rac下的tnsname的写法

LISTENERS_ORCL =
  (ADDRESS_LIST =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.92.131.2)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.92.131.4)(PORT = 1521))
  )

ORCL2 =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.92.131.4)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
      (INSTANCE_NAME = orcl2)
    )
  )

ORCL1 =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.92.131.2)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
      (INSTANCE_NAME = orcl1)
    )
  )