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
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