RAC 客户端配置说明

在ORACLE RAC 环境下，为了做到高可用性，需要对客户端的tnsnames.ora这个文件进行配置。以下所示为配置示例

XJSK =

(DESCRIPTION =

    (ADDRESS_LIST =

      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.13)(PORT = 1521))

      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.14)(PORT = 1521))

    )

   (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = xjsk)

      (INSTANCE_NAME = xjsk1)

      (INSTANCE_ROLE = PRIMARY)

      (FAILOVER_MODE =

        (BACKUP = XJSK_BACKUP)

        (TYPE = SELECT)

        (METHOD = BASIC)

        (RETRIES = 30)

        (DELAY = 5)

      )

    )

)

XJSK_BACKUP =

(DESCRIPTION =

    (ADDRESS_LIST =

      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.14)(PORT = 1521))

      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.13)(PORT = 1521))

    )

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = xjsk)

      (INSTANCE_NAME = xjsk2)

      (INSTANCE_ROLE = PRIMARY)

      (FAILOVER_MODE =

        (BACKUP = XJSK)

        (TYPE = SELECT)

        (METHOD = BASIC)

        (RETRIES = 30)

        (DELAY = 5)

      )

    )

)

在以上示例中所标红色部分为TNS的别名及备份TNS别名，可按用户应用的需要自行修改。

在以上示例中所标蓝色部分，分别为RAC数据库的服务名和各节点的实例名，可按节点数量的不同及服务名的不同自行修改。