How to clear name cache on sun solaris?

[Kevin Darcy]

When its "hosts" cache is enabled, nscd caches *all* hostname lookups, whether
they are resolved through DNS or the /etc/hosts file. If the records come from
DNS, it disrespects the TTL values on those records, and (at least in older
versions of nscd) interferes with round-robin.

If you're running a local caching nameserver, the "hosts" cache of nscd is
nothing but a pointless waste of resources.


-Kevin

Kerry M. Liles wrote:

> I've been lurking in this thread for a while... what possible interaction
> could nscd have with DNS?
>
> Doesnt nscd cache lookups that the local machine itself is making, not the
> answers that named coughs up...?
>
> Specifically, we are running Bind 8.2.3 on Solaris 7 and after seeing this
> thread I wonder why we even bother to run nscd, but I still cannot see how
> the two would interact at all. Can anyone enlighten me?
>
> BTW, if I do a   nscd -g  on that machine (which only reason to exist is
> DNS), it looks like nscd has about 91% hit rate on /etc/hosts (is that what
> hosts cache means?) and furthermore, there were almost 500,000 positive
> cache hits on hosts...
> The /etc/host file on that machine has 3 entries (localhost loghost
> mailhost)....
>
> TIA
>
> "Kevin Darcy" <kcd at daimlerchrysler.com> wrote in message
> news:9a2qm0$fkv at pub3.rc.vix.com...
> >
> > Matthew SAMS wrote:
> >
> > > On Fri, 30 Mar 2001, Chip Old wrote:
> > >
> > > > Do you really need nscd's hosts cache?
> > >
> > > You do if you're running Netscape 4.75 on Solaris 8.
> >
> > Why do you think I'm still running a moldy old version of Nutscrape?
> > I find this a lesser evil than running nscd. When Mozilla stabilizes
> > and/or gets faster, I'll probably run that.
> >
> > I concur, of course, with Brad's assessment of nscd being the spawn of
> > Satan (although in our standard Slowlaris load, we just disable the
> > hosts cache and still let it cache all the other stuff).
> >
> >
> > - Kevin
> >
> >
> >
> >