[hobbit] ping test is too slow
thorsten.erdmann at daimler.com
thorsten.erdmann at daimler.com
Mon Jun 28 11:03:30 CEST 2010
Hello,
thanks for your answers and suggestions. But I fear I have some problems
understanding what you mean.
But first I think you need some more information. Most of our monitored
systems where monitored via IP-address, not via hostnames by using the
"testip" tag. Only 196 systems are tested using DNS-names.
> questy at gmail.com schrieb am 24.06.2010 16:08:04:
> Also, run a long-running ping test against an IP list and in another
> window against a domain name list.
How can I ping a domain? That does not work, I never heared that I can
ping a DNS domain name:
# ping de068.corpintra.net
ping: unknown host de068.corpintra.net
I can ping any host in that domain:
# ping s068t001.de068.corpintra.net
PING s068t001.de068.corpintra.net (53.42.8.236) 56(84) bytes of data.
64 bytes from s068t001.de068.corpintra.net (53.42.8.236): icmp_seq=0
ttl=127 time=0.266 ms
64 bytes from s068t001.de068.corpintra.net (53.42.8.236): icmp_seq=1
ttl=127 time=0.244 ms
64 bytes from s068t001.de068.corpintra.net (53.42.8.236): icmp_seq=2
ttl=127 time=0.268 ms
64 bytes from s068t001.de068.corpintra.net (53.42.8.236): icmp_seq=3
ttl=127 time=0.281 ms
64 bytes from s068t001.de068.corpintra.net (53.42.8.236): icmp_seq=4
ttl=127 time=0.261 ms
64 bytes from s068t001.de068.corpintra.net (53.42.8.236): icmp_seq=5
ttl=127 time=0.287 ms
64 bytes from s068t001.de068.corpintra.net (53.42.8.236): icmp_seq=6
ttl=127 time=0.233 ms
64 bytes from s068t001.de068.corpintra.net (53.42.8.236): icmp_seq=7
ttl=127 time=0.261 ms
It seems to make no difference if I ping the name with or without domain
or the IP address.
> If your DNS is not resolving properly, it can increase your ping
> times as well, because ping does a DNS lookup as well when it
> executes.
Ok, but then the turnaround time calculation of Hobbit would be wrong. The
20 seconds DNS resolve time is included in the ping test time, so it is
double calculated!?
> Check your DNS server/records, walk through your bb-hosts file to
> determine if something is timing out/not resolving, and I suspect
> you'll find the culprit
How can I check DNS server/records if I have no administrative access to
the DNS server. The DNS server entries on my Hobbit server seems to be
correct:
# cat /etc/resolv.conf
domainname de068.corpintra.net
search de068.corpintra.net
nameserver 53.42.4.22 # primary DNS server
nameserver 53.42.6.22 # secondary DNS server
But I think you are right with some DNS problems, because we have some
timing issues sometimes with accessing server shares and something. But I
don't know how to find out this. So if there is somebody out there who is
willing to help me resolving this, you man conatact me personally on
thorsten dot erdmann at daimler dot com, because this would be not a real
Hobbit related problem and so does not fit exactliy on this list.
> > resolution time never crawls above the microseconds all that much.
Your OP
> > states that sometimes it takes up to 20 seconds to get resolution, and
I'm
I think this meant that all DNS queries together in one run of the network
test is 20 seconds. At 196 hosts using DNS this would be 0.1 seconds per
host.
> > As much as I hate to suggest such a thing because of other potential
bugs,
> > could you gain any benefit from having nscd running on the Xymon host
only?
What do you mean with Xymon host _only_.
On my Hobbit host there seems to be no nscd running at all:
# ps -ef |grep nscd
root 1279 25262 0 11:00 pts/1 00:00:00 grep nscd
Should it run, if the Hobbit host is not a DNS server?
Thorsten Erdmann
> > ---
> > Jerald M. Sheets jr.
> >
> >
> >
> >
> > On Wed, Jun 23, 2010 at 9:09 AM, <thorsten.erdmann at daimler.com> wrote:
> >>
> >> Hello again
> >>
> >> Is there really no other option to speed up the ping test, maybe by
using
> >> multiple instance of fping/hobbitping. A collegue has the same issue
on a
> >> Hobbitserver running on HPUX.
> >> I am running Redhat EL.
> >>
> >> Thorsten Erdmann
> >>
> >>
> >> thorsten.erdmann at daimler.com schrieb am 18.06.2010 14:06:43:
> >>
> >> >
> >> > Hi
> >> >
> >> > > On Monday, 14 June 2010 19:12:33 White, Bruce wrote:
> >> > > > My experience with "hobbitping", is that it is just slower.
You are
> >> > > > better off downloading and installing "fping". Once you do
this,
> >> > > > you
> >> > > > will need to rebuild hobbit and select fping in the build
process.
> >> > >
> >> > > Instead of rebuilding hobbit, you can change FPING in
hobbitserver.cfg
> >> > > to
> >> > > "/path/to/fping -Ae " or similar.
> >> >
> >> > sorry for the delay. I just tried fping. But the turnaround time is
> >> > exactly the same, no benefit. Any other ideas?
> >> >
> >> >
> >> > bbtest-net version 4.2.0
> >> > SSL library : OpenSSL 0.9.7a Feb 19 2003
> >> > LDAP library: OpenLDAP 20213
> >> >
> >> > Statistics:
> >> > Hosts total : 834
> >> > Hosts with no tests : 20
> >> > Total test count : 819
> >> > Status messages : 820
> >> > Alert status msgs : 0
> >> > Transmissions : 10
> >> >
> >> > DNS statistics:
> >> > # hostnames resolved : 287
> >> > # succesful : 287
> >> > # failed : 0
> >> > # calls to dnsresolve : 289
> >> >
> >> > TCP test statistics:
> >> > # TCP tests total : 3
> >> > # HTTP tests : 2
> >> > # Simple TCP tests : 1
> >> > # Connection attempts : 3
> >> > # bytes written : 261
> >> > # bytes read : 1467
> >> >
> >> >
> >> > TIME SPENT
> >> > Event Starttime
> >> > Duration
> >> > bbtest-net startup 1276862496.735994
> >> > -
> >> > Service definitions loaded 1276862496.738353
> >> > 0.002359
> >> > Tests loaded 1276862496.780920
> >> > 0.042567
> >> > DNS lookups completed 1276862511.817886
> >> > 15.036966
> >> > Test engine setup completed 1276862511.823173
> >> > 0.005287
> >> > TCP tests completed 1276862511.825895
> >> > 0.002722
> >> > PING test completed (814 hosts) 1276862553.583528
> >> > 41.757633
> >> > PING test results sent 1276862553.718441
> >> > 0.134913
> >> > Test result collection completed 1276862553.718452
> >> > 0.000011
> >> > LDAP test engine setup completed 1276862553.718454
> >> > 0.000002
> >> > LDAP tests executed 1276862553.718455
> >> > 0.000001
> >> > LDAP tests result collection completed 1276862553.718456
> >> > 0.000001
> >> > NSLOOKUP tests executed 1276862554.634700
> >> > 0.916244
> >> > Test results transmitted 1276862554.700414
> >> > 0.065714
> >> > bbtest-net completed 1276862554.702291
> >> > 0.001877
> >> > TIME TOTAL
> >> > 57.966297
> >> >
> >> >
> >> > Thorsten Erdmann
> >> >
> >> > bgmilne at staff.telkomsa.net schrieb am 15.06.2010 12:32:39:
> >> >
> >> > >
> >> > > Regards,
> >> > > Buchan
> >> > >
> >> > > To unsubscribe from the hobbit list, send an e-mail to
> >> > > hobbit-unsubscribe at hswn.dk
> >> > >
> >> > >
> >> >
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thank
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>
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