探索 Oracle 10g RAC 数据库环境

RAC安装参考点击打开链接

rac1上执行

rac1-> sqlplus sys/test1234@devdb1 as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Sun Jul 20 17:04:01 2014

Copyright (c) 1982, 2007, Oracle. All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production

With the Partitioning, Real Application Clusters, OLAP, Data Mining

and Real Application Testing options

SQL> show parameter service

NAME TYPE VALUE

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

service_names string CRM, devdb

rac2上执行

rac2-> sqlplus sys/test1234@devdb2 as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Sun Jul 20 17:04:59 2014

Copyright (c) 1982, 2007, Oracle. All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production

With the Partitioning, Real Application Clusters, OLAP, Data Mining

and Real Application Testing options

SQL> show parameter service;

NAME TYPE VALUE

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

service_names string devdb

在rac1上用CRM服务连接：

rac1-> sqlplus sys/test1234@crm as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Sun Jul 20 17:08:15 2014

Copyright (c) 1982, 2007, Oracle. All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production

With the Partitioning, Real Application Clusters, OLAP, Data Mining

and Real Application Testing options

SQL> select instance_number instance#,instance_name,host_name,status from v$instance;

INSTANCE# INSTANCE_NAME

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

HOST_NAME STATUS

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

1 devdb1

rac1 OPEN

SQL> select failover_type,failover_method,failed_over from v$session where username='SYS';

FAILOVER_TYPE FAILOVER_M FAI

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

SELECT BASIC NO

NONE NONE NO

NONE NONE NO

NONE NONE NO

NONE NONE NO

NONE NONE NO

6 rows selected.

新打开一个putty，从其他会话中关闭该实例。在CRM所在的实例上以 sys 用户身份连接，并关闭该实例。

rac1-> export ORACLE_SID=devdb1

rac1-> sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Sun Jul 20 17:19:20 2014

Copyright (c) 1982, 2007, Oracle. All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production

With the Partitioning, Real Application Clusters, OLAP, Data Mining

and Real Application Testing options

SQL> select instance_number instance#,instance_name,host_name,status from v$instance;

INSTANCE# INSTANCE_NAME

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

HOST_NAME STATUS

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

1 devdb1

rac1 OPEN

SQL> shutdown abort;

ORACLE instance shut down.

验证会话已经完成故障切换:从先前打开的CRM 会话执行以下查询，以验证该会话已经故障切换到其他实例。

SQL> select instance_number instance#,instance_name,host_name,status from v$instance;

INSTANCE# INSTANCE_NAME

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

HOST_NAME STATUS

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

2 devdb2

rac2 OPEN

SQL> select failover_type,failover_method,failed_over from v$session where username='SYS';

FAILOVER_TYPE FAILOVER_M FAI

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

NONE NONE NO

SELECT BASIC YES

NONE NONE NO

NONE NONE NO

NONE NONE NO

NONE NONE NO

6 rows selected.

将 CRM 服务重新定位到首选实例。恢复 devdb1 之后，CRM 服务不会自动重新定位到首选实例。您必须手动将服务重新定位到 devdb1。

rac1-> export ORACLE_SID=devdb1

rac1-> sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Sun Jul 20 17:24:54 2014

Copyright (c) 1982, 2007, Oracle. All Rights Reserved.

Connected to an idle instance.

SQL> startup;

ORACLE instance started.

Total System Global Area 272629760 bytes

Fixed Size 1266996 bytes

Variable Size 96471756 bytes

Database Buffers 171966464 bytes

Redo Buffers 2924544 bytes

Database mounted.

Database opened.

SQL> show parameter service;

NAME TYPE VALUE

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

service_names string devdb

在rac2上执行

rac2-> export ORACLE_SID=devdb2

rac2-> sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Sun Jul 20 17:31:50 2014

Copyright (c) 1982, 2007, Oracle. All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production

With the Partitioning, Real Application Clusters, OLAP, Data Mining

and Real Application Testing options

SQL> show parameter service;

NAME TYPE VALUE

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

service_names string CRM, devdb

SQL>

在rac1上手工切换

rac1-> srvctl relocate service -d devdb -s crm -i devdb2 -t devdb1

rac1-> sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Sun Jul 20 17:35:28 2014

Copyright (c) 1982, 2007, Oracle. All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production

With the Partitioning, Real Application Clusters, OLAP, Data Mining

and Real Application Testing options

SQL> show parameter service;

NAME TYPE VALUE

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

service_names string CRM

SQL> alter system set service_names='CRM,devdb' scope=both
sid='devdb1';

System altered.

SQL> show parameter service;

NAME TYPE VALUE

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

service_names string CRM,devdb

(刚开始为啥只有CRM，没有devdb，还有待于研究。所以我在这里是手工修改了service_names参数)

在rac2上执行：

rac2-> sqlplus / as sysdba

SQL*Plus: Release 10.2.0.4.0 - Production on Sun Jul 20 17:39:03 2014

Copyright (c) 1982, 2007, Oracle. All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production

With the Partitioning, Real Application Clusters, OLAP, Data Mining

and Real Application Testing options

SQL> show parameter service;

NAME TYPE VALUE

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

service_names string devdb