Oracle RAC 환경 JDBC 설정

https://docs.oracle.com/cd/E57185_01/EPMIS/apbs01s01.html

jdbc:oracle:thin:@(DESCRIPTION=
@    (FAILOVER = on)
@    (LOAD_BALANCE=on)
@    (ADDRESS=(PROTOCOL=TCP)(HOST=host1)(PORT=1521))
@    (ADDRESS=(PROTOCOL=TCP)(HOST=host2)(PORT=1521))
@    (CONNECT_DATA=(SERVICE_NAME=service_name)))

이때 우선순위는 첫번째 host1 이다. (LOAD_BALANCE=off) 일 경우