10g 11g配置Logical Standby

1.创建一个物理Standby数据库

详细见11g Physical
Standby配置

2.Standby数据库取消managed  recovery

ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;

3.主库配置

1）主库修改LOG_ARCHIVE_DEST_2参数

ALTER SYSTEM SET log_archive_dest_2 = ‘SERVICE=PRODDG VALID_FOR=(ONLINE_LOGFILES,STANDBY_ROLE) DB_UNIQUE_NAME=PRODDG‘  SCOPE=SPFILE;

2）主库建立Logminer数据字典

EXECUTE DBMS_LOGSTDBY.BUILD;

4.备库设置

1）切换到逻辑备库

ALTER DATABASE RECOVER TO LOGICAL STANDBY PRODDG;

2）重启实例，并且reset log

SHUTDOWN IMMEDIATE

   STARTUP  mount

   ALTER DATABASE OPEN RESETLOGS;

3）standby开启sql apply

ALTER DATABASE START LOGICAL STANDBY APPLY;

5.验证

1）主库创建一个用户

SQL> alter system switch logfile;

System altered.
SQL> create user hxy identified by hxy;
User created.
SQL> grant dba to hxy;
Grant succeeded.
SQL> alter system switch logfile;
System altered.
SQL> conn hxy/hxy

Connected.

SQL> select * from tab;
no rows selected
SQL> create table t1 as select * from dba_users;
Table created.
SQL> alter system switch logfile;
System altered.
SQL> select count(*) from t1;
COUNT(*)

----------

        23

2）备库查看alert日志

Sun Apr 27 23:25:11 2014

LOGMINER: Begin mining logfile for session 1 thread 1 sequence 123, /dsg/oracle11/PRODDG/arch/log1_123_839354331.arc

LOGMINER: End   mining logfile for session 1 thread 1 sequence 123, /dsg/oracle11/PRODDG/arch/log1_123_839354331.arc

Sun Apr 27 23:25:12 2014

RFS[2]: Opened log for thread 1 sequence 124 dbid 251192667 branch 839354331

Sun Apr 27 23:26:19 2014

RFS LogMiner: Registered logfile [/dsg/oracle11/PRODDG/arch/log1_124_839354331.arc] to LogMiner session id [1]

Sun Apr 27 23:26:19 2014

LOGMINER: Begin mining logfile for session 1 thread 1 sequence 124, /dsg/oracle11/PRODDG/arch/log1_124_839354331.arc

LOGMINER: End   mining logfile for session 1 thread 1 sequence 124, /dsg/oracle11/PRODDG/arch/log1_124_839354331.arc

RFS[2]: Opened log for thread 1 sequence 125 dbid 251192667 branch 839354331

数据库中验证

SQL> conn hxy/hxy

Connected.

SQL> select * from tab;

TNAME                          TABTYPE  CLUSTERID

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

T1                             TABLE

SQL> select count(*) from t1;

  COUNT(*)

----------

        23

可见，主库备库数据一致！

6.总结

配置Logical DataGuard最主要的还是配置好Physical
DataGuard，并且主备库最好使用spfile启动数据库，方便切换成Logical Standby的时候修改参数

如果数据库是RAC，配置请参考官方文档Data Guard Concepts and
Administration 11g Release 2 (11.2)之 Creating a Logical Standby
Database

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