Re: [rrd-users] Separating data by time of day

Hi Matthew,

you may want to use rrdtool fetch or xport to get the numbers out
for 'treatment'

there is curently no way of shifting day-bounderies ... if you have
an idea on how to aproach this from the configuration point of
view, so that it works across timezones and all, please discuss it
on the devl list ... many things are realy only a matter of
figuring out a good interface to configure this ... implementation
may be quite simple once it is clear how the logic should work ...

cheers
tobi


Yesterday Matthew Booth wrote:

> I collect in and out volume data from my router continuously at 15
> minute intervals. I use this to graph when I use bandwidth, and how
> much. I currently graph daily, weekly and monthly totals, as well as
> rate graphs.
>
> My ISP has the concept of a 'peak' period between 8am and 6pm. I would
> like to separate my daily, weekly and monthly totals into bandwidth used
> in the peak period, and bandwidth used outside that time. The following
> RPN zeroes all data points outside of that time period:
>
> LTIME,86400,%,DUP,28800,GT,EXC,64800,LE,+,2,EQ,in, 0,IF
>
> My problem is that I can't find a way to use this to create totals over
> a wider period than a single step. If I want to create a daily total,
> then I can't just use a step size of 1 day and multiply by 86400,
> because the time of that coalesced data point will be midnight, and I'll
> get a zero for the whole day. If I use a smaller step size, I can't find
> a way to aggregate multiple CDEF data points to create a daily total.
> Although I haven't tried it yet, the documentation tells me that COMPUTE
> won't work either, because you can't use TIME/LTIME.
>
> Is there anything I missed?
>
> Thanks,
>
> Matt
>
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>
>

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

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