[Users] Delayed signalling?

[Max Gregorian]

Just out of interest, is DNS caching required or recommended on the servers
themselves?

I checked and *nscd* is present in the current installed version of CentOS
on all the servers without the need for downloads or updates (at least from
the packages I selected before installing). It just hasn't been configured
and as far as I can tell, is not running.

Also, what sort of performance should I expect from these servers given the
specs I mentioned before, in terms CPS, for example. Not necessarily looking
for a definitive figure, but at least a ball-park figure - say a bare
minimum (50 CPS min. or above maybe?).




On 12/19/06, Daniel-Constantin Mierla <daniel at voice-system.ro> wrote:
>
> On 12/15/06 21:27, Jiri Kuthan wrote:
> > At 10:37 15/12/2006, Daniel-Constantin Mierla wrote:
> >
> >
> >
> >> On 12/14/06 17:03, samuel wrote:
> >>
> >>> It might be due to a DNS query....whenver a request has to be
> >>> forwarded to a domain, openSER makes a DNS query to resolv the IP.
> >>> During this operation, the child processing the request will not
> >>> answer to further incoming messages.
> >>>
> >> If proves to be because of DNS, the best is to install nscd (name
> service cache daemon) which will speed-up a lot DNS interaction. Having it
> in the system will help other applications to do DNS queries faster (e.g.,
> asterisk, mail servers ...). It looks to be really powerful being able to
> cache many services, not only DNS. It comes packaged with most of common
> distributions.
> >>
> >
> > Actually we have tried this one and yet another one (whose name I can't
> recall)
> > and there were some reliability issues. Unfortunately, I remember this
> very remotely,
> > cc-ed thus serusers as this debate was there once going on -- hopefuly
> someone
> > with better memory than myself will speak up.
> >
> nscd is part of GNU C Library, I am sure a lot of people will be happy
> to learn about and many will strive to fix as soon as possible, if you
> can describe the issues you had with it -- it is part of a core
> component in all Unixes.
>
> Also, the name of the other one and the issues will help the developers
> to make it better -- testing and feedback is the most appreciated.
>
> Cheers,
> Daniel
>
>
>
> > -jiri
> >
> > --
> > Jiri Kuthan            http://iptel.org/~jiri/
> >
> >
> >
>
> _______________________________________________
> Users mailing list
> Users at openser.org
> http://openser.org/cgi-bin/mailman/listinfo/users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kamailio.org/pipermail/users/attachments/20061220/005ca517/attachment.htm