Scott C. Kennedy wrote:
>
> I've run some queries based on modifying the start & end times to
> be not in a "2 hour moment", but...
> + rrdtool fetch data2.rrd AVERAGE -e 996782400 -s end-31days
> + wc -l
> 375
This one is on a 2-hour boundary:
[EMAIL PROTECTED] /tmp]$ perl -e 'use POSIX;print ctime(996782400);'
Thu Aug 2 22:00:00 2001
(this is UTC time + two hours, so 20:00:00 UTC)
OTOH:
> + rrdtool fetch data2.rrd AVERAGE -e 996782700 -s end-31days
> + wc -l
> 376
This isn't, as it's clearly 5 minutes (300 seconds) after the previous time.
So, the problem is different.
> It seems that every query on data1.rrd returns the large number of values,
> yet every
> query on
> data2.rrd returns the 2 hr average values.
Alright, check the properties of data2.rrd using "rrdtool info". Maybe
this RRA is missing:
# one point per 5 minutes, spanning 366 days
rra 5minUse AVERAGE:0.5:1:105500
Make sure to check both the number of rows *and* the consolidation function!
> Maybe, I should look at this a different way, is there a way to specify with
> RRA to
> fetch from?
ahum:
> Alex van den Bogaerdt wrote:
> > Oh, and if everything is working as it should you can use the resolution
> > flag to rrdtool fetch. *If* the time is an exact multiple of 2 hours,
> > you can choose which RRA to use. However, if you try to select the
> > 2-hour RRA but fail to query correct start and end times, it fails:
> > "--start 00:00 --end 22:00" will work (assuming a timezone that is an
> > even number of hours away from UTC) but "--start 00:05 --end 22:05" will
> > not work. It will return data from the 5-minute RRA.
HTH
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