oracle 11gR2 逻辑备用数据库搭建

oracle 逻辑备用库环境搭建

首先创建物理备用库创建物理备用库后最好创建各自的spfile

物理备库上 停止redo应用

alter database recover managed STANDBY database cancel;

主库上生成logminer 会发生几次切换日志 报错忽略

execute dbms_logstdbybuild;

物理备库上 转化为逻辑备用库

alter database recover to logical standby orcl; < db_name 参数

shutdown immediate

startup mount

SELECT db_unique_nameopen_mode database_roleswitchover_statusguard_statusprotection_mode FROM V$DATABASE;

备库上 重建逻辑standby的密码文件

orapwd file=$ORACLE_HOME/dbs/orapwstby password=oracle entries= ignorecase=y force=y

备库上 修改参数

alter system set log_archive_dest_=location=/u/oradata/arch/stby valid_for=(online_logfilesall_roles) db_unique_name=stby;

alter system set log_archive_dest_=location=/u/oradata/arch valid_for=(standby_logfilesstandby_roles) db_unique_name=stby;

备库上 创建备用日志

alter database add standby logfile group (/u/oradata/stby/standbyljlog) size M reuse;

alter database add standby logfile group (/u/oradata/stby/standbyljlog) size M reuse;

alter database add standby logfile group (/u/oradata/stby/standbyljlog) size M reuse;

select member from v$logfile;

备库上 打开逻辑standby

alter database open resetlogs;

alter database start logical standby apply immediate;

备库上 检查

select instance_namestatus from v$instance;

SELECT db_unique_nameopen_mode database_roleswitchover_statusguard_statusprotection_mode FROM V$DATABASE;

select group#sequence#usedstatus from v$standby_log;

测试

在主库上 创建

create table scottt (id int);

insert into scottt values();

commit;

alter system switch logfile;

过一会儿 在逻辑备用库上查询

select * from scottt;