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Toni Andjelkovic wrote:
> hi to all,
>
> just built a VS-NAT for 2 web-servers following the instructions on
> your site, and i'd like to tell you how impressed i am.
>
Thank you!
>
> my setup is as follows: load balancer with 2 interfaces, eth0 points
> to 10.x.x.x, eth1 points to 192.168.x.x. where the real servers are
> located. i set up eth0:0 for listening to HTTP requests and
> passing them to the interior network. everything seems to work
> smoothly, and linux-vs made my day ;) thanks for this wonderful
> "hack".
>
> however, i notice a short latency (2 - 3 sec) whenever i request a page
> from the balancer "for the first time". what i mean by this is that
> i requested a few pages as a test, and there was an initial delay at
> the beginning of each session. i tested it, waited for about two hours, and
> requested the pages again, same thing, it hangs for 2-3 secs before
> delivering the first HTTP-response. it only affects the FIRST request, all
> consequent requests are being passed normally and quite fast.
>
> i don't believe it has to do with dns-lookups or the like, because i refer
> to the balancer with it's ip address. has anyone experienced any similar
> effects, or any idea on the reason?
>
I guess it is the reverse dns-lookup problem, do you configure the
reverse dns-lookup problem in your HTTP server? If so, please
use "nslookup" on the real servers to check whether to get the
hostname of the client from its IP address instantly.
Good luck,
Wensong
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