Using a low TTL to enable a fail-over cluster?
Nate Campi
nate at campin.net
Fri Mar 22 19:47:48 UTC 2002
On Fri, Mar 22, 2002 at 07:20:41PM +0000, Barry Margolin wrote:
> In article <a7fs1h$irb at pub3.rc.vix.com>, Nate Campi <nate at campin.net> wrote:
> >
> >In reality, BIND and it's usage of RTT to find and use the fastest
> >responding nameserver makes this incorrect. Since most of the
> >nameservers out there are BIND, this has a visible effect on the
> >distribution of queries to most nameservers.
>
> Only if the response times are significantly different. It uses fuzzy
> comparisons of the RTT's, so if all the servers respond within a few
> percent of each other, they'll be treated equally.
Hence the usage of the word "most", as in "this has a visible effect on
the distribution of queries to most nameservers".
--
Nate
"Unix is the answer, but only if you phrase the question very carefully."
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