64 bytes from node1.oracleonlinux.cn (172.16.0.33): icmp_seq=3 ttl=64time=0.050 ms
64 bytes from node1.oracleonlinux.cn (172.16.0.33): icmp_seq=4 ttl=64time=0.034 ms
--- node1.oracleonlinux.cnping statistics ---
4 packets transmitted, 4 received, 0% packet loss,time 3000ms
rtt min/avg/max/mdev= 0.026/0.037/0.050/0.010 ms
[root@node1 ~]# ping node1.oracleonlinux.cn
PING node1.oracleonlinux.cn (172.16.0.33) 56(84) bytes of data.
64 bytes from node1.oracleonlinux.cn (172.16.0.33): icmp_seq=1 ttl=64time=0.038 ms
64 bytes from node1.oracleonlinux.cn (172.16.0.33): icmp_seq=2 ttl=64time=0.044 ms
64 bytes from node1.oracleonlinux.cn (172.16.0.33): icmp_seq=3 ttl=64time=0.047 ms
64 bytes from node1.oracleonlinux.cn (172.16.0.33): icmp_seq=4 ttl=64time=0.041 ms
--- node1.oracleonlinux.cnping statistics ---
4 packets transmitted, 4 received, 0% packet loss,time 3001ms
rtt min/avg/max/mdev= 0.038/0.042/0.047/0.007 ms
[root@node1 ~]#
最后，看完之后，你有答案了吗？现在你知道了部署Oracle RAC时为什么需要将/etc/hosts文件里的环路地址修改为
127.0.0.1 localhost
格式吗？