[rrd-users] Re: data resampling Q

[Scott Walters]

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. 

-snip-
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?
-snip-

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
interval.

e.g.

rrdtool update load.rrd NINT:111

--
Scott Walters
-PacketPusher

"The world speaks IP"



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