Oracle cluster url configuration plsql connection configuration in oracle cluster in plsql and java program connection mode not in cluster plsql connection configuration: www.2cto.com DB1_193 = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP) (HOST = 59.208.39.193) (PORT = 1521) (CONNECT_DATA = (SERVICE_NAME = bester) url of a non-cluster java connection = jdbc: oracle: thin: @ 127.0.0.1: 1521: plsql connection configuration in bester oracle cluster: db_1_2 = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP) (HOST = 59.208.39.193) (PORT = 1521 )) (ADDRESS = (PROTOCOL = TCP) (HOST = 59.208.39.195) (PORT = 1521) (LOAD_BALANCE = yes) (CONNECT_DATA = (SERVICE_NAME = bester ))) the url datasource connected by java programs in the oracle cluster. url = jdbc: oracle: thin: @ (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP) (HOST = 59.208.39.193) (PORT = 1521) (ADDRESS = (PROTOCOL = TCP) (HOST = 59.208.39.195) (PORT = 1521) (LOAD_BALANCE = yes) (CONNECT_DATA = (SERVICE_NAME = bester )))