how to flush director dns ttl

[Per Buer]

Hi Gao,

On Wed, May 8, 2013 at 10:58 AM, Gao Yongwei <itxx00 at gmail.com> wrote:

>
>
>  The whole point of the DNS director and it's TTL settings is to have
>> Varnish automatically update the backend definitions based on TTL. So the
>> only option you have is AFAIK:
>> 1) To lower the TTL so it won't become a problem (speed up your DNS)
>> 2) To modify the DNS director and implement flushing through VCL
>>
>
> Thanks,perbu ,I can achieve  the first method ,  and could you please
> teach me more about the second method , how does this vcl look like ?
> many thanks , :-)
>

You would need to create a VMOD that kills off the cache in the DNS
director. For this to work you would probably need to modify the DNS
director in the Varnish Cache source.



-- 
 <http://www.varnish-software.com/> *Per Buer*
CEO | Varnish Software AS
Phone: +47 958 39 117 | Skype: per.buer
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