[smokeping-users] does smokeping really work correctly?

[Tobias Oetiker]

Hi Wolfgang,

I don't know how fping reacts to ntp shifting time ...

one idea that pops to mind is that the way smokeping figures out
the 'data-range' to plot is not suited to the kind of data it is
looking at in your case ....

can you send me the output of

rrdtool dump

of the target in question, so that I can do some experimentation ?

cheers
tobi


> In the mean time (after zooming around), I found out, that if this significant
> spike that can be seen here:
> http://tiny.wogri.at/JV
> is included in graphing, the graph is wrong. If the spike is not visible in
> the graph, everything is fine.
>
> So I'm having an assumption here:
> * I'm using ntpd on this host to stay in sync with the correct time. may there
> be an issue here when NTP corrects the time backwards and smokeping does pings
> and somehow corrupts the rrd?
>
> How could I remove this malicious spike from my graphs?
>
> thanks;
> Wolfgang
>
> On Mar 25, 2008, at 14:09 , Tobias Oetiker wrote:
> > Hi Wolfgang,
> >
> > your graph does look a bit odd indeed. you can use the zoom
> > function to see if/when thre is a 'jump' in values displayed ...
> >
> > Since I am using the same code for all resolutions of the graph
> > I don't have an idea why you are seeing this behaviour (the graphs
> > on the demo site do not look like yours at all. see
> > http://oss.oetiker.ch/smokeping-demo/?target=Customers.OP.james-console)
> >
> > cheers
> > tobi
> >
> >
> > would Today Wolfgang Hennerbichler wrote:
> >
> > > Dear Smokeping users, dear Tobi,
> > >
> > > I wonder if the graphs I'm getting with smokeping can be correct...
> > > this is the graphs: http://tiny.wogri.at/JU
> > >
> > > You see that the average ping is aroound 400 and 500 useconds. In the
> > > last 30 hours view, you also see that the smoke nearly touches the 1ms
> > > border.
> > > How can it be, that the average smoke of a graph that never is getting
> > > higher than 1ms can be somewhere around 3 and 7 milliseconds in the
> > > last 10 days view?
> > > I'm sorry if I bother you with standard-question, but to me it just
> > > doesn't look correct.
> > >
> > > thanks for reading and your time, smokeping-people!
> > > Wolfgang
> > >
> > >
> >
> > --
> > Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
> > http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902
> >
>
>
>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902