[rrd-users] 5 second resolution definition.

[Gerhardus.Geldenhuis at gta-travel.com]

RTFM to myself

RRA:AVERAGE | MIN | MAX | LAST:xff:steps:rows

xff The xfiles factor defines what part of a consolidation interval may
be made up from *UNKNOWN* data while the consolidated value is still
regarded as known. It is given as the ratio of allowed *UNKNOWN* PDPs to
the number of PDPs in the interval. Thus, it ranges from 0 to 1
(exclusive). 

> -----Original Message-----
> From: rrd-users-bounces at lists.oetiker.ch 
> [mailto:rrd-users-bounces at lists.oetiker.ch] On Behalf Of 
> Gerhardus.Geldenhuis at gta-travel.com
> Sent: 19 September 2008 15:53
> To: rrd-users at lists.oetiker.ch
> Subject: Re: [rrd-users] 5 second resolution definition.
> 
> Hi
> (Try again... with reply to all.)
> Thanks for the reply! I just realized my question was a bit vague...
> 
>    rrdtool create test.rrd             \
>             --start 920804400          \
>             DS:speed:COUNTER:600:U:U   \
>             RRA:AVERAGE:0.5:1:24       \
>             RRA:AVERAGE:0.5:6:10
> 
> I am referring to the last two lines; the 0.5 value. I 
> understood that to be where the frequency of sampling is set.
> 
> from the example on
> http://oss.oetiker.ch/rrdtool/tut/rrdtutorial.en.html
> RRA:AVERAGE:0.5:1:24
> RRA:AVERAGE:0.5:6:10
> 
> and keeps 24 samples (24 times 5 minutes is 2 hours). The 
> other averages
> 6 values (half hour) and contains 10 such averages (e.g. 5 hours)
> 
> 
> I am reading the rrdcreate page now so should hopefully find 
> my answer in there.
> 
> Regards 
> 
> > -----Original Message-----
> > From: rrd-users-bounces at lists.oetiker.ch
> > [mailto:rrd-users-bounces at lists.oetiker.ch] On Behalf Of 
> Simon Hobson
> > Sent: 19 September 2008 14:28
> > To: rrd-users at lists.oetiker.ch
> > Subject: Re: [rrd-users] 5 second resolution definition.
> > 
> > <Gerhardus.Geldenhuis at gta-travel.com> wrote:
> > 
> > >I am trying to define an RRA for my graph but I do not
> > understand how
> > >to define the "part" section of the RRA definition
> > 
> > "part" section ?
> > 
> > >5 minutes = 0.5
> > >1 minute = 0.25
> > >
> > >However I dont understand how this value is determined. I do not 
> > >understand how 5 minutes can be 0.5 and 1 minute be 0.25. I
> > can't see
> > >any relation so I dont know how to deduce anything further from it.
> > >Googling has only turned up 5 and 1 minute examples so far.
> > 
> > http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html
> > 
> > 
> > I think you are getting confused.
> > 
> > step sizes are defined in seconds - so "5" for 5 seconds in the rrd 
> > definition.
> > 
> > Then you need to define one or more DSs, and here you need 
> to define 
> > "heartbeat" - how long you can go between samples before 
> the data is 
> > deemed to be invalid. Again, this is defined in seconds.
> > 
> > And lastly, define one or more consolidation functions (CF). 
> > I thik this is where you are getting confused, as "0.5" and "0.25" 
> > sound like xff values : "xff The xfiles factor defines what 
> part of a 
> > consolidation interval may be made up from
> > *UNKNOWN* data while the consolidated value is still regarded as 
> > known." A value of 0.5 means that HALF of the values in the 
> > consolidation interval may be unknown before the whole interval is 
> > considered unknown.
> > 
> > _______________________________________________
> > rrd-users mailing list
> > rrd-users at lists.oetiker.ch
> > https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
> > 
> 
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