JDBC连接Oracle RAC

1)JDBC连接的配置方式
,既然数据库本身已经支持了RAC,那么只要在JDBC连接字符串中将RAC的配置加上去即可, 根据资料和目前的业务需求,我们的针对HOST=10.87.25.37这台主机的数据库实例的JDBC连接字符串应该这样配置
  
   URL="jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)
   (HOST=10.87.25.37)(PORT=1521))(ADDRESS=(PROTOCOL=TCP)
   (HOST=10.87.25.38)(PORT=1521))
   (HOST=10.87.25.39)(PORT=1521))
(FAILOVER=on)(LOAD_BALANCE=off))
   (CONNECT_DATA= (SERVICE_NAME=bidwb)))"
  
   这个连接配置表示只支持failover,不支持loadbalance.根据蓝色字符串可以表示.即按照顺序,使用该JDBC字符串获取的连接,将根据配置的主机的先后顺序,依次进行failover
   即如果在10.87.25.37数据库实例不能被访问,那么就转到10.87.25.38执行,如果10.87.25.38也数据库实例不能被访问,那么就转到10.87.25.39执行
同理
对于HOST=10.87.25.38这台主机的数据库实例的JDBC连接字符串应该这样配置
URL="jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)
   (HOST=10.87.25.38)(PORT=1521))(ADDRESS=(PROTOCOL=TCP)
   (HOST=10.87.25.39)(PORT=1521))
   (HOST=10.87.25.37)(PORT=1521))
(FAILOVER=on)(LOAD_BALANCE=off))
   (CONNECT_DATA= (SERVICE_NAME=bidwb)))"
对于HOST=10.87.25.39这台主机的数据库实例的JDBC连接字符串应该这样配置
URL="jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)
   (HOST=10.87.25.39)(PORT=1521))(ADDRESS=(PROTOCOL=TCP)
   (HOST=10.87.25.37)(PORT=1521))
   (HOST=10.87.25.38)(PORT=1521))
(FAILOVER=on)(LOAD_BALANCE=off))
   (CONNECT_DATA= (SERVICE_NAME=bidwb)))"
即只是各个Host的顺序不同
2)本地服务名连接的配置方式
对于HOST=10.87.25.37这台主机的数据库实例的本地服务名应该这样配置


 37bidwb =


 (DESCRIPTION = 


    (ADDRESS_LIST= 


     (ADDRESS= (PROTOCOL = TCP)(HOST = 10.87.25.37)(PORT = 1521))


     (ADDRESS= (PROTOCOL = TCP)(HOST = 10.87.25.38)(PORT = 1521))


     (ADDRESS= (PROTOCOL = TCP)(HOST = 10.87.25.39)(PORT = 1521))


     (FAILOVER = on)


     (LOAD_BALANCE = off)


    )   


    (CONNECT_DATA= (SERVICE_NAME = bidwb))


 )


 
对于HOST=10.87.25.38这台主机的数据库实例的本地服务名应该这样配置


 37bidwb =


 (DESCRIPTION = 


    (ADDRESS_LIST= 


     (ADDRESS= (PROTOCOL = TCP)(HOST = 10.87.25.38)(PORT = 1521))


     (ADDRESS= (PROTOCOL = TCP)(HOST = 10.87.25.39)(PORT = 1521))


     (ADDRESS= (PROTOCOL = TCP)(HOST = 10.87.25.37)(PORT = 1521))


     (FAILOVER = on)


     (LOAD_BALANCE =off)


    )   


    (CONNECT_DATA= (SERVICE_NAME = bidwb))


 )


 
对于HOST=10.87.25.39这台主机的数据库实例的本地服务名应该这样配置


 37bidwb =


 (DESCRIPTION = 


    (ADDRESS_LIST= 


     (ADDRESS= (PROTOCOL = TCP)(HOST = 10.87.25.39)(PORT = 1521))


     (ADDRESS= (PROTOCOL = TCP)(HOST = 10.87.25.37)(PORT = 1521))


     (ADDRESS= (PROTOCOL = TCP)(HOST = 10.87.25.38)(PORT = 1521))


     (FAILOVER = on)


    (LOAD_BALANCE = off)


    )   


    (CONNECT_DATA= (SERVICE_NAME =bidwb))


 )