[hobbit] Strange rrd problem

[Thomas Kaehn]

Hi,

On Fri, Jul 13, 2007 at 07:55:44AM -0400, s_aiello at comcast.net wrote:
> On Friday 13 July 2007 07:35, Thomas Kaehn wrote:
> > On Fri, Jul 13, 2007 at 12:49:22PM +0200, Henrik Stoerner wrote:
> > > As for the diamond-shaped graph - yes, this is quite puzzling.
> > > I've had a couple of other reports (see e.g. this thread:
> > > http://www.hobbitmon.com/hobbiton/2005/10/msg00332.html).
> > > We haven't been able to figure out why this happens, the data
> > > that goes into the RRD file look sane.
> >
> > The data in the rrd file looks strange however when dumped using
> > rrdtool. So every other value is different.
> >
> Would this somehow be linked to the ping graphs I see that form 'ramps' ? Does 
> anyone else see these 'ramps' ? Most of my host ping times show the same 
> pattern. So this would define the problem to be in Hobbit, or in my 
> network ;) The BigBrother server, running in parallel with Hobbit, doesn't 
> show this pattern. I am using the hobbitping tool. The small home hobbit 
> server, I run, doesn't show this pattern 'ramp' pattern. 
> 
> You can see a sample graph at, 
> http://jentoo.homedns.org:8080/pub/download/pingtimes.png

this could be a similar problem. I've seen that the bbtest graph
corresponds to the network tests showing a wrong graph. Maybe the
problem is caused by bbtest-net?

Please compare:

http://www.westend.com/bbtest.png

http://www.westend.com/pop.png

Is there any possibility to debug this problem?

Ciao,
Thomas
-- 
Thomas Kähn                   WESTEND GmbH  |  Internet-Business-Provider
Technik                       CISCO Systems Partner - Authorized Reseller
                              Im Süsterfeld 6          Tel 0241/701333-18
tk at westend.com                D-52072 Aachen              Fax 0241/911879
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Die Gesellschaft ist eingetragen im Handelsregister Aachen unter HRB 7608
Geschäftsführer:           Thomas Neugebauer, Thomas Heller, Michael Kolb