[rrd-users] Re: data resampling Q

Scott Walters scott at PacketPushers.com
Thu Oct 14 19:49:03 MEST 1999

On Wed, 13 Oct 1999, Tobias Oetiker wrote:

> *> so the closer i get `rrdtool update` to the rrdtool 300 sec interval
> *> (epoch time), the more accurate my samples will become?
> sure ... but if you need more acuracy you should decreass the sampling
> interval so that sampled data shows what you are looking for with sufficient
> accuracy ... aiming for the 300 points is not the right aproach here ...

true.  i guess i meant to say precision, not accuracy.  i cannot change
the sampling rate. 

I'd rather know that "at approximately 14:45 there were exactly 20 users
logged on", than "at exactly 14:45 there were about 20.534 users logged
on".  This is particularly confusing when it is only possible for a
maximum of 20 users to log on at one time! 

I've even considered adding a new, un-interpolated type (an ABSOLUTEGAUGE
perhaps??) to rrd.  What do you think?

i'd love it.  and if more than one sample comes in the interval just
have it keep the most recent . . 

or maybe a mod to rrdtool update that would would round to the nearest


rrdtool update load.rrd NINT:111

Scott Walters

"The world speaks IP"

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