oracle 11.2.0.1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_logstdby.build;

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_name,open_mode, database_role,switchover_status,guard_status,protection_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=5 ignorecase=y force=y

备库上 修改参数

alter system set log_archive_dest_1='location=/u01/oradata/arch/stby valid_for=(online_logfiles,all_roles) db_unique_name=stby';

alter system set log_archive_dest_2='location=/u01/oradata/arch valid_for=(standby_logfiles,standby_roles) db_unique_name=stby';

备库上 创建备用日志

alter database add standby logfile group 4 ('/u01/oradata/stby/standbylj01.log') size 20M reuse;

alter database add standby logfile group 5 ('/u01/oradata/stby/standbylj02.log') size 20M reuse;

alter database add standby logfile group 6 ('/u01/oradata/stby/standbylj03.log') size 20M 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_name,status from v$instance;

SELECT db_unique_name,open_mode, database_role,switchover_status,guard_status,protection_mode FROM V$DATABASE;

select group#,sequence#,used,status from v$standby_log;

测试

在主库上 创建

create table scott.t4 (id int);

insert into scott.t4 values(4);

commit;

alter system switch logfile;

过一会儿 在逻辑备用库上查询

select * from scott.t4;