[rrd-users] Re: Wrapping not working correctly

[Webb, Trey]

All,
I have been having this same problem see my earlier post:

http://www.ee.ethz.ch/~slist/rrd-users/msg06675.html

I followed the suggestion of setting a minimum and maximum, with no luck.
The counters are wrapping at 32-bit boundaries and when that happens it
seems to be adding the wrap amount to the average, thus creating a spike.
Any help would be greatly appreciated.

--trey

-----Original Message-----
From: Tobias Oetiker [mailto:oetiker at ee.ethz.ch] 
Sent: Thursday, May 15, 2003 1:33 AM
To: Lordy
Cc: rrd-users at list.ee.ethz.ch
Subject: [rrd-users] Re: Wrapping not working correctly

Today Lordy wrote:
> This is a log of the counter wrap and the according values from the
rrdfile:
>
> TIMESTAMP : INPUT : OUTPUT (log)
> 1052944620 : 26649774336 : 34299525336
> 1052944680 : 26653861104 : 83380896
> 1052944740 : 26657344136 : 214937496
> [...]
> 1052931120 : 25223793736 : 34297051328
> 1052931181 : 25229329384 : 150880920
> 1052931240 : 25234327032 : 343693456
>
> TIMESTAMP : INPUT(AVERAGE) : OUTPUT(AVERAGE) (rrd)
> 1052944500: 3.5023817268e+04 1.1066858514e+06
> 1052944800: 6.5019546667e+04 6.1489146800e+16
> 1052945100: 9.9007487213e+04 3.0024917578e+06
> [...]
> 1052931000: 9.3047440000e+04 3.2095458133e+06
> 1052931300: 8.1707626667e+04 6.1489146801e+16
> 1052931600: 7.2381360000e+04 2.9875407733e+06
>
> Is this a problem with /proc/net/dev, rrdtool or just sh!t in -> sh!t out
?
>
> I'm really curious to hear any comments on this as rrdtool is supposed to
> "handle wraps
> gracefully" according to Tobi's earlier postings on this list.

Lordy,

for wrap detection to work, a min and max must be set, and the
wrpas must happen at 32bit and 64bit bounderies, otherwhise it is
sensible to just use DERIVE datasources with min set to 0

tobi
>
> Best regards,
> Lordy
>
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