Re: [squid-users] External DNS Program

>But you are quite likely to notice the drawbacks of the external DNS
>helper if you use it. If DNS lookups are slow then the external DNS
>helper will hit the roof and no further DNS lookups can complete (some
>Squid versions even abort in such case).

Will multiple external DNS helpers help improve performance of DNS lookups?

Peace.....

Tom

Henrik Nordstrom <hno@hem.passagen.se>@hem.passagen.se on 04/18/2001
01:30:50 PM

Sent by: hno@hem.passagen.se

To: jack <sa_jill@yahoo.co.uk>
cc: Squid Users <squid-users@squid-cache.org>
Subject: Re: [squid-users] External DNS Program

jack wrote:

> mm... What is the advantage of using external dns program rather then
> using internel dns...?

The external dns program uses the normal reslover libraries which is a
much more mature DNS client. The internal DNS client still has some
problems with special cases in the DNS protocol. However, things has
gotten a lot better compared to the early version so you are not likely
to notice any of these issues, and is heavily outweighted by the
improved performance and reliability.

But you are quite likely to notice the drawbacks of the external DNS
helper if you use it. If DNS lookups are slow then the external DNS
helper will hit the roof and no further DNS lookups can complete (some
Squid versions even abort in such case).

Recommendation: Use the internal DNS client unless you experience
problems which forces you to use the external one until a fix is
provided.

--
Henrik Nordstrom
Squid Hacker, http://www.marasystems.com/