[rrd-users] Absolute values..

Gavin Landon Gavin.Landon at ignitetech.com
Wed Nov 12 23:54:47 CET 2008

Thanks for the response.   However, after looking over the email sent
out by Alex and looking through the link he posted, it makes me think
that RRD isn't going to handle what I'm trying to do.   I want no
response alterations, only exactly what I'm putting in.   Based on the
setting of GAUGE and the use of MAX, shouldn't it do that?   Maybe I'm
misunderstanding the documentation.

Thanks again,

-----Original Message-----
From: andy.riebs at hp.com [mailto:andy.riebs at hp.com] 
Sent: Wednesday, November 12, 2008 3:18 PM
To: rrd-users at lists.oetiker.ch
Cc: Gavin Landon
Subject: Re: [rrd-users] Absolute values..


Please see the mailing list archives from the past 5 days. Alex B (?)
posted an outstanding, and brief, explanation.


On Wednesday 12 November 2008 04:04:30 pm Gavin Landon wrote:
> Was this a newb question and no one wants to answer, no one has ever 
> experienced, or no one has ever validated the data so if it's happen, 
> no one noticed?
> -----Original Message-----
> From: rrd-users-bounces at lists.oetiker.ch
> [mailto:rrd-users-bounces at lists.oetiker.ch] On Behalf Of Gavin Landon
> Sent: Wednesday, November 12, 2008 11:14 AM
> To: rrd-users at lists.oetiker.ch
> Subject: [rrd-users] Absolute values..
> I'm having a few problem which has interrupted my train of thought to 
> the point I'm starting to doubt myself.
> (Problem 1)
> I've been writing a monitoring system for software we have written 
> that report back to us on a minute by minute bases.  I'm only in the 
> development stages so the data is small and in one case it always 
> returns 1.  I find the chart that's looking at this stat is in flux as

> if the values are more than 1.  I've deleted the RRD file then 
> recreated it with data I have in SQL, logging everything that goes 
> into RRD and I never put in anything greater than 1.  Yet my chart 
> still has spikes at the same place up to 20.
> (Problem 2)
> The answer to this one may fix problem 1..  I can't seem to find the 
> balance in the configuration so that the numbers on the side of the 
> left side of the chart match up with the data that is actually in the
> RRD file.   Since I'm also storing the data in SQL at the same time
> it's being placed into RRD, I know I have an exact match up.  However,

> when I tell SQL to give me the MIN and MAX of a specific time frame, 
> then tell RRD to do the same, I get two different values.
> I do have 5 archives.
> Min = .Steps = 1
> 24 hours = .Steps = 60   'Minutes per Hour
> Week = .Steps = 1440     'Minutes per Day
> Month = .Steps = 10080    'Minutes per Week
> Year = .Steps = 43829    '525948.766/12  'Minutes Per Month
> I'm using Gauge when creating it since Absolute, Counter, and Derive 
> all seem to skew the charts as well.  On my archives I'm using MAX 
> function because I found that Average was throwing me way off..  Since

> this is a monitoring interface, I need it to be exact.
> Maybe it's me and I just don't have it configured correctly..  If so, 
> can someone tell me the configuration needed to show what is exactly 
> in RRD, because showing my clients 189 for SQL, but looking at a chart

> that doesn't go over 40 is only going to prompt questions I can't 
> answer.
> Thanks for your time,
> Gavin
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Andy Riebs,  HP Scalable Computing and Infrastructure / Linux R&D
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