http://blog.csdn.net/hijk139/article/details/7452553
http://blog.itpub.net/4227/viewspace-677272/
http://www.itpub.net/thread-1799287-1-1.html
https://my.oschina.net/liupengjun/blog/333234
Oracle RAC 连接
原文：http://www.cnblogs.com/diyunpeng/p/6095794.html
