Oracle RAC 主備切換實驗（主庫雙節點RAC到單節點備庫）

本實驗環境如下：
主庫Oracle RAC雙節點
node1 192.168.169.111
node2 192.168.169.222

備庫爲Oracle單節點
192.168.169.123

操作步驟

1、主庫修改相關參數 fal_client、fal_server：

SQL> show parameter spfile;

NAME				     TYPE	 VALUE
------------------------------------ ----------- ------------------------------
spfile				     string	 +DATA/devdb/spfiledevdb.ora
SQL> show parameter fal

NAME				     TYPE	 VALUE
------------------------------------ ----------- ------------------------------
fal_client			     string
fal_server			     string
SQL> alter system set fal_client='devdb1' sid='devdb1';

System altered.

SQL> alter system set fal_client='devdb2' sid='devdb2';

System altered.

SQL> alter system set fal_server='phydb' sid='*';

System altered.

SQL> show parameter fal

NAME				     TYPE	 VALUE
------------------------------------ ----------- ------------------------------
fal_client			     string	 devdb1
fal_serv