Re: [LARTC] API using cbq / tc ?

[devik <devik@cdi.cz>]

> > So if you use 5s interval in rrd it seems ok for me (it
> > is what i plan to do here).
> If you receive an update each second, you have the feeling it's realtime.
> It's slow enough to understand the data and it's fast enough to feel it as
> real-time.  It's also fast enought that you get new data before you are tired
> to look at the old data.

hmm :) really depends on angle of view .. From my experience
("btw" tool) 1sec is too fast because I see results like:
30kbit, 28, 10, 33,15,35 .... I can see every packet burst
and thus my brain is not good enough to compute average from it
on fly. So I use 10sec moving average to have something senseful.

On other side, there are two time variables :
- show rate
- EWMA time constant

I agree that you can have time constant 30sec and
sampling/show rate 1sec. Then you get smooth and fast
updates :)
Still you can use rrd because it is hierarchical - you
can have last minute in secs resolution, then last hour
in minutes resolution etc...

devik

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