oracle11gswitchover

来源：动视网责编：小采时间：2020-11-09 13:08:53

oracle11gswitchover

oracle11gswitchover:oracle dataguard搭建请看如下链接 http://www.itopers.com/p=679 switchover主要是在数据库升级，硬件升级等进行。如下将如何进行switchover：在prmary将数据库设置为standby SQL alter database commit to switch

推荐度：

点击下载本文 文档为doc格式

导读oracle11gswitchover:oracle dataguard搭建请看如下链接 http://www.itopers.com/p=679 switchover主要是在数据库升级，硬件升级等进行。如下将如何进行switchover：在prmary将数据库设置为standby SQL alter database commit to switch

oracle dataguard搭建请看如下链接 http://www.itopers.com/?p=679 switchover主要是在数据库升级，硬件升级等进行。如下将如何进行switchover：在prmary将数据库设置为standby SQL alter database commit to switchover to physical standby;Database alte

oracle dataguard搭建请看如下链接

http://www.itopers.com/?p=679

switchover主要是在数据库升级，硬件升级等进行。如下将如何进行switchover：

在prmary将数据库设置为standby

SQL> alter database commit to switchover to physical standby;
Database altered.

11g时，执行这个命令后，数据库已经关闭了，不需要手动进行关闭了

SQL> select db_unique_name,database_role,open_mode,switchover_status from v$database;
select db_unique_name,database_role,open_mode,switchover_status from v$database
*
ERROR at line 1:
ORA-01034: ORACLE not available
Process ID: 2650
Session ID: 458 Serial number: 211

然后启动启动到mount状态查看：

SQL> startup mount
ORACLE instance started.
Total System Global Area 1.3462E+10 bytes
Fixed Size 2265984 bytes
Variable Size 33211968 bytes
Database Buffers 1.0133E+10 bytes
Redo Buffers 4460544 bytes
Database mounted.
SQL> select db_unique_name,database_role,open_mode,switchover_status from v$database;
DB_UNIQUE_NAME DATABASE_ROLE OPEN_MODE
------------------------------ ---------------- --------------------
SWITCHOVER_STATUS
--------------------
actvdb01 PHYSICAL STANDBY MOUNTED
RECOVERY NEEDED

查看已经是PHYSICAL STANDBY状态了。

打开数据库，这个时候应该是read only状态：

SQL> alter database open;
Database altered.
SQL> select db_unique_name,database_role,open_mode,switchover_status from v$database;
DB_UNIQUE_NAME DATABASE_ROLE OPEN_MODE
------------------------------ ---------------- --------------------
SWITCHOVER_STATUS
--------------------
actvdb01 PHYSICAL STANDBY READ ONLY
RECOVERY NEEDED

这个时候primary已经变成了standby了。

然后连接到之前的standby服务器上：

先查看状态，确定日志应用是否完整

SQL> select db_unique_name,database_role,open_mode from v$database;
DB_UNIQUE_NAME DATABASE_ROLE OPEN_MODE
------------------------------ ---------------- --------------------
actvdb02 PHYSICAL STANDBY READ ONLY WITH APPLY
SQL> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 348
Next log sequence to archive 0
Current log sequence 353
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> select db_unique_name,database_role,open_mode from v$database;
DB_UNIQUE_NAME DATABASE_ROLE OPEN_MODE
------------------------------ ---------------- --------------------
actvdb02 PHYSICAL STANDBY READ ONLY

然后将standby切换成primary

SQL> alter database commit to switchover to primary;
Database altered.
SQL> select db_unique_name,database_role,open_mode from v$database;
DB_UNIQUE_NAME DATABASE_ROLE OPEN_MODE
------------------------------ ---------------- --------------------
actvdb02 PRIMARY MOUNTED

完成后，状态已经变成的primary了，注意，在执行切换过程中，不能有任何session连接，如果有会有如下报错：

SQL> alter database commit to switchover to primary;
alter database commit to switchover to primary
*
ERROR at line 1:
ORA-01093: ALTER DATABASE CLOSE only permitted with no sessions connected

把session关闭掉，重新执行即可。

然后打开数据库,在新primary中（也就是老的standby）

SQL> alter database open;
Database altered.
SQL> select db_unique_name,database_role,open_mode from v$database;
DB_UNIQUE_NAME DATABASE_ROLE OPEN_MODE
------------------------------ ---------------- --------------------
actvdb02 PRIMARY READ WRITE
SQL> select db_unique_name,database_role,open_mode,switchover_status from v$database;
DB_UNIQUE_NAME DATABASE_ROLE OPEN_MODE
------------------------------ ---------------- --------------------
SWITCHOVER_STATUS
--------------------
actvdb02 PRIMARY READ WRITE
TO STANDBY

查看状态已经变成了primary,且为read write了。表示已经成功从standby转成primary了

然后再登录到standby中（之前的primary中）启用mrp进程

SQL> alter database recover managed standby database using current logfile disconnect from session;
Database altered.
SQL> select db_unique_name,database_role,open_mode,switchover_status from v$database;
DB_UNIQUE_NAME DATABASE_ROLE OPEN_MODE
------------------------------ ---------------- --------------------
SWITCHOVER_STATUS
--------------------
actvdb01 PHYSICAL STANDBY READ ONLY WITH APPLY
NOT ALLOWED

再查看进程已经是应用日志状态了。

到新的primary中将创建表测试是否能正常应用日志：

SQL> create table test.t11 (id number)tablespace test;
Table created.

到standby中查看已经能正常传输、应用日志了：

SQL> select owner,table_name from dba_tables where owner='TEST';
OWNER TABLE_NAME
------------------------------ ------------------------------
TEST T2
TEST TEST_TABLE
TEST TEST01
TEST TEST02
TEST TEST03
TEST T4
TEST T5
TEST T7
TEST T6
TEST T8
TEST T11
OWNER TABLE_NAME
------------------------------ ------------------------------
TEST T9
12 rows selected.

只要前面的配置没有问题，switchover是很简单的，特别注意以下几点：

*.local_listener 这个配置是的自己的tnsname名字

*.fal_client=’actvdb’??? 这个配置的是自己的tnsname,不管是primary，还是standby
*.fal_server=’actvdbbak’?? 这个配置的是对方的tnsname,不管是primary，还是standby

原文地址：oracle 11g switchover, 感谢原作者分享。