how to flush director dns ttl

[Gao Yongwei]

Hello,lists:
I am using varnish in a CentOS6.4 box,bellow is version info:

[root at cdn001 ~]# uname -r
2.6.32-358.2.1.el6.x86_64
[root at cdn001 ~]# rpm -q varnish
varnish-3.0.3-3.el6.art.x86_64

and in my /etc/varnish/default.vcl
I use ' dns director':

director dnsdomain dns {
    .list = {
        .port = "80";
        "10.0.0.0"/24;
    }
    .ttl = 12h;
}
notice that the ttl has been set to 12h because I want to reduse dns
resolve time,there is a domain www.example.com which resolved to 10.0.0.2
,after the dns changed www.example.com to 10.0.0.3, varnish cannot find the
real backend as the ttl  been set to 12h.so I must do a 'service varnish
reload' to update the director.

Is there any other way to flush the director ttl without  a service reload
?  thanks.
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