[smokeping-users] Re: Meaning of the values stored in rrd fileof smokeping

[Tobias Oetiker]

Today Atul Gosain wrote:

>
> Thanks tobi for such a quick response.
> I have one more query.
> Actually the application in which i want to use that data needs ping
> results after every minute.So for that i have to change the step value
> as 60 sec instead of 300. But after doing that, the formatting of the
> graph did not changed and everything is as it was before, allthough it
> should have more blocks between 20 min interval in the graph.(or it has
> fixed format for the graph ie. it will show value after 300 sec).

note that the stepping of a graph only changes when rrd files are
created from scratch ... the step of exising rrd files does not
change
>
> What does these values(below) mean in the smokeping config files. I
> couldnt understand their use correctly.Allthough i have read the
> tutorial of the RRDTool and also the man page, and i know the meaning of
> these RRA's individually but i couldnt get their meaning in this
> context. Why are these AVERAGE and MIN,MAX defined again and again with
> different values.

rrd stores data at different resolutions for different amounts of
time ... the idea is, that the older the data gets the less
interested you are in fine resolution ...

The config below is what I recomment for smokeping, even though it
is storing way more information than the current interface displays
.. but while we are at it, we might as well store the info maybe
someone comes up with a nice analysis later ...

individual values are the rrdtool create parameters for RRA

cheers
tobi
>
> AVERAGE  0.5   1  1008
> AVERAGE  0.5  12  4320
>     MIN  0.5  12  4320
>     MAX  0.5  12  4320
> AVERAGE  0.5 144   720
>     MAX  0.5 144   720
>     MIN  0.5 144   720
>
> Thanks
> Atul.
>
>
> Tobias Oetiker wrote:
>
> >Today Atul Gosain wrote:
> >
> >>Hi
> >>
> >>I am using smokeping and i want to use the data stored by smokeping in
> >>rrd in some other application. I can do this only if i know the exact
> >>meaning of all the fields which are not clear to me presently.
> >>Can some smokeping user or the creator can tell what exactly the loss
> >>and median values represent.
> >>I assume that loss value is given in % like below  9.533333333e+00
> >>represent 9.53% packet loss and median ie. 5.90126666667e-01 means .5901
> >>seconds
> >>Am i correct? If not then please correct me.
> >>
> >> uptime          loss        median         ping1         ping2
> >>ping3         ping4
> >>        ping5         ping6         ping7         ping8
> >>ping9        ping10        ping11        ping12        ping13
> >>ping14        ping15        ping16        ping17        ping18
> >>ping19        ping20
> >>
> >>1034863500: nan 9.5333333333e+00 5.9012666667e-01 5.4466866667e-01
> >>5.4843000000e-01 5.4973133333e-01 5.6049600000e-01 5.6867666667e-01
> >>5.8955000000e-01 5.9096400000e-01 5.9698200000e-01 5.9911466667e-01
> >>6.0565133333e-01
> >>nan nan nan 5.6673000000e-01 5.7433000000e-01 5.7540000000e-01
> >>5.8063000000e-01 5.8361000000e-01 5.8625000000e-01 6.0690000000e-01
> >>
> >
> >Atul
> >
> >pings are stored in seconds, this is correct
> >
> >loss is absolute ... it is the number of lost packets in a single
> >interval or the average number of packets lost per interval ...
> >
> >cheers
> >tobi
> >
> >
> >>Thanks
> >>Atul
> >>
> >>--
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> >
>
>
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