利用RMAN搭建DATAGARD进行主备切换

文章由LinuxBoy分享于2019-03-30 04:03:12热评（491）

利用RMAN搭建DATAGARD进行主备切换

使用rman的duplicate来创建备库，过程简洁了不少，无需在手动创建备库控制文件。

主库SPFILE

*.log_archive_format='%T%S%r.ARC'
*.DB_UNIQUE_NAME='primary'
*.log_archive_config='DG_CONFIG=(primary,standby)'
*.log_archive_dest_1='location=C:/Oracle/product/10.2.0/oradata/arch VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=primary'
*.log_archive_dest_2='SERVICE=standby arch ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=standby'
*.STANDBY_FILE_MANAGEMENT=AUTO
*.LOG_ARCHIVE_DEST_STATE_1=ENABLE
*.LOG_ARCHIVE_DEST_STATE_2=ENABLE

*.FAL_SERVER='standby'

*.FAL_CLIENT='primary'

备库SPFILE 在主库创建SPFILE给备库并修改

*.log_archive_format='%T%S%r.ARC'
*.DB_UNIQUE_NAME='standby'
*.log_archive_config='DG_CONFIG=(primary,standby)'
*.log_archive_dest_1='location=C:/oracle/product/10.2.0/oradata/arch VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=standby'
*.log_archive_dest_2='SERVICE=primary arch ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=primary'
*.STANDBY_FILE_MANAGEMENT=AUTO
*.LOG_ARCHIVE_DEST_STATE_1=ENABLE
*.LOG_ARCHIVE_DEST_STATE_2=ENABLE
*.FAL_SERVER='primary'
*.FAL_CLIENT='standby'

配置好TNS 监听能互相TNSPING通

主库操作

修改LOGFILE大小为100M，添加4组备用联机日志

SQL> alter database add logfile group 4 'c:\oracle\product\10.2.0\oradata\orcl\r
edolog04.log' size 50M;

SQL> alter database add logfile group 5 'c:\oracle\product\10.2.0\oradata\orcl\r
edolog05.log' size 50M;

SQL> alter system switch logfile;

SQL> alter database drop logfile group 1;

SQL> alter database drop logfile group 2;

SQL> alter database drop logfile group 3;

SQL> alter database add logfile group 2 'c:\oracle\product\10.2.0\oradata\orcl\r
edolog02.log' size 100M;

SQL> alter database add logfile group 3 'c:\oracle\product\10.2.0\oradata\orcl\r
edolog03.log' size 100M;

SQL> alter database drop logfile group 4;

SQL> select group#,sequence#,status from v$log;

GROUP# SEQUENCE# STATUS
---------- ---------- --------------------------------
1 15 CURRENT
2 0 UNUSED
3 0 UNUSED
5 14 ACTIVE

SQL> alter system switch logfile;

SQL> select group#,sequence#,status from v$log;

GROUP# SEQUENCE# STATUS
---------- ---------- --------------------------------
1 19 INACTIVE
2 20 ACTIVE
3 21 CURRENT
5 18 INACTIVE

SQL> alter database drop logfile group 5;

数据库已更改。

SQL> select group#,sequence#,status from v$log;

GROUP# SEQUENCE# STATUS
---------- ---------- --------------------------------
1 19 INACTIVE
2 20 ACTIVE
3 21 CURRENT

SQL> alter database add standby logfile group 4 'c:\oracle\product\10.2.0\oradat
a\orcl\standbylog04.log' size 50M;

数据库已更改。

SQL> alter database add standby logfile group 5 'c:\oracle\product\10.2.0\oradat
a\orcl\standbylog05.log' size 50M;

数据库已更改。

SQL> alter database add standby logfile group 6 'c:\oracle\product\10.2.0\oradat
a\orcl\standbylog06.log' size 50M;

数据库已更改。

SQL> alter database add standby logfile group 7 'c:\oracle\product\10.2.0\oradat
a\orcl\standbylog07.log' size 50M;

数据库已更改。

-- 添加日志组成员方法
SQL> alter database add logfile member 'c:\oracle\product\10.2.0\oradata\orcl\re
dolog012.log' to group 1;

数据库已更改。

--删除日志组成员方法

SQL> alter database drop logfile member 'c:\oracle\product\10.2.0\oradata\orcl\
redolog012.log';

数据库已更改。

RMAN全备数据库控制文件归档日志

RMAN> backup full format 'c:\backup\fullbackup_%d_%T_%s.bak' database include cu

rrent controlfile for standby;

RMAN> sql 'alter system archive log current';

sql 语句: alter system archive log current
RMAN> backup archivelog all format 'c:\backup\archive_%d_%T_%s';

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利用RMAN搭建DATAGARD进行主备切换