[PLUG] nscd
chris (fool) mccraw
gently at gmail.com
Tue Oct 18 17:49:01 UTC 2011
On Tue, Oct 18, 2011 at 10:41, Paul Heinlein <heinlein at madboa.com> wrote:
> The first question I'd ask is, why is your local DNS resolver not
> caching the results. Most sites provide DNS TTLs of over an hour;
(site in question has an hour TTL set in its SOA record)
> For most sites, however, your local nameserver should return the
> address for a frequently asked hostname in just 10s of milliseconds.
>
> Who provides your DNS service?
google :( [8.8.8.8]
to be honest, i just realized what is going on. i have a huge
download streaming in the background which is saturating my pipe, so
that *all* lookups that go over the wire are actually taking that
long. i just wasn't noticing as much since my connection to gmail and
twitter is basically streaming or anyway less frequently connecting
and dropping.
> I know that Fedora and Red Hat are migrating away from nscd to sssd,
> which (afaict) is intended strictly for authentication caching and
> doesn't support DNS caching.
i came to understand that to be the main point of nscd too but used it
for dns caching since it was already running.
> Even on machines I manage that rely on nscd, I don't use it to cache
> DNS results. I'd rather setup a caching nameserver. Use aptitude to
> search for dnsmasq, a lightweight DSN forwarder.
thanks, i'll check out options along those lines.
More information about the PLUG
mailing list