[Orca-users] Re: Graphing Very Low Freq. Data

[Blair Zajac]

RRDtool will interpolate the data to integral multiples of the
measurement interval.  In this case, it may be best to measure
the data at either local midnight or GMT midnight.  I don't know
which one RRDtool uses for data that is measured on a daily
interval.

Regards,
Blair

orca at cwe.com wrote:
> 
> The global config 'interval' is set to once a day, the reading is
> taken at 10:30am. I assumed the problem was with the data
> crunching, that RRDtool does, to squeeze the data into weekly and
> monthly graphs, without the log files growing the exponentially. I am
> looking through the man page for RRDs now, it will probably take
> awhile, since I am little clueless as to how this thing works.
> Thanks,Jim
> 
> --- In orca-users at egroups.com, Blair Zajac <blair at a...> wrote:
> > Jim,
> >
> > A couple of questions:
> >
> > Have you updated the interval parameter in the configuration file to
> > reflect that the data is updated some a day?  Is the measurement
> > made at the beginning of the day or sometime in the middle of the
> > day?
> >
> > This issue is more to do with RRDtool than with Orca.  I'd look into
> > RRDtool to see how to resolve this.
> >
> > Regards,
> > Blair
> >
> > Jim Sanders wrote:
> > >
> > > Hello,
> > >
> > >     I have orca up and running and it works without a problem
> except when I try to sample very
> > > low frequency data...ie updated once a day. The graphs always show
> an extra data point
> > > adjacent to any change. For instance the 5 data points 0 0 0 10 0
> will be graphed as 0 0 2 8 0
> > > in the weekly and monthly graphs. Is it possible to use orca with
> such low freq. data?
> > > Can you suggest software better suited for such an application?
> > >
> > > Thanks, Jim