oracle判断是否实施了rac

http://blog.csdn.net/pan_tian/article/details/11518833

方法一

• 实施了RAC

SQL> show parameter cluster_database;  
NAME                                 TYPE        VALUE  
------------------------------------ ----------- ------------------------------  
cluster_database                     boolean     TRUE  

cluster_database_instances           integer     2  

• 未实施RAC

SQL> show parameter cluster_database;  
NAME                                 TYPE        VALUE  
------------------------------------ ----------- ------------------------------  
cluster_database                     boolean     FALSE  
cluster_database_instances           integer     1  

方法二

select * from v$option WHERE Parameter = 'Real Application Clusters';  

方法三

SELECT * from v$active_instances;  

Output

INST_NUMBER        INST_NAME
1                       xyzdb1:abprod1
2                       xyzdb2:abprod2