安裝路徑：/oracle/oracle/product/11.2.0/dbhome_1

本地歸檔路徑：/oracle/oradata/test/archive

PHYSICS STANDBY：

IP: 192.168.1.12

SID: dgtest

DB_UNIQUE_NAME:dgtest

安裝路徑：/oracle/oracle/product/11.2.0/dbhome_1

本地歸檔路徑：/oracle/oradata/dgtest/dgtest/archive

LOGICAL STANDBY:

IP: 192.168.1.15

SID: logicdg

DB_UNIQUE_NAME: logicdg

安裝路徑：/oracle/oracle/product/11.2.0/dbhome_1

本地歸檔路徑：/oracle/oradata/logicdg/local-archive

本例測試采用物理standby轉邏輯standby的方式在一個已經存在的dataguard環境中新增一臺邏輯standby.

原dataguard環境可參考：

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

創建新物理standby的過程亦可參照此文。此處不再贅述。

則目前環境為：

primary：192.168.1.11

physics： 192.168.1.12

logical： 192.168.1.15 (目前為物理standby.待轉換)

1.修改primary初始化參數文件(僅列出修改部分)

*.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.查看兩臺物理standby同步狀態

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.取消待轉換物理standby的redo應用

logical> alter database recover managed standby database cancel;

Database altered.

4.primary生成數據字典

primary> execute dbms_logstdby.build;

PL/SQL procedure successfully completed.

5.將物理standby轉換為邏輯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.調整standby初始化參數

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方式打開數據庫

logical> alter database open resetlogs;

Database altered.

8.應用redo

創建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.

啟動redo實時應用

logical> alter database start logical standby apply immediate;

Database altered.

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