[CentOS] resolving names it is really slow slow with CentOS5.x using named
Robert Heller
heller at deepsoft.com
Tue May 26 11:06:49 UTC 2009
At Mon, 25 May 2009 19:52:18 -0400 CentOS mailing list <centos at centos.org> wrote:
>
> On Mon, May 25, 2009 at 5:23 PM, carlopmart <carlopmart at gmail.com> wrote:
> > Victor Padro wrote:
> >>
> >>
> >> On Mon, May 25, 2009 at 4:05 PM, carlopmart <carlopmart at gmail.com
> >> <mailto:carlopmart at gmail.com>> wrote:
> >>
> >> RobertH wrote:
> >> > ive read most of the thread, yet not all. forgive me as i might
> >> have missed
> >> > some of this below in helping...
> >> >
> >> > carlopmart,
> >> >
> >> > what is in your /etc/resolv.conf
> >>
> >> search hpulabs.org <http://hpulabs.org>
> >> nameserver 127.0.0.1
> >>
> >> >
> >> > is it configured correctly?
> >> >
> >> > are you using ipv6?
> >>
> >> no.
> >>
> >> >
> >> > if not, is it fully disabled / turned off?
> >> >
> >> > in modprobe.conf put
> >> >
> >> > alias net-pf-10 off
> >> > alias ipv6 off
> >>
> >> I have configured this previously ..
> >>
> >>
> >> >
> >> > reboot...
> >> >
> >> > also, are you loading those other opsys on the same machine and
> >> getting good
> >> > results or different machines?
> >>
> >> I have good results using different operating systems but using same
> >> hardware ..
> >>
> >>
> >> >
> >> > testing other opsys on different hardware could be problematic.
> >> >
> >> > did you bother to check the physical ports to see if any problems
> >> in the
> >> > switch or with ethtool on the server interface ?
> >>
> >> No, I didn't do it because i have good results using other opsys ...
> >> >
> >> > thoughtfully consinder following advise of others re: tcp and dns
> >> >
> >> > cables...
> >> >
> >> > - rh
> >> >
> >> > _______________________________________________
> >> > CentOS mailing list
> >> > CentOS at centos.org <mailto:CentOS at centos.org>
> >> > http://lists.centos.org/mailman/listinfo/centos
> >> >
> >>
> >>
> >> --
> >> CL Martinez
> >> carlopmart {at} gmail {d0t} com
> >> _______________________________________________
> >> CentOS mailing list
> >> CentOS at centos.org <mailto:CentOS at centos.org>
> >> http://lists.centos.org/mailman/listinfo/centos
> >>
> >>
> >> Have you double checked your SELinux config?
> >
> > SeLinux is disabled on both CentOS servers ...
>
> For what it is worth, you may want to double-check via chkconfig. I
> once told initial configuration of a CentOS box to disable SELinux,
> only to discover chkconfig still had it enabled. As soon as I told
> chkconfig to disable it, it was off.
>
> Same for the firewall. During initial config, turned it off.
> chkconfig revealed it was on.
> I manually told chkconfig ip6tables off and iptables off, and only
> then did it stick.
You don't want to use chkconfig to turn on/off the firewall (iptables).
This is controled by the presense (or not) of /etc/sysconfig/iptables!
Which in turn is controlled by system-config-securitylevel.
>
> It is worth double-checking these things - a simple chkconfig
> --list|grep :on to see what services are on they you may _not_ want
> on, and maybe, conversely, chkconfig --list|grep :off to check
> disabled services you may _want_ on.
>
> Scott
>
> >
> >>
> >> You said you tested different OS'es on the same hardware? or tested
> >> different OS'es on the same hardware but different servers?
> >
> > Same hardware and same server, because all opsys are installed on a ESXi 3.5u4
> > server with vmware tools ...
> >
> >>
> >> Maybe remotely could be a faulty NIC.
> >
> > Maybe, but why only centos have problems??
> >
> >
> >>
> >>
> >>
> >> --
> >> "It is human nature to think wisely and act in an absurd fashion."
> >>
> >> "Todo el desorden del mundo proviene de las profesiones mal o
> >> mediocremente servidas"
> >>
> >>
> >> ------------------------------------------------------------------------
> >>
> >> _______________________________________________
> >> CentOS mailing list
> >> CentOS at centos.org
> >> http://lists.centos.org/mailman/listinfo/centos
> >
> >
> > --
> > CL Martinez
> > carlopmart {at} gmail {d0t} com
> > _______________________________________________
> > CentOS mailing list
> > CentOS at centos.org
> > http://lists.centos.org/mailman/listinfo/centos
> >
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>
>
--
Robert Heller -- 978-544-6933
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