[rrd-users] How would you handle this?

Dave Wombat dave.wombat at gmail.com
Fri Apr 23 00:47:15 CEST 2010

On Thu, Apr 22, 2010 at 3:34 PM, Simon Hobson <linux at thehobsons.co.uk> wrote:
> Ulf Zimmermann wrote:
>>I am looking at the logs of our fax servers, which run a card by
>>Eicon. The logfile has information like call direction, which I
>>would want to track as in, out and total, call time (start of call),
>>call duration and port number plus other information which for
>>tracking purpose I don't care about.
>>I am thinking about running a script on this to feed into RRD maybe,
>>like once an hour to check the previous hour. But how would you
>>organize this in RRD?
> RRD will only track rates, so you cannot use it to track individual
> calls or their start times. You could track number of calls, and
> total durations.
> For logging number of calls, there are two ways of doing it. One is
> to total the calls per unit of time in your scripts, and pass this in
> as a data type absolute. The other would be to do an update for each
> call and feed in the value 1 for each call made/received - again data
> type absolute and assuming you don't ever have two calls on the same
> second.
> Similarly, for call durations, you can either add them up for each
> time period and do an update with that total, or do an update for
> each call.
> --
> Simon Hobson

I did something very much like what Simon describes except it was for
PRI circuits (23 channels) and not a single FAX.  The call volume across
the PRI made for interesting graphs.

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