如何即时更新机器DNS缓存

me_single

RT,
ipconfig /flushdns 这个好像是wins机器的
linux机器如何让机器即时更新缓存，因现在做测试，A记录每半小时切换一次。
请各位达人赐教

llzqq

linux/unix 本身是不会缓存解析记录的，除非你人为安装了dnscache软件。举个简单的例子：


[root@ns1 root]#ping test.aidns.cn
PING test.aidns.cn (2.2.2.2): 56 data bytes
^C
--- test.aidns.cn ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
[root@ns1 root]#ping test.aidns.cn
PING test.aidns.cn (2.2.2.4): 56 data bytes
^C
--- test.aidns.cn ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
[root@ns1 root]#ping test.aidns.cn
PING test.aidns.cn (2.2.2.4): 56 data bytes
^C
--- test.aidns.cn ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
[root@ns1 root]#ping test.aidns.cn
PING test.aidns.cn (2.2.2.3): 56 data bytes
^C
--- test.aidns.cn ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
[root@ns1 root]#ping test.aidns.cn
PING test.aidns.cn (2.2.2.2): 56 data bytes
^C
--- test.aidns.cn ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
[root@ns1 root]#ping test.aidns.cn
PING test.aidns.cn (2.2.2.3): 56 data bytes
^C
--- test.aidns.cn ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
[root@ns1 root]#ping test.aidns.cn
PING test.aidns.cn (2.2.2.4): 56 data bytes
^C
--- test.aidns.cn ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
[root@ns1 root]#ping test.aidns.cn
PING test.aidns.cn (2.2.2.3): 56 data bytes
^C
--- test.aidns.cn ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss

基本上每次解析的结果是轮询的，如果缓存结果的话不是这个效果

[ 本帖最后由 llzqq 于 2010-1-14 11:05 编辑 ]