[rrd-users] Newbie question

[Tobias Oetiker]

Dan,

also note that a 'rrdtool' day is always measured in GMT, if you
want a 'local' day you must make sure you have a 3600 step since
hours match between GMT and your local timezone.

Also note that your 'logins' per day count is of type 'ABSOLUTE'
not 'GAUGE'

to get the 'right' number out again, you have to multiply the
output with 86400 since rrdtool deals with
rates and not absolute number. for the rest, I can only underscore
what /andy just told you ...

cheers
tobi


> Dan,
>
> There's been a very recent, and sometimes unpleasant, discussion on this
> topic on this very list; check the list archive for January at
> <https://lists.oetiker.ch/pipermail/rrd-users/2008-January/thread.html>.
>
> Regards,
> /andy
>
> Dan Richman wrote:
> > Hello all -
> >
> > I'm new to RRDtool and trying to track DAILY logins to a website.  So
> > each day we will update the RRD with a count of the logins for that
> > day.  This was my create syntax:
> >
> > rrdtool create logins.rrd
> > --start 1138856400
> > --step 86400
> > DS:logins:GAUGE:86400:U:U
> > RRA:AVERAGE:0.5:1:1825
> > RRA:AVERAGE:0.5:30:60
> > RRA:AVERAGE:0.5:60:30
> > RRA:AVERAGE:0.5:90:20
> >
> > As you can see, I'm keeping averages for 30 days, 60 days, and 90 days.
> >
> > Thing is, when I run the results:
> >
> > rrdtool fetch logins.rrd AVERAGE --start 1144209600 --end 1200978000
> >
> > I would expect daily totals but instead am getting strange (i.e.
> > 3.7916666).
> >
> > Any help is appreciated!
> >
> >
> >
> > _______________________________________________
> > rrd-users mailing list
> > rrd-users at lists.oetiker.ch
> > https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
> >
>
>

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